DC Solar Permit Cost (2026)
Residential solar (photovoltaic) permit fees in Washington, DC, pulled from the DC Department of Buildings (DOB) Building Permit Fee Schedule at dob.dc.gov (live schedule captured April 2026 - DC publishes the schedule on a single live page, not a dated PDF). DC residential solar is eligible for the DOB Instant Permit program, which launched February 2026: a flat $33 base fee plus the universal 10% DOB Enhanced Fee equals $36.30 all-in for one- and two-family PV systems up to 15 kW. The Instant Permit fee is flat regardless of system size up to the 15 kW cap, so a 4 kW system and a 14 kW system both pay $36.30. Systems larger than 15 kW, or not eligible for the Instant Permit, file a standard permit (alteration tier formula on declared construction cost) plus a separate electrical permit; those readers should use the calculator and the DC jurisdiction page. There is no DC equivalent of the Virginia 2% state levy because DC is a federal district, not part of any state - the 10% DOB Enhanced Fee is the only universal surcharge. The DC electrical trade permit minimum is $22; an EV or solar interconnection that files as an electrical permit is itemized separately. The headline residential figure for solar via the Instant Permit is $36.30.
This guide covers: Washington, DC residential solar (PV) permit fees as published in the DC Department of Buildings (DOB) Building Permit Fee Schedule on dob.dc.gov (live schedule captured April 2026). Coverage includes the DOB Instant Permit path for one- and two-family residential solar (flat $33 base fee, launched February 2026); the universal 10% DOB Enhanced Fee applied to all DOB fees; the resulting all-in figure of $36.30 for systems up to 15 kW; the 15 kW Instant Permit size cap and what happens above it; and how DC's flat Instant Permit approach contrasts with the separate electrical permit charged by neighboring Virginia jurisdictions. DC requires a DOB permit for every residential solar installation.
This guide does NOT cover: The equipment cost (panels, inverter, racking, conduit), installation labor, or the Pepco interconnection process and any utility interconnection fees - the permit fee is a small fraction of total project cost; structural or electrical engineering design fees where a stamped plan is required; the standard-permit and separate electrical-permit pricing for systems above the 15 kW cap (those are priced on declared construction cost plus an itemized electrical permit - use the calculator and the DC page, and verify with DOB); EV charger or battery-storage permits, which file as their own electrical scope (trade-permit minimum $22); zoning, setback, or historic preservation review (HPRB approval may be required before permit application for any work visible from a public street in a DC historic district). Permit fees are DC charges only.
Note on the Enhanced Fee: Every DOB fee carries a 10% Enhanced Fee on top of the base amount per the fee schedule. The Enhanced Fee is DC's automation and technology surcharge equivalent and applies to building permits, plan review, supplemental permits, and trade permits. For a residential solar Instant Permit the base fee is $33.00 and the Enhanced Fee is $3.30, yielding $36.30 all-in. The Enhanced Fee is mandatory and not negotiable.
Note on the 15 kW Instant Permit cap (disclosed): The flat $36.30 figure applies only to one- and two-family residential PV systems that qualify for the Instant Permit program, which is capped at 15 kW. A system above 15 kW, or one that does not otherwise qualify, is not priced at the flat $36.30 - it files a standard permit (alteration tier formula on declared construction cost) plus a separate electrical permit (trade-permit minimum $22). This guide does not invent a single number for above-cap systems because the cost depends on declared construction value and electrical scope; confirm the correct path and pricing with DOB at filing.
A Washington, DC residential solar permit costs $36.30 - a flat $33 Instant Permit fee plus the universal 10% DOB Enhanced Fee - for one- and two-family PV systems up to 15 kW. The DOB Instant Permit program launched in February 2026, and the fee is flat regardless of system size up to the 15 kW cap, so a 4 kW and a 14 kW system both pay $36.30. Systems larger than 15 kW, or not eligible for the Instant Permit, file a standard permit (priced on declared construction cost) plus a separate electrical permit (trade-permit minimum $22) - not the flat $36.30. There is no Virginia 2% state levy because DC is a federal district; the 10% Enhanced Fee is the only universal surcharge. The permit fee is a DC charge only - it does not include panels, inverter, labor, or Pepco interconnection.
- DC residential solar uses the DOB Instant Permit program: a flat $33 base fee plus the universal 10% DOB Enhanced Fee equals $36.30 all-in, for one- and two-family PV systems up to 15 kW. The program launched February 2026.
- The Instant Permit fee is flat - it does not scale with system size up to the 15 kW cap. A 4 kW system and a 14 kW system both pay the same $36.30 ($33 base + $3.30 Enhanced).
