Building permits in Kings County, New York
Find the right authority before you build. Kings County permitting follows New York law — here is exactly who issues the permit and where to start.
Cities issue permits
NYC Department of Buildings (DOB)
Kings County is coextensive with the Brooklyn borough of New York City. There is no separate county permitting agency — the NYC Department of Buildings (DOB) issues all building permits for Brooklyn through its Brooklyn Borough Office. Determine your permit type and submit through DOB’s online or in-person process.
Open the official permit portal →
Use NYC DOB’s “DOB NOW” portal to apply for most residential permits.
Check a home project's permit in Kings County, New York
Select a project to see its New York permit rule. Whether the county or your city issues it depends on incorporation status — see the authority note above.
New York
Exact permit fees are set by the local building department. WikEst shows the published or code-based range where one exists, linked to its official source — verify the final amount at the source before budgeting.
🏠 Accessory Dwelling Unit (ADU) permit fee in New York
Permit requiredRestrictedcity authority
Permit fee range
Permit and plan-review fees set by the city. Verify with the local building department.
Typical timeline
Varies by city; NYC ADU filings may take several weeks.
Setback
Per local zoning.
Exempt if
Allowed only where the local law permits.
Exempt criteria: None — where allowed, ADUs require a permit.
New York has no statewide by-right ADU mandate; ADUs are allowed where local law permits (e.g., the NYC ADU program, Buffalo). Zoning applies.
Official sources: NYC Department of Buildings — Acquire Permits · City of Buffalo — Permit & Inspection Services
Representative cities for New York: New York City, Buffalo.
All 20 project fee ranges in New York
Official-source ranges where published; “By local jurisdiction” means no flat fee is published and the amount is set case by case.
| Project | Permit? | Authority | Fee range | Go / no-go |
|---|---|---|---|---|
| 🏠 Accessory Dwelling Unit (ADU) | yes | city | Permit and plan-review fees set by the city. Verify with the local building department. | restricted |
| 🪵 Deck / Porch | conditional | city | Set by the city — typically a flat plus valuation-based fee. Verify with the city building department. | allowed |
| 🧱 Fence / Wall | conditional | city | Usually no building permit under local height limits; zoning setback rules apply. Verify locally. | allowed |
| 🛖 Shed / Outbuilding | conditional | city | No fee under the exemption; a permit fee applies if over the threshold. | allowed |
| 🪜 Basement Finish | yes | city | Valuation-based building permit fee. Verify with the city building department. | allowed |
| 🚗 Garage / Carport | yes | city | Valuation-based fee. Verify with the city building department. | allowed |
| ☀️ Rooftop Solar PV | yes | city | Electrical permit fee set by the city. Verify with the city building department. | allowed |
| 🌡️ HVAC Replacement | yes | city | Mechanical permit fee set by the city. Verify with the city building department. | allowed |
| 🍳 Kitchen Remodel | yes | city | Building + electrical + plumbing permit fees. Verify with the city building department. | restricted |
| 🛁 Bathroom Remodel | yes | city | Building + plumbing + electrical fees. Verify with the city building department. | restricted |
| 🏗️ Room Addition | yes | city | Valuation-based building permit; impact fees may apply. Verify with the city building department. | allowed |
| 🪟 Window / Door Replacement | conditional | city | Permit fee if changing the opening; in-kind swap is often exempt. | allowed |
| 🏘️ Roof Replacement | conditional | city | Roofing permit fee set by the city. Verify with the city building department. | allowed |
| 🅿️ Driveway / Parking Pad | conditional | city | Private flatwork generally needs no building permit; curb cut / right-of-way needs a separate permit. | allowed |
| 🏊 Swimming Pool / Spa | yes | city | Building permit + electrical; fee set by the city. Verify with the city building department. | allowed |
