The Shenandoah Valley floor in pasture and cropland with limestone outcrops and the Blue Ridge on the horizon.
Frederick County One statewide code, no local amendments

Barndominium Builders in Frederick County, VA

Frederick County is the land answer for Winchester, and the two are separate governments. Winchester is one of Virginia's independent cities — it sits in no county at all, runs its own building department, and the county has no authority inside the city line any more than the city has outside it. The county wrapped around it grew 8.8% between 2020 and 2025 and holds 94,314 acres in farms across 674 operations with a median size of 39 acres, which is the number that decides whether ordinary buyers can get in. What the northern Shenandoah asks in return is design and diligence: 35 psf of ground snow rising to 40 psf in the higher north-western parts, an ultimate design wind of 115 mph against an Exposure C default that most Virginia counties do not use, a 24-inch frost line, engineered plans on any pole building over 600 square feet, roughly 30% of the county underlain by soluble rock, and a county septic ordinance that makes you find soil for two drainfields instead of one.

Frederick County at a glance

County
Frederick County
Population
99,955
ZIP codes
22602, 22603, 22624, 22625, 22637, 22645, 22654, 22655, 22656
Site visits
Site visits across the county and the Winchester ring, usually within the week
Start your project

Building conditions in Frederick County

The building code itself is the same in every Virginia locality, and no county, city or town may amend it. What changes from one to the next is who issues the permit and inspects the work, what that office charges, how the parcel is zoned, and the Table R301.2 design criteria the locality publishes — the 2021 Virginia Residential Code prints that table blank, with the instruction that additional criteria shall be established by the local jurisdiction. Those local numbers are what your drawings have to satisfy.

Build conditions for Frederick County , Virginia : design wind speed 115 mph. BUILD CONDITIONS FREDERICK COUNTY…Frederick CountyONE STATEWIDE CODEDESIGN WIND SPEED115 mphFrederick County's own published figure, from its Local Design Criteria page, which lists basicwind speed by risk category under Virginia Construction Code Section 1609.3: Risk Category I 105…ZONING · RA, RURAL AREAS5 acres, at a maximum density of one…Set by Frederick County, Chapter 165 Zoning, Table IV-2. Frontsetback 60 ft for principal structures; accessory structures 60 ft…STATE AND CARD SURCHARGES ON THE COUNTY PERMI…2% state surcharge, plus 2.5% on cre…Not an impact fee. Frederick County's published building feeschedule effective July 2026 states that its fees are subject to a…WHO ISSUES THE PERMITFrederick County Department of Build…107 North Kent Street, Winchester, VA 22601. Established by CountyCode Section 52-1 under a Chief Building Official; Section 52-3…
Build conditions for Frederick County, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.
The land answer for Winchester, at a median of 39 acres
Frederick County holds 94,314 acres in farms across 674 operations, 34.9% of its 413 square miles, with a median farm size of 39 acres and 377 operations under 50 acres. Population rose from 91,891 in 2020 to 99,955 on 1 July 2025, a gain of 8.8% — faster than Shenandoah County at 3.6% or Clarke at 5.3%. The median is the number that matters: this is a county of tracts the size a family buys, not of 500-acre blocks, and it is filling up.

2022 Census of Agriculture (USDA NASS), county series: acres operated, area operated as a percent of total land, acres per operation median, and the 1.0-9.9 and 10.0-49.9 acre area-operated categories; Census Vintage 2025 population estimates

Winchester is a city in no county, and the county has two towns
Winchester is one of Virginia's independent cities: the Census Bureau's own subcounty file gives it county-equivalent code 840 and lists it nowhere under Frederick County's code 069. It runs its own permit portal for building permits, and Frederick County has no authority inside the city line. The same file shows the county contains exactly two incorporated places — Middletown at 1,471 people and Stephens City at 2,207 — and the county building department permits inside both of them.

US Census Bureau, sub-est2025_51.csv, Vintage 2025 subcounty population estimates, SUMLEV 050/157 records for COUNTY 069 and 840; City of Winchester, Permits, Licensing & Applications; Frederick County Residential Building Permit Application Checklist

The county publishes six design numbers and leaves the rest of the table blank
Frederick County's Local Design Criteria page publishes ground snow of 35 lb/ft2, rising to 40 lb/ft2 in the higher north-western parts of the county; basic wind speed of 105/115/120/125 mph by risk category; Exposure Category C as the default; Seismic Design Category B; and a frost line depth of 24 inches below grade. Weathering, termite, decay, winter design temperature, ice barrier, air freezing index and mean annual temperature are not published anywhere by this county. The page is also written on the commercial Virginia Construction Code sections rather than the residential table.

