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Washington DC vs Fairfax County Permit Fees (2026)

Side-by-side comparison of two DMV-anchor jurisdictions. Washington DC uses a 4-tier valuation formula for alterations ($30 + 2% of value in the relevant Tier 3) plus a universal 10% Enhanced Fee plus a separate Green Building Fee of 0.13%. Fairfax County, Virginia uses a 3% rate on declared construction value plus a 2% Virginia state levy and a 10% county technology surcharge (Appendix Q FY2027, effective July 1, 2026). The two structures cross at different project sizes: DC is dramatically cheaper for typical residential alterations and decks; Fairfax is cheaper for in-ground pools (flat $93.52 all-in) and for sq-ft-priced new single-family homes (because Fairfax's per-square-foot wood-frame rate of $0.15 stays low at high construction values).

Key Takeaways
  • DC and Fairfax use opposite fee philosophies. DC's alteration tier formula caps the marginal cost at 2% of declared value (then 1% above $1M) and adds a flat 10% Enhanced Fee. Fairfax charges 3% of declared value, then adds the 2% state levy and a 10% technology surcharge on the permit fee - effective rate 3.36% for a typical alteration.
  • DC wins on every value-priced category PermitPrice tested. The savings widen as project value rises: DC saves $119.55 on a $15,000 deck, $272.10 on a $30,000 alteration, and grows further at higher alteration values. Fairfax wins on in-ground pools ($192.48) and sq-ft-priced new construction ($196.40 at 2,000 sq ft).
  • Fairfax wins on per-square-foot new construction. Fairfax's wood-frame (VA/VB type) rate of $0.15/sq ft applied to a 2,000 sq ft home gives a $300 base permit ($336.00 all-in with the 2% levy and 10% technology surcharge). DC's $0.03 per cubic foot applied to ~16,000 cubic feet (8-ft ceilings) gives $480 base ($532.40 all-in). Fairfax's base rate is structurally lower for typical residential cubic-foot-to-square-foot ratios, and its 12% add-ons leave a $196.40 margin.
  • Decks are classified differently. Fairfax bills decks at 3% of declared value (deck-specific). DC processes decks under the alteration tier formula because the DOB Fee Schedule does not list deck as its own line item.
  • Pools: Fairfax flat $83.50 + 2% levy ($1.67) + 10% technology surcharge ($8.35) = $93.52. DC flat $260 + 10% Enhanced Fee. Fairfax saves $192.48.
  • Trade permits are separate in both jurisdictions. DC charges per outlet/fixture/equipment unit with 10% Enhanced. Fairfax charges tiered by amperage (electrical), fixture count (plumbing), and zone count (HVAC), plus 2% state levy. Trade permits add to the totals shown here for projects with electrical, plumbing, or HVAC scope.
  • Both jurisdictions are verified. DC: live DOB Fee Schedule on dob.dc.gov captured April 25, 2026. Fairfax: Appendix Q FY2027 PDF (effective July 1, 2026).
DC Fee Schedule Fairfax County Fee Schedule

Source Evidence Quality

Washington, DC

DOB Building Permit Fee Schedule

Live page on dob.dc.gov/node/1620346

Status: Captured April 25, 2026. Live page (not a dated PDF). DOB updates the page when fees change. PermitPrice tracks for re-verification quarterly. Verified

Fairfax County, VA

Appendix Q LDS Fee Schedule

PDF on fairfaxcounty.gov

Status: Effective July 1, 2026 (FY2027, Appendix Q amendment 05-26-Q adopted May 5, 2026). Verified September 18, 2026. Half of the Fairfax permit fee is due at application as a filing-fee deposit and is credited at issuance (County Code 61-1-3(d)11); it is not an extra charge. Verified

All worked examples use verified, current rates from each jurisdiction's official source. No estimates used; both jurisdictions verified.

Worked Examples (Same Project, Both Jurisdictions)

Example 1: $30,000 Kitchen Alteration

Component DC Fairfax County, VA
Building permit fee Alteration tier 3: $30 + 2% x $30,000 = $630 3% x $30,000 = $900
Plan review fee Built into tier formula (no separate line) None added (50% filing-fee deposit at application, credited at issuance)
Enhanced Fee (DC) / State levy (VA) $630 x 10% = $63 on permit $900 x 2% = $18 levy + $900 x 10% = $90 Fairfax tech surcharge
Green Building Fee (DC only) $30,000 x 0.13% = $39, +10% Enhanced = $42.90 n/a
Total - Building Permit Only $735.90 $1,008.00
DC saves $272.10 (27.0% cheaper in DC)