| 🧱 Retaining Wall | conditional | city | No fee under the exemption; a permit applies if over the threshold. | allowed |
| 💥 Demolition / Teardown | yes | city | Demolition permit fee set by the city/county building department; verify locally. | allowed |
| 🚰 Septic System | yes | county | Septic permit fees set by the local (county) health department; verify locally. | allowed |
| 🔌 EV Charger | conditional | city | Electrical permit fee set by the city; verify locally. | allowed |
| ⚡ Standby Generator | yes | city | Electrical (and often mechanical/gas) permit fee set by the city; verify locally. | allowed |
Permit cheat-sheet (New York rules)
| Project | Permit? | Authority | Typical fee | Timeline | Go / No-Go | Key notes |
|---|---|---|---|---|---|---|
| 🏠 Accessory Dwelling Unit (ADU) | Permit required | city | Permit and plan-review fees set by the city. Verify with the local building department. | Varies by city; NYC ADU filings may take several weeks. | Restricted | New York has no statewide by-right ADU mandate; ADUs are allowed where local law permits (e.g., the NYC ADU program, Buffalo). Zoning applies. Exempt: Allowed only where the local law permits. |
| 🪵 Deck / Porch | Conditional | city | Set by the city — typically a flat plus valuation-based fee. Verify with the city building department. | 1–4 weeks (NYC files through DOB NOW). | Generally allowed | Attached or raised decks need a permit; NYC requires a DOB filing. Exempt: Decks >30 in above grade require a permit (RCNYS R105). |
| 🧱 Fence / Wall | Conditional | city | Usually no building permit under local height limits; zoning setback rules apply. Verify locally. | Same day / Over-the-Counter where required. | Generally allowed | Height/front-yard rules set by local zoning and HOA covenants. Exempt: Typically no building permit under local height limits (zoning). |
| 🛖 Shed / Outbuilding | Conditional | city | No fee under the exemption; a permit fee applies if over the threshold. | Same day / Over-the-Counter where required. | Generally allowed | Larger or serviced sheds need a building permit. Exempt: One-story detached accessory structure ≤120 sq ft is exempt (RCNYS R105.2). |
| 🪜 Basement Finish | Permit required | city | Valuation-based building permit fee. Verify with the city building department. | 2–6 weeks. | Generally allowed | Finishing a basement requires egress (RCNYS R310) and permits; a sleeping room needs a code-compliant egress window. Exempt: N/A |
| 🚗 Garage / Carport | Permit required | city | Valuation-based fee. Verify with the city building department. | 2–8 weeks. | Generally allowed | A new garage requires a building permit under the RCNYS / NYC Building Code. Exempt: N/A |
| ☀️ Rooftop Solar PV | Permit required | city | Electrical permit fee set by the city. Verify with the city building department. | 2–4 weeks (NYC files through DOB NOW). | Generally allowed | Rooftop PV requires an electrical permit; NYC files through DOB NOW. Exempt: N/A |
| 🌡️ HVAC Replacement | Permit required | city | Mechanical permit fee set by the city. Verify with the city building department. | 1–2 weeks. | Generally allowed | Furnace, AC, or heat-pump replacement requires a mechanical permit and inspection. Exempt: N/A |
| 🍳 Kitchen Remodel | Permit required | city | Building + electrical + plumbing permit fees. Verify with the city building department. | NYC: ALT2 review, several weeks. | Restricted | NYC: kitchen/bath renovation needs an ALT2 permit filed by a NYS-licensed PE or RA; upstate follows similar building-permit rules. Exempt: N/A |
| 🛁 Bathroom Remodel | Permit required | city | Building + plumbing + electrical fees. Verify with the city building department. | NYC: ALT2 review, several weeks. | Restricted | NYC: bathroom renovation needs an ALT2 permit filed by a NYS-licensed PE or RA; fixture-only swaps may be exempt. Exempt: N/A |
| 🏗️ Room Addition | Permit required | city | Valuation-based building permit; impact fees may apply. Verify with the city building department. | 3–8 weeks. | Generally allowed | Expanding the footprint requires full plan review; NYC uses New Building / ALT1 filings. Exempt: N/A |