Frederick County, Local Design Criteria, fcva.us/departments/building-inspections/local-design-criteria

A pole building over 600 square feet needs engineered plans here
Frederick County's own Pole Building permit requirements state that engineered plans and documents are required for pole buildings exceeding 600 square feet, and shall be designed for the local area wind and snow requirements. That means a sealed design to 115 mph at Exposure C and 35 or 40 psf of ground snow. The county asks for post size and spacing with a footing detail, header sizes, a roof framing plan with rafter or truss direction, and four elevations, and it reviews the application twice — zoning for setbacks, inspections for the residential code.

Frederick County Inspections Department, POLE BUILDING - BUILDING PERMIT APPLICATION REQUIREMENTS

Roughly 30% karst, and nobody looks under a single house
Frederick sits in the 30% band for share of county underlain by karst. Its code defines KARST AREA and KARST FEATURES, but only in Chapter 143, the stormwater and erosion chapter, which requires karst features to be shown on a stormwater management plan. The zoning ordinance forbids disturbing a sinkhole at Section 165-803.03A(5) — and that section reaches only developments requiring a rezoning, master development plan, subdivision design plan, site plan or preliminary sketch plan, none of which a single house on an existing lot files. The word geotechnical appears nowhere in the Frederick County Code. In a county this size on soluble rock, a subsurface investigation before you pour is the owner's decision, not the county's requirement.

Belo, Bradley Paul, Natural Hazard Mitigation Planning For Karst Terrains in Virginia, Virginia Tech, 2003, Table 3.1, attributed to the Virginia Speleological Survey (2003); Frederick County Code Sections 143-110, 143-165, 165-803.03 and 165-1102.01, ecode360 FR1364

Two drainfields, by county ordinance, on ground the county calls fragile
Frederick County Code Section 161-101.01A states that the county is deemed to have fragile hydrogeology and the potential for depletion and contamination of water sources. On that basis Section 161-201.03 requires every structure served by an on-site sewage system to have a 100% reserve drainfield in addition to the primary one, bars conditional permits for new construction unless the Board of Supervisors specifically authorises them, and prohibits alternative onsite discharging treatment systems for new residential applications altogether. Elsewhere in Virginia a full reserve field is a Chesapeake Bay Act obligation; Frederick is not on that statutory list and imposes it anyway.

Frederick County Code Chapter 161, Sewage Disposal and Sewers, Sections 161-101.01 and 161-201.03, adopted 9-12-1984 and amended in its entirety 2-24-2010, ecode360 FR1364

Also worth knowing before you build in Frederick County

A barn can break the 35-foot height limit. A barn you live in cannot
Maximum height in the RA district is 35 feet for all structures. Section 165-403.03B exempts barns and silos from the height limit — but only where the structure accomplishes its intended purpose, does not infringe neighbouring solar access, and is not intended for human occupancy. Anything using an exception has to be set back an extra foot for every foot it exceeds the district maximum. So the tall monitor-roof barn is available to a farm building and not to a home.

Frederick County Code Sections 165-403.03 and 165-404.01, Table IV-2, ecode360 FR1364

One dwelling per lot, and a sink and a stove are the proof
Section 165-402.03A(2) allows no more than one dwelling on a lot except where the chapter specifically permits it, and adds that a separate entrance together with separate equipment including a sink, stove or other kitchen or sanitary facilities is prima facie evidence that a separate dwelling exists. Section 165-1102.01 defines a dwelling as a residential structure or portion thereof used exclusively for human habitation. A single building that combines shop and living space is one dwelling. A separate shop fitted out with living quarters is a second one.

Frederick County Code Sections 165-402.03 and 165-1102.01, ecode360 FR1364

The detached shop-apartment is allowed in RA, and it is size-capped
Section 165-706.01A allows one accessory dwelling with any single-family dwelling, with a floor area no more than 25% of the gross floor area of the primary residence or a minimum of 500 square feet, whichever is greater. The requirement that it be attached applies only in the RP, R4 and R5 districts, so in the Rural Areas district it may be detached. The catch is Section 165-307.02A(1)(h): any parcel proposed to contain more than one dwelling unit needs a site plan, unless the unit is housing for workers on a bona fide operating farm under Section 165-706.02C(2).