Example 2: $15,000 Deck

Component DC Fairfax County, VA
Building permit fee Alteration tier 3: $30 + 2% x $15,000 = $330 3% x $15,000 = $450
Plan review fee Built into tier formula None added (50% filing-fee deposit at application, credited at issuance)
Enhanced Fee (DC) / State levy (VA) $330 x 10% = $33 $450 x 2% = $9.00 levy + $450 x 10% = $45.00 Fairfax tech surcharge
Green Building Fee (DC only) $15,000 x 0.13% x 1.10 = $21.45 n/a
Total - Building Permit Only $384.45 $504.00
DC saves $119.55 (23.7% cheaper in DC)

Example 3: $30,000 In-Ground Pool (Up to 15,000 Gallons)

Component DC Fairfax County, VA
Building permit fee $260 flat (in-ground, ≤ 15,000 gal) $83.50 flat (swimming pool inground, I-B(M))
Plan review fee n/a (no separate line) None added (50% filing-fee deposit at application, credited at issuance)
Enhanced Fee (DC) / State levy (VA) $260 x 10% = $26 $83.50 x 2% = $1.67 levy + x 10% = $8.35 Fairfax tech surcharge
Total - Building Permit Only $286.00 $93.52
Fairfax saves $192.48 (67.3% cheaper in Fairfax)

Example 4: 2,000 sq ft New Single-Family Home ($400,000 declared value)

Component DC Fairfax County, VA
Building permit fee 16,000 cu ft x $0.03 = $480
(2,000 sq ft x 8-ft ceiling assumption)		 2,000 sq ft x $0.15 = $300
(VA/VB wood-frame tier)
Plan review fee Built into volume formula None added (50% filing-fee deposit at application, credited at issuance)
Enhanced Fee (DC) / State levy (VA) $480 x 10% = $48 $300 x 2% = $6 levy + x 10% = $30 Fairfax tech surcharge
Green Building Fee (DC only) 2,000 sq ft x $0.002 x 1.10 = $4.40 n/a
Total - Building Permit Only $532.40 $336.00
Fairfax saves $196.40 (36.9% cheaper in Fairfax)

Examples 3 and 4 are the categories where Fairfax beats DC. Fairfax's per-square-foot wood-frame rate ($0.15/sq ft) is structurally lower than DC's per-cubic-foot rate ($0.03/cu ft) for typical residential builds, and Fairfax's 12% add-ons still leave a $196.40 margin at 2,000 sq ft. The crossover depends on ceiling height: at higher ceilings (vaulted, multi-story unfinished volume), DC's cubic-foot rate makes more projects sit above Fairfax. At standard 8-ft ceilings, Fairfax wins for new SFD builds. Note: Fairfax also has higher tier rates for steel/concrete construction ($0.22 IIA/IIIA/IV; $0.28 IA/IB) - the $0.28 tier ($627.20 all-in at 2,000 sq ft) tips the result back to DC, while the $0.22 tier ($492.80) still edges DC's $532.40.

Decision Rule by Project Type

Which jurisdiction is cheaper for the project type you actually have. Based on verified rates and PermitPrice's worked examples.

Project Type DC Fairfax Cheaper
Small alteration (under $5,000) ~$50-$150 all-in $141.75 minimum + 2% levy + 10% tech = $158.77 DC
Mid-size alteration ($15,000-$30,000) $384-$735 $504-$1,008 DC (saves $120-$272+)
Large alteration / addition ($80,000+) $1,907 (alteration) or $133 (additions, cubic-foot pricing) $2,688 (alteration, 3% rate) or $158.77-$336 (additions, $0.15/sq ft area-priced) DC (especially as addition)
Deck (any value) Alteration tier formula 3% rate DC
In-ground pool (≤ 15,000 gal) $286.00 $93.52 Fairfax (saves $192)
Above-ground pool No specific line; alteration tier or pool 3% rate (no separate above-ground line) Verify scope; likely DC
Garage or shed (new) $71.50 flat $0.15/sq ft (garage) or 3% (shed), $141.75 minimum - $158.77 all-in floor DC (sheds especially)
Fence $36.30 flat Most fences exempt unless > 7 ft Fairfax (most fences exempt)
New SFD (per-sq-ft pricing, wood frame, 2,000 sq ft / $400k) $532.40 $336.00 Fairfax (saves $196)
Demolition $30 + 2% of cost + 10% Enhanced $141.75 flat for an entire structure ($158.77 all-in); 3% of cost for partial demolition DC
Solar panels (residential up to 15 kW) $36.30 (Instant Permit) Permit fee waived ($0) but permit still required Fairfax ($0)

Side-by-Side Fee Structure

How each jurisdiction structures its residential building permit fees, surcharges, and supplemental charges. All amounts as published in current schedules.