- Systems above 15 kW (or otherwise not Instant-Permit-eligible) file a standard permit on declared construction cost plus a separate electrical permit (trade-permit minimum $22) - they are not priced at the flat $36.30. Use the calculator and the DC page, and verify with DOB.
- Every DC permit fee carries the universal 10% DOB Enhanced Fee. DC has no Virginia state levy because it is a federal district, not part of any state, and operates under DCMR Title 12-A. The 10% Enhanced Fee is the only universal surcharge on the solar permit.
- Permit fees are DC charges only. The $36.30 does not include equipment (panels, inverter, racking), installation labor, or the Pepco interconnection process - those are separate costs handled outside the DOB permit.
- Source: the figures above come from the DOB Building Permit Fee Schedule on dob.dc.gov, a live page (no stamped effective date) captured April 2026 and verified May 2026. Confirm current rates and Instant Permit eligibility with DOB before filing.
DC Residential Solar Permit Fee Components
DC's residential solar permit fee, via the Instant Permit program, has just two components: the flat $33.00 Instant Permit base fee, and the universal 10% DOB Enhanced Fee applied to all DOB fees. Because the Instant Permit base is flat and the Enhanced Fee is a fixed percentage of that base, the all-in fee is the same $36.30 for every qualifying residential system up to 15 kW. The breakdown below shows the component math.
| Component | Amount | How It Is Calculated |
|---|---|---|
| Instant Permit base fee | $33.00 | DOB Instant Permit, residential PV up to 15 kW |
| 10% DOB Enhanced Fee | $3.30 | Universal 10% surcharge on every DC permit fee |
| All-in residential solar permit | $36.30 | $33 + $3.30 Enhanced |
DOB Building Permit Fee Schedule, Section a (Instant Permit), captured April 2026. No Virginia state levy applies (DC is a federal district). The 10% Enhanced Fee is required on every DOB fee. This breakdown applies to one- and two-family residential PV systems up to 15 kW that qualify for the Instant Permit. Systems above 15 kW file a standard permit (priced on declared construction cost) plus a separate electrical permit (trade-permit minimum $22) and are not covered by this flat-fee component breakdown.
Worked Examples - Real Solar Projects in Washington DC
DC's residential solar permit fee via the Instant Permit is a flat $33 base plus the 10% DOB Enhanced Fee, for systems up to 15 kW. The first two examples below show that the flat $36.30 applies regardless of system size within the cap. The third example illustrates an above-cap system, which is priced differently - on declared construction cost plus a separate electrical permit - and is clearly labeled as not the flat $36.30.
A homeowner installs a typical 8 kW rooftop photovoltaic system on a single-family home. The system is well under the 15 kW cap, so it qualifies for the DOB Instant Permit program.
- System size: 8 kW (within the 15 kW Instant Permit cap)
- Instant Permit base fee: $33.00
- 10% DOB Enhanced Fee: $3.30
- Total: $36.30 all-in
Note: this is the verified Instant Permit rate and the headline $36.30 figure used throughout this guide. The $36.30 covers the DOB permit only - it does not include the panels, inverter, racking, installation labor, or the Pepco interconnection process. The same 8 kW / 200A residential system would run about $385.56 all-in in Fairfax County, which waives the building fee but charges a separate electrical permit.
A larger single-family home installs a 14 kW photovoltaic system - close to the 15 kW Instant Permit ceiling but still within it, so it qualifies for the same Instant Permit path.
- System size: 14 kW (still within the 15 kW Instant Permit cap)
- Instant Permit base fee: $33.00
- 10% DOB Enhanced Fee: $3.30
- Total: $36.30 all-in
Note: the Instant Permit fee is flat regardless of size up to 15 kW, so this 14 kW system pays exactly the same $36.30 as the 8 kW system in Example 1. There is no per-kW or per-dollar scaling within the cap - this is the key feature of DC's Instant Permit approach to residential solar.
A large home or small multi-unit property installs a 20 kW photovoltaic system. Because it exceeds the 15 kW Instant Permit cap, it is not eligible for the flat $36.30 path and follows the standard permit route instead.
- System size: 20 kW (above the 15 kW Instant Permit cap)
- Permit path: standard permit (alteration tier formula on declared construction cost) plus a separate electrical permit (trade-permit minimum $22)
- Total: priced on declared construction cost plus the itemized electrical permit - not the flat $36.30
Note: this guide does not publish a single number for above-cap systems because the cost depends on the declared construction value and the electrical scope, both of which vary by project. Use the permit fee calculator and the DC permit fee page to estimate the standard-permit and electrical-permit components, and verify the correct path and pricing directly with DOB before budgeting.