Frederick County Code Sections 165-706.01, 165-706.02 and 165-307.02, ecode360 FR1364

The shop can go up before the house, at 650 square feet and empty
Section 165-404.01A(2) permits one uninhabitable accessory structure meeting the accessory setbacks to stand on an RA lot before the principal structure is built. It may not contain any residential use until the primary structure exists, and it is capped at 650 square feet. That is the whole of the build-the-shop-and-camp-in-it plan as the county allows it.

Frederick County Code Section 165-404.01A(2), ecode360 FR1364

The county's published permit fees, and the 3,000 sq ft line
Frederick County's building fee schedule effective July 2026 charges $0.45 per square foot for one- and two-family dwellings, and that figure includes the electrical, plumbing and mechanical permits. Detached garages, accessory buildings, pole buildings, carports and shelters are $110.00 up to 600 square feet and $110.00 plus $0.12 per square foot above 600 — with a note that above 3,000 square feet the commercial fee applies. A re-inspection at the inspector's discretion is $75.00 and starting residential work before the permit is $150.00.

Frederick County Building Inspections, FEE SCHEDULE EFFECTIVE JULY 2026

An erosion inspection happens before the permit is handed over
Frederick County states that effective 1 December 2019 a preliminary erosion and sediment control inspection is required prior to the release of a building permit for any new one and two family dwelling. The residential checklist also wants the VDOT driveway entry packet completed and signed by VDOT, an agreement in lieu of a residential land disturbance permit, and Health Department approval or Sanitation Authority paperwork in hand when the permit is collected. An individual site grading plan may be required on top of that.

Frederick County, Applying for a Permit; Frederick County Residential Building Permit Application Checklist - New One & Two Family Dwellings & Additions

A surveyor has to come back mid-framing on a tight lot
Section 165-403.04 requires a surveyor licensed in Virginia to establish the location of any primary structure sited five feet or less from a minimum setback, and of any accessory structure of 500 square feet or greater at that distance. Footing stakeout information goes on the building permit setback report and is posted on site with the permit card at the footing inspection; a second, mid-construction survey is prepared once the foundation, all exterior walls and the roof system are up, and it must reach Building Inspections before a certificate of occupancy issues.

Frederick County Code Section 165-403.04, ecode360 FR1364

A Zone 1 radon county that has not adopted radon-resistant construction
EPA's own county table puts Frederick in Zone 1, the band predicted to average above 4 pCi/L indoors, from a map developed in 1993. The Virginia Residential Code makes radon-resistant construction a local option a locality must adopt through the zoning enabling article, which is why neighbouring Shenandoah County's adoption sits in its zoning chapter rather than its building chapter. A search of the entire Frederick County Code, zoning included, returns zero matches for radon. The rough-in is inexpensive at slab stage and expensive afterwards, and here it is the owner's call.

EPA county radon zone table, radon_zones-spreadsheet.xls; Frederick County Code full-text search, ecode360 FR1364, code date 13 May 2026; Shenandoah County Code Chapter 165, Article XX, Section 165-161

The farm exemption is decided on one phrase, and the county makes you sign it
Frederick County publishes a Farm Use Exemption form that reprints the governing definition on its reverse: a farm building or structure is one not used for residential purposes, on property where farming operations take place, used primarily for storage or handling of farm products, sheltering animals, farm office use, farm machinery, farm supplies, or best management practices. The applicant circles which of those six applies, states the acreage, zoning and building size, signs it, and the Building Code Official marks it approved or denied. A building anyone lives in does not clear that phrase.

Frederick County Inspections Department, Farm Buildings & Structures Packet (Farm Use Exemption form), reprinting USBC Section 102.3 exemption 9 and the Chapter 2 definition of farm building or structure

Steep slopes are a county definition here, not a state one
Frederick County defines steep slopes in Section 165-1102.01 as land areas where the slope exceeds 35%, and Section 165-803.03A(7) allows no more than 35% of those areas to be disturbed or regraded, with the Zoning Administrator able to release small extra areas on a written request. Like the sinkhole rule beside it, it bites at rezoning, master development plan, subdivision or site plan stage. The one slope rule that is plainly state law is the protected mountain ridge provision at Va. Code Section 15.2-2295.1, which reaches ridges at or above 2,000 feet and 500 feet above the valley floor — worth a check on the county's western edge.

Frederick County Code Sections 165-803.03 and 165-1102.01, ecode360 FR1364; Va. Code Section 15.2-2295.1

An alternative septic system becomes a recorded obligation on the deed
Where a conventional system will not fit, Section 161-201.10 requires an agreement approved by the Health Department to be signed and recorded in the land records of the Clerk of the Circuit Court of Frederick County before an operation permit issues. The obligation runs with the land and binds later owners, the owner must keep a maintenance contract with an approved operator at all times, and an annual inspection report has to be filed with the Health Department within 30 days of the agreement's anniversary. Civil penalties run $100 for an initial summons and $150 for each additional one.