Component Washington, DC Fairfax County, VA
Alteration / repair pricing 4-tier valuation: $33 flat < $500; $65 flat $501-$1,000; $30 + 2% $1,001-$1M; $10,030 + 1% over $1M 3% of construction value, $141.75 minimum
New construction pricing $0.03 per cubic foot $0.15 per sq ft (wood frame VA/VB); $0.22 (IIA/IIIA/IV); $0.28 (IA/IB); $141.75 minimum
Plan review Built into permit fee (no separate line for first-pass) 50% of permit fee collected at application as a deposit, credited at issuance (not added)
Repeat plan review (after rejection) $71.50 single-family Not itemized separately in Appendix Q
Universal surcharge 10% Enhanced Fee on every line item 2% Virginia state levy + 10% county technology surcharge on the building permit fee
Green Building Fee 0.13% of value (alterations); $0.002/sq ft (new); +10% Enhanced n/a
Filing deposit (new construction) 50% of assessed permit fee, max $20,000, paid at filing; +10% Enhanced 50% of permit fee at application (all permits), credited at issuance; non-refundable if the application expires
In-ground pool $260 + 10% = $286.00 (up to 15,000 gal) $83.50 + $1.67 levy + $8.35 tech = $93.52
Garage / shed (new) $65 + 10% = $71.50 flat $0.15/sq ft garage or 3% shed ($141.75 minimum + levy + tech = $158.77 floor)
Fence $33 + 10% = $36.30 Most exempt (under 7 ft and not in floodplain)
Solar panels (residential up to 15 kW) Instant Permit $33 + 10% = $36.30 Fee waived ($0) but permit still required
Trade permits Per outlet/fixture/equipment, +10% Enhanced; $20 minimum electrical Residential alteration electrical $141.75; mechanical by zone count from $141.75; plumbing by fixture count; +2% levy +10% tech, no filing fee

Practitioner Insight

In Northern Virginia, we consistently see jurisdictions apply surcharges that can double the base permit fee. Fairfax County's 3% rate and 10% technology surcharge are the drivers of the gap with DC. For a $30,000 alteration, Fairfax's $900 building permit alone exceeds DC's entire $735.90 all-in fee. Homeowners sometimes mistake Fairfax's 50% plan review filing fee for an extra charge; it is a deposit collected at application and credited toward the permit fee at issuance (County Code 61-1-3(d)11). DC's tier formula folds plan review into the base, making the all-in headline fee lower still.

DC's structural disadvantage is sq-ft-priced new construction. Fairfax's $0.15/sq ft wood-frame rate is one of the lowest published per-sq-ft rates among DMV jurisdictions verified to date. DC's $0.03/cubic foot at standard 8-ft ceilings works out to ~$0.24/sq ft - higher than Fairfax wood-frame. For new home construction in particular, Fairfax beats DC by about 37% at 2,000 sq ft ($336.00 vs $532.40) even after Fairfax's 2% state levy and 10% technology surcharge. The rare project where this matters is a homeowner choosing between Fairfax (Northern Virginia) and DC for a new build; for renovations on an existing home, DC is dramatically cheaper.

