Renovating in NYC: Board Approval, DOB Permits, and Contractor Checks

A renovation can require approval from the building, New York City, or both. Permission from a co-op board or condo management does not replace a Department of Buildings permit, and a city permit does not waive the building's alteration agreement.

Separate cosmetic work from regulated work

Painting, plastering, installing cabinets, resurfacing floors, and certain non-structural repairs may not require a DOB permit. Work involving walls, plumbing, electrical systems, gas, structural elements, egress, occupancy, or fire protection often does. The exact scope matters more than the label “renovation.”

Before signing a contractor proposal, have a New York-licensed architect or professional engineer identify which filings and permits are required. If the plan depends on legalizing existing unpermitted work, address that separately rather than burying it inside a new project.

Read the building alteration agreement

Co-ops and condos commonly require an alteration application, drawings, contractor licenses, insurance certificates, deposits, work-hour rules, elevator protection, neighbor notices, and architect review. Some buildings restrict wet-over-dry layouts, moving kitchens, floor soundproofing, summer work, or the duration of construction.

Request the agreement before purchase when renovation is central to the deal. A technically possible layout may still be prohibited by building policy, and review fees or deposits can materially change the budget.

Verify the people doing the work

Check required Home Improvement Contractor licensing through NYC Department of Consumer and Worker Protection and verify trade licenses where electrical, plumbing, fire-suppression, or other regulated work is involved. The name on the contract, license, insurance, and permit should match the party actually responsible.

The contract should define scope, drawings, materials, change orders, payment milestones, cleanup, permits, inspections, lien handling, insurance, and responsibility for building fines. Avoid paying the full price before required inspections and closeout documents are complete.

Close the job, not just the construction site

At completion, collect signed permits, inspection results, letters of completion, equipment warranties, approved plans, and the building's deposit release. Confirm in DOB NOW or BIS that filed work is closed. Open permits can become the next owner's problem and can delay a future refinance or sale.

Official sources

• NYC DOB — Do I need a permit?: https://www.nyc.gov/site/buildings/property-or-business-owner/do-i-need-a-permit.page
• NYC DOB homeowner toolkits: https://www.nyc.gov/site/buildings/property-or-business-owner/tool-kits.page
• NYC Consumer and Worker Protection — contractor licensing: https://www.nyc.gov/site/dca/businesses/license-checklist-home-improvement-contractor.page

This article is general information. Confirm the property, building, and project with licensed design, legal, and construction professionals.