Frederick County Code Sections 161-201.10 and 161-401.01, ecode360 FR1364

The airport overlay carries the city's name and the county's rules
Frederick County administers an Airport District overlay at Section 165-502 covering airport safety zones, height limits, use restrictions and a 65 LDN noise map for the Winchester Regional Airport. The Executive Director of the Winchester Regional Airport Authority supplies the noise map and the county Department of Planning and Development maintains it and reviews development inside the noise zones. A variance needs a determination from the Virginia Department of Aviation first, with a copy to the Authority.

Frederick County Code Sections 165-502.01 through 165-502.07, ecode360 FR1364

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Below the slab

The expensive surprises are in the ground, not the building

What moves a Virginia budget is usually below grade, and it is soil rather than rock. Five localities already treat a soil answer as a condition of the permit rather than a recommendation — Fauquier, Chesterfield, Isle of Wight, Madison and Culpeper each require a soil report, an engineered foundation design, or both before the footings are approved. Chesterfield asks for one on every new house with no opt-out, on its own published reasoning that small amounts of shrink-swell soil may turn up anywhere in the county. Virginia Energy puts the same point bluntly: standard homeowner's insurance does not cover damage from expansive or compressive soils. Along the Interstate 81 corridor the question changes shape entirely — Virginia Energy counts twenty-seven Virginia counties in the karst zone that follows that road, where what matters is what is under the slab rather than what the slab sits in, and karst does not stay west of the Blue Ridge: Loudoun County publishes karst terrain of its own, on the other side of it. The same ground then sizes the septic system, because 12VAC5-610 works from bedrooms and soil texture — 150 gallons a day per bedroom, with no row in the table for a shop, a garage or a barn at all, and clay assigned to the slowest texture group at 91 minutes per inch or worse, past the 45 minutes per inch that makes a reserve drainfield mandatory. The soil that needs a foundation engineer multiplies the drainfield. So the site work, the foundation and the drainfield get resolved together rather than one at a time. We price the dirt before we price the building.

What we build in Frederick County

All nine services are available in Frederick County. What a build costs depends far more on the parcel than on square footage, so we price against your land rather than publishing a rate card.

Custom Plans

Barndominium floor plans drawn to your parcel and to the design criteria your own Virginia locality publishes, not to a generic national spec.

Barndominium Kits

Engineered barndominium shell packages delivered to your Virginia land, drawn to the criteria your own building department fills in.

Turnkey Builds

Start to finish barndominium construction: permits, site work, shell and full interior finish, under one contract and one schedule.

See all nine services

What a build looks like

Three stages every Frederick County project passes through, from a raw parcel to a finished home. Site work first, because that is where the budget is decided.

Aerial view of an undeveloped rural lot with cleared grass, a oak and hickory treeline with a few loblolly pines, and a pale gravel access track.
Stage one

The parcel

Zoning, setbacks, flood zone and utility access get checked before anything is drawn.

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Stage two

Pad and permit

Clearing, grading and a compacted pad, while the submittal works through whichever office issues the permit where you are building.

A finished barndominium at dusk with warm interior lighting glowing through its large windows.
Stage three

Frame to finish

Shell erected and dried in, then systems, insulation and interior finish through to CO.

Those are the rules where you are building in Frederick County. Tell us what you want to build and we will draw it to them.

Start your project

Where we build around Frederick County

Frederick County and the rural land around it. The buildable acreage for a project this size usually sits outside the city limits, which is frequently what changes who issues your permit.

The Frederick County service area, including the rural acreage outside the built-up edge, which is where the parcels big enough for a build like this usually sit. The map marks the territory we build in. It is not a branch location, and there is no office at this pin.

Keep reading

The questions that usually come next once you know what Frederick County allows.

Barndominium Cost Guide

Sourced per-square-foot ranges by tier and by size, with a calculator built on the same figures.

Read it

Is It Legal in Virginia?

Classification, zoning, the HOA gate, and why "nonresidential farm building" does not cover a home.

Read it

How Long Does It Take?

Census build-duration data, and what actually sets the permit clock where you are building.

Read it

Nearby areas we build in

Others we cover nearby. One may be a county, another an independent city that belongs to no county at all, and another a town inside a county — so the office that issues the permit, the fees it charges, the zoning and the design criteria each locality publishes can all differ from one card to the next.