| 🪟 Window / Door Replacement | Conditional | city | Permit fee if changing the opening; in-kind swap is often exempt. | Same day / Over-the-Counter where required. | Generally allowed | Enlarging openings or changes to means of egress need a permit (NYC PE/RA filing). Exempt: In-kind same-size replacement generally needs no permit. |
| 🏘️ Roof Replacement | Conditional | city | Roofing permit fee set by the city. Verify with the city building department. | 1–3 weeks. | Generally allowed | Re-roofing generally requires a permit; NYC requires a roofing permit. Minor repair may be exempt. Exempt: N/A |
| 🅿️ Driveway / Parking Pad | Conditional | city | Private flatwork generally needs no building permit; curb cut / right-of-way needs a separate permit. | Varies. | Generally allowed | A curb cut or work in the public right-of-way requires a separate permit from the city / public works. Exempt: N/A |
| 🏊 Swimming Pool / Spa | Permit required | city | Building permit + electrical; fee set by the city. Verify with the city building department. | 3–8 weeks. | Generally allowed | Pools require a permit and barrier per RCNYS R328 (barrier, alarms, entrapment protection). Exempt: N/A |
| 🧱 Retaining Wall | Conditional | city | No fee under the exemption; a permit applies if over the threshold. | 2–4 weeks if required. | Generally allowed | Taller or surcharge-supporting walls need design and a permit. Exempt: Retaining walls ≤4 ft (bottom of footing to top), not supporting a surcharge, are exempt (RCNYS R105.2). |
| 💥 Demolition / Teardown | Permit required | city | Demolition permit fee set by the city/county building department; verify locally. | — | Generally allowed | A full teardown or major strip-out requires a demolition (building) permit from the city or county building department under the Uniform Code / Residential Code of NY State. Demolition permits commonly require utility disconnects and, for older homes, asbestos/lead clearance. NYC files demolition through DOB NOW. |
| 🚰 Septic System | Permit required | county | Septic permit fees set by the local (county) health department; verify locally. | — | Generally allowed | New or replacement onsite wastewater (septic) systems require a permit from the local county health department under NYSDOH Appendix 75-A. Engineered design and a site/percolation evaluation are typically required; the local health department is the permitting authority. |
| 🔌 EV Charger | Conditional | city | Electrical permit fee set by the city; verify locally. | — | Generally allowed | A home EV charging station needs an electrical permit (dedicated 240V circuit and wall unit) issued by the city under the Uniform Code. New York has no single statewide EV-permitting fast-track, so review time varies by city (NYC files through DOB NOW). Work must meet the NEC. |
| ⚡ Standby Generator | Permit required | city | Electrical (and often mechanical/gas) permit fee set by the city; verify locally. | — | Generally allowed | A permanently installed standby generator with a transfer switch and fuel (gas/propane) line requires electrical and often mechanical/gas permits, plus inspection. Setback, noise, and carbon-monoxide rules may apply, and HOAs may restrict installation. Verify with the city building department. |
Frequently asked questions
Who issues building permits in Kings County, New York?
NYC Department of Buildings (DOB) is the permitting authority for Kings County. Permits are issued by the incorporated cities; the county handles only unincorporated areas. Start at the official portal linked above.
Do I go to the county or my city for a building permit in Kings County?
Permits are issued by the incorporated cities; the county handles only unincorporated areas.
What home projects need a permit in Kings County?
The same project types shown in the cheat-sheet above (ADU, deck, fence, shed, solar, and more) — rules follow New York state law. Whether the county or your city issues it depends on your property's incorporation status.
How do I apply for a permit in Kings County?
Use the official permit portal linked above. Most offices accept online submissions; have your plans, site information, and contractor details ready before applying.