Calculate Your Washington DC Solar Permit
For a residential system up to 15 kW, the math is simple and flat: $33 Instant Permit base plus the 10% DOB Enhanced Fee equals $36.30 all-in, no matter the system size within the cap. There is nothing to scale - every qualifying one- and two-family PV system pays the same $36.30. For systems above the 15 kW cap, the cost is no longer flat: those file a standard permit priced on declared construction cost plus a separate electrical permit, so use the PermitPrice calculator and the DC jurisdiction page to estimate those components. Use the calculator for above-cap and standard-permit project types, and this page for the flat residential solar Instant Permit fee.
Rule of thumb for DC residential solar: a one- or two-family PV system up to 15 kW is a flat $36.30 all-in via the DOB Instant Permit ($33 base + $3.30 Enhanced). Confirm Instant Permit eligibility with DOB at filing, and remember that a system above 15 kW is priced on declared construction cost plus a separate electrical permit, not the flat $36.30.
Open the Permit Fee CalculatorElectrical Permits, Above-Cap Systems & Exclusions
Electrical permits (covered for small systems, separate for larger ones): A one- or two-family residential solar system up to 15 kW is covered by the Instant Permit at $36.30 - you do not file a separate electrical permit for the basic residential scope. Larger or non-eligible systems, however, need a separate electrical permit, which is itemized and carries a trade-permit minimum of $22 plus the 10% Enhanced Fee. An EV charger or battery-storage addition also files as its own electrical scope. Confirm with DOB whether your specific scope is covered by the Instant Permit or needs a separate electrical filing.
Above-cap systems (a different permit path): The flat $36.30 Instant Permit applies only to residential PV up to 15 kW. A system above 15 kW, or one that does not qualify for the Instant Permit, files a standard permit - priced under the alteration tier formula on declared construction cost - plus a separate electrical permit. This is not the flat $36.30, and the total depends on the declared value and the electrical scope. Use the calculator and the DC page to estimate, and verify the correct path with DOB before filing.
Scope exclusions: The Instant Permit fee is the DOB permit only. It does not include the equipment cost (panels, inverter, racking, conduit), installation labor, or the Pepco interconnection process and any utility interconnection fees; structural or electrical engineering design fees where a stamped plan is required; or trade permits for EV chargers or battery storage filed under their own scope, each with its own 10% Enhanced Fee. Historic preservation review (HPRB) is a separate process required before filing for properties in DC historic districts where the array is visible from a public street. Confirm all scope with DOB at 202-671-3500 or through the Scout portal at scout.dob.dc.gov before budgeting.
Solar Permit Cost: Washington DC vs Fairfax County
DC and Fairfax County price residential solar permits with structurally different models, so a direct dollar comparison needs a scope note. DC uses a flat Instant Permit for small residential systems up to 15 kW; Fairfax County waives the building permit fee entirely ($0) but charges a separate electrical permit, which is where the real cost lands. The figures below use a typical 8 kW / 200A residential system.
| Jurisdiction | Fee Method | Solar Permit All-In |
|---|---|---|
| Washington, DC | Instant Permit flat $33 + 10% Enhanced | $36.30 (residential up to 15 kW) |
| Fairfax County | Building permit $0 (waived) + electrical permit ($378 + 2% levy) | $385.56 (typical 8 kW / 200A) |
DC's $36.30 Instant Permit covers the small-system residential scope; Fairfax waives the building fee but charges a separate electrical permit (the real cost). The models are not directly equivalent: DC's flat fee bundles the small residential solar scope into one Instant Permit, while Fairfax separates the waived building fee from a value-and-amperage-based electrical permit plus the Virginia 2% state levy. DC carries no Virginia state levy because it is a federal district. See the full picture in the Virginia Solar Permit Cost Guide.
For a full DC permit fee breakdown across all residential project types, see the DC jurisdiction page.
Frequently Asked Questions
Sources
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DOB Building Permit Fee Schedule - Washington DC Department of Buildings Captured April 2026 - Section a Instant Permit ($33 + 10% Enhanced) and trade-permit fees. Verified May 2026. No stamped effective date - DC publishes the schedule on a single live page, re-verified quarterly.
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DC Department of Buildings - Permits Accessed May 2026 - DOB permitting portal and Instant Permit program information, including the February 2026 Instant Permit launch, the filing and issuance process, and the relationship between DOB private-property permits and other District agency requirements.
Calculate your DC permit cost, see all DC fee categories, or compare solar permit fees across jurisdictions.