Winchester

Winchester
Shenandoah County

Shenandoah County
Clarke & Warren Counties

Clarke County

Building in Frederick County: common questions

9 questions we get asked most often about building in Frederick County. If yours is not on the list, ask it directly.

Start your project
Who issues my building permit in Frederick County, and does that change inside Middletown or Stephens City?
The Frederick County Department of Building Inspections issues it everywhere in the county, including inside both towns. Middletown and Stephens City are the only two incorporated places in Frederick County, and neither runs a building department. Middletown's own town code sends the plans and materials statement to the Frederick County Building Inspections Department, which issues the permit, and puts inspections with the County Building Inspector; it even designates the Frederick County Board of Building Appeals as its appeals board. Stephens City states that a town zoning permit is required before you apply for a building permit with the county, and that the town partners with Frederick County for all building and construction inspections. What the towns do run is zoning, so the order is town zoning permit first, county building permit second — and going to the county first will only send you back. Middletown publishes its own zoning fees: $100 for residential new construction, $30 for an accessory structure.
My land is just outside Winchester. Is the city or the county in charge?
The county, and it is worth being precise about why. Winchester is one of Virginia's independent cities. It belongs to no county at all — the Census Bureau gives it its own county-equivalent code, separate from Frederick County's, and the two appear as separate components of the same metropolitan area. There is no county building department above Winchester and no county zoning reaching into it, and equally the city has no authority one foot outside its line. Winchester runs its own permit portal for building permits; Frederick County runs its own department at 107 North Kent Street. Frederick County's residential permit checklist tells applicants inside Stephens City and Middletown to get town zoning approval and says nothing about Winchester, because Winchester is not a town inside the county to be named. Practically, the city is 9.2 square miles at about 3,000 people per square mile and there is essentially nothing to build a barndominium on inside it. The county wrapped around it has 674 farms and 94,314 acres.
Roughly a third of this county is karst. Is anyone checking for voids under my slab?
Not as part of your permit, and that surprises people. Frederick County's code does define karst — Chapter 143, the stormwater and erosion chapter, defines a karst area as land predominantly underlain at the surface or shallow subsurface by limestone, dolomite or other soluble bedrock regardless of any obvious surface features, and requires karst features to be shown on a stormwater management plan. The zoning ordinance separately forbids disturbing a sinkhole other than filling it with nonpolluting natural material. But every one of those rules attaches to a plan — a rezoning, a master development plan, a subdivision design plan, a site plan or a preliminary sketch plan — and a single house on an existing five-acre lot files none of them. The stormwater program expressly excludes a single-family residence built on its own and disturbing less than an acre. And the word geotechnical does not appear anywhere in the county code. So a subsurface investigation is a decision you make, not a box the county ticks. If you want one, the benchmark to hold a consultant to is the Virginia Cave Board's Karst Assessment Standard Practice, which asks for a professional engineer with a geotechnical specialty and five years of karst experience, or a certified professional geologist with five years in karst studies, signing and sealing a statement of qualifications. One caution about the erosion side: the county requires a preliminary erosion and sediment control inspection before it releases the building permit for a new dwelling, and that is a runoff inspection, not a subsurface one.
Do I need an engineer for a post-frame shop or shop-house in Frederick County?
Above 600 square feet, yes, and the county says so in writing. Its Pole Building permit requirements state that engineered plans and documents are required for pole buildings exceeding 600 square feet and shall be designed for the local area wind and snow requirements. Those requirements are the county's own published numbers: an ultimate design wind speed of 115 mph for a Risk Category II building, with Exposure Category C as the county's default rather than the Exposure B most Virginia jurisdictions assume, and ground snow of 35 psf across most of the county rising to 40 psf in the higher north-western parts. Exposure C is the one people miss — open, scattered-obstruction terrain, which is exactly what most Frederick County farmland is, and it meaningfully raises the pressures a wide, low-eave building has to carry. The county also wants post size and spacing with a footing detail, header sizes, and a roof framing plan showing rafter or truss size, spacing and direction, plus manufacturer's data for engineered trusses.
Can I put the shop up first and live in it while the house goes together?