Frequently Asked Questions

DC is significantly cheaper than Fairfax County for most residential projects. For typical alterations and decks, DC saves about 24-27% on the all-in permit fee. For a $30,000 kitchen alteration: DC $735.90 vs Fairfax $1,008 (DC saves $272.10). For a $15,000 deck: DC $384.45 vs Fairfax $504.00 (DC saves $119.55). Fairfax wins two categories: in-ground pools, where its flat $93.52 beats DC's $260 + 10% Enhanced total (Fairfax saves $192.48), and per-square-foot new single-family home construction, where Fairfax's $0.15/sq ft wood-frame rate ($336.00 at 2,000 sq ft) beats DC's $0.03/cubic foot rate ($532.40) at standard 8-ft ceilings.
The two jurisdictions price the two project categories on different bases. DC's alteration tier formula caps the marginal cost at 2% of declared construction value (Tier 3) plus a flat 10% Enhanced Fee. Fairfax charges 3%, then adds the 2% state levy and a 10% technology surcharge on the permit fee - effective rate 3.36% for a typical alteration. DC wins on alterations because its marginal rate is lower. For new construction, Fairfax uses per-square-foot pricing ($0.15/sq ft for wood frame) while DC uses per-cubic-foot pricing ($0.03/cu ft). At standard 8-ft ceilings, DC's cubic-foot rate works out to ~$0.24/sq ft - higher than Fairfax's $0.15, and Fairfax's 12% add-ons ($0.168 per sq ft all-in) still leave it well below DC. Fairfax wins on per-sq-ft new construction.
DC does not bill a separate flat plan review fee for first-pass residential alterations. Plan review is built into the alteration tier formula. Repeat Technical Review applies if plans are rejected and resubmitted: $65 + 10% Enhanced = $71.50 for single-family residential. Fairfax County collects a plan review filing fee of 50% of the building permit fee at application, but under County Code 61-1-3(d)11 every fee paid at application is credited toward the full permit fee at issuance - a deposit that changes when you pay, not how much (non-refundable if the application expires). The cost gap between DC and Fairfax for typical alterations comes from Fairfax's 3% rate and 10% technology surcharge, not from plan review.
DC's Enhanced Fee is 10% on every fee on the DOB schedule - permit, plan review, Green Building Fee, and trade permits. Virginia's state levy is 2% on the building permit fee, and Fairfax adds its own 10% technology surcharge on the same base (Appendix Q Part III). DC's all-in cost is still lower for most projects because DC's base permit fee is so much smaller. For a $30,000 alteration: DC's 10% applies to $630 = $63 plus $42.90 on the Green Building Fee = $105.90 in surcharges total, vs Fairfax's 2% levy ($18) plus 10% technology surcharge ($90) on the $900 permit = $108 in surcharges. Fairfax carries slightly more in dollars ($108 vs $105.90) but less as a share of its base fee (12% vs about 17%).
DC's Green Building Fee is a separate component that applies to alterations $1,001 and above and to new construction. For alterations $1,001-$1,000,000, the fee is 0.13% of declared construction value. For alterations over $1,000,000, the fee is $1,300 + 0.0065% of construction value over $1,000,000. For new construction, the fee is $0.002 per square foot. The Green Building Fee carries its own 10% Enhanced Fee on top of the base. Fairfax does not have an analogous fee. The Green Building Fee adds about $42.90 to a $30,000 alteration in DC, $21.45 to a $15,000 deck. Pools and flat-fee project types (sheds, fences, awnings) do not pay the Green Building Fee.
No - trade permits are filed separately in both jurisdictions. DC charges per outlet/fixture/equipment unit with the 10% Enhanced Fee on top. Minimum electrical permit fee in DC is $20 + 10% = $22.00. A typical kitchen remodel with new circuits, a relocated sink, and an HVAC change needs an electrical permit, plumbing permit, and mechanical permit on top of the building permit. Fairfax charges trade permits tiered by amperage (electrical), fixture count (plumbing), and zone count (HVAC), with a $141.75 minimum per trade permit plus the 2% state levy and 10% technology surcharge (a residential alteration electrical permit is $158.77 all-in). For a typical kitchen alteration, trade permits add $200-$600 in either jurisdiction depending on scope.
Fairfax County waives the building permit fee for solar panels ($0), though a permit is still required. DC charges $33 + 10% Enhanced = $36.30 for residential solar systems up to 15 kW under the Instant Permit program (launched February 17, 2026). Fairfax wins on solar permit cost. Trade permits for the electrical interconnection are separate in both jurisdictions.
Yes. DC: live page on dob.dc.gov/node/1620346 captured April 25, 2026. The DOB Fee Schedule is published as a live page (not a dated PDF), so the schedule reflects the current rates as published by DOB. Fairfax: Appendix Q LDS Fee Schedule PDF (amendment 05-26-Q, adopted May 5, 2026), effective July 1, 2026 (FY2027), verified September 18, 2026. Both jurisdictions use formal fee schedule documents with explicit sources. PermitPrice tracks both for re-verification.

Sources

Official .gov Sources - Both Jurisdictions Verified April 2026
  • Building Permit Fee Schedule - DC Department of Buildings Captured April 25, 2026 - DC DOB - Primary source for the alteration tier formula, Enhanced Fee, Green Building Fee, new construction cubic-foot pricing, and flat permit fees used in the DC worked examples Verified
  • Appendix Q LDS Fee Schedule - Fairfax County Appendix Q FY2027 (amendment 05-26-Q), effective July 1, 2026 - Fairfax County Land Development Services - Primary source for the 3% rate, $141.75 minimum, 10% technology surcharge (Part III), filing-fee deposit credited at issuance (County Code 61-1-3(d)11), flat $83.50 pool permit and per-square-foot new construction tier table (Table 1) used in the Fairfax worked examples. Verified September 18, 2026 Verified
Next Step

Dive into the full fee schedule for either jurisdiction or run the calculator.

Always verify current fees directly with the applicable building department before budgeting or filing. DC: DOB Building Permit Fee Schedule on dob.dc.gov/node/1620346 captured April 25, 2026 - call (202) 671-3500 to confirm. Fairfax: Appendix Q LDS Fee Schedule effective July 1, 2026 - call (703) 222-0801 to confirm. Both schedules are subject to change without notice.
Disclaimer: All fee information on PermitPrice is for informational purposes only and is not an official permit quotation. Actual permit fees are determined by the applicable building department at the time of application. Trade permits and supplemental fees are not included in any worked-example total above unless explicitly noted. Comparisons assume the same project scope and declared construction value in each jurisdiction; project classification (alteration vs new construction, deck vs alteration) can shift the fee in either jurisdiction.

Written by: Munib Ur Rehman

Data verified against official fee schedule documents.