You can put the shop up first. You cannot live in it. Frederick County allows exactly one uninhabitable accessory structure on an RA lot before the principal structure is built, it may contain no residential use until the primary structure exists, and it is capped at 650 square feet. Beyond that, the county allows only one dwelling on a lot except where the zoning chapter specifically permits it, and it tells you how it will decide the question: a separate entrance together with separate equipment including a sink, stove or other kitchen or sanitary facilities is prima facie evidence that a separate dwelling exists. Its definition of a dwelling reaches a residential structure or any portion of one used for human habitation. The lawful version of a separate shop with living quarters is an accessory dwelling — one is allowed alongside a single-family home, sized at no more than 25% of the main house's gross floor area or 500 square feet, whichever is greater, and in the Rural Areas district it does not have to be attached. But a parcel proposed to contain more than one dwelling unit needs a site plan, which a single combined building never does.
What does the septic side of a Frederick County parcel actually require?
More than the state minimum, and the extra is the part that decides whether a lot works. The county's own ordinance opens by declaring that Frederick County is deemed to have fragile hydrogeology with the potential for depletion and contamination of water sources. On that footing it requires every structure served by an on-site sewage system to have a 100% reserve drainfield in addition to the primary field, bars conditional permits for new construction unless the Board of Supervisors specifically authorises them, and does not permit alternative onsite discharging treatment systems for new residential applications at all. So you need soil for two drainfields, on ground the county itself calls fragile. The Health Department issues the septic permit, and the state sizes the system at 150 gallons per day per bedroom — a table with no row for a shop, a garage or a barn, so the bedroom count is what drives it. If a conventional system will not fit and an alternative system is used, the maintenance agreement gets recorded in the circuit court land records, runs with the land, binds whoever buys the place from you, and carries an annual inspection filed with the Health Department. Health Department approval, or Sanitation Authority paperwork where hookup fees are paid, has to be in hand when you collect the building permit.
Is radon-resistant construction required here?
No, and the honest version of that answer has two halves. EPA's county table puts Frederick in Zone 1 — the band predicted to average above 4 picocuries per litre indoors — on a map EPA developed in 1993. But radon-resistant construction is a local option in the Virginia Residential Code, and a Virginia locality has to adopt it through the zoning enabling article, which is why neighbouring Shenandoah County's adoption lives in its zoning chapter and not in its building chapter. A full-text search of the Frederick County Code, zoning chapter included, returns zero matches for the word radon at the current code date. So the county will not require it and no inspector will ask. A passive sub-slab depressurisation rough-in costs very little while the slab is still open and a great deal once it is closed, which makes this one of the few decisions on a Frederick County build that is entirely yours and genuinely cheap to get right early.
How close to the property line can I put a barndominium, and how tall can it be?
In the RA district the front setback is 60 feet for the principal structure, and 60 feet for an accessory structure off a public right-of-way or 45 feet off a private one. The side and rear setback is the one that catches people, because it is set by your neighbour's parcel rather than yours: 50 feet where the adjoining parcel is six acres or less, 100 feet where it is larger, and 200 feet where that larger parcel sits in an Agricultural and Forest District or is an orchard. Accessory structures take 15 feet at the side and rear. Minimum lot width is 250 feet and the maximum depth-to-width ratio is 5:1. Height is capped at 35 feet for all structures, with one exception that matters here: barns and silos are exempt from the height limit, but only where the structure is not intended for human occupancy — so the tall barn is available to a farm building and not to a home. One more thing to plan for: if the building lands within five feet of a setback, a surveyor licensed in Virginia has to stake the footing and come back for a mid-construction survey once the foundation, walls and roof are up, and that sealed report has to reach Building Inspections before the certificate of occupancy.
What will Frederick County charge me for the permit?
The county publishes its schedule, so these are its figures rather than anyone's estimate. On the fee schedule effective July 2026, one- and two-family dwellings are $0.45 per square foot, and that single fee covers the electrical, plumbing and mechanical permits as well. Detached garages, accessory buildings, pole buildings, carports and shelters are $110.00 up to 600 square feet, and $110.00 plus $0.12 per square foot above 600 — with a note that above 3,000 square feet the commercial fee schedule applies instead, which matters if the plan is a modest house now and a large separate shop later. Everything carries a 2% state surcharge, payment is due when the permit is issued, and paying by card adds 2.5%. A re-inspection at the inspector's discretion is $75.00 and starting residential work before the permit is issued is $150.00. One local trap worth knowing before you plan a timeline: the county cannot even take the application until any delinquent real estate taxes or other liens the county holds against the parcel are cleared.

Building in Frederick County?

Start with the plan. Tell us what you want to build and we will draw it, then confirm which office issues the permit for your parcel, what it will let you put there, and what wind load it has to meet. That conversation costs nothing.

Start your project