Renovating a bathroom in a Manhattan high-rise or a Brooklyn brownstone isn’t just about picking out the perfect fluted vanity or Zellige tile. In New York City, the real “gut renovation” happens on paper before a single sledgehammer is swung.
At Koalaty Bath, we’ve seen it all—from “Wet-Over-Dry” denials to insurance stalemates. We know that for NYC homeowners, the biggest hurdle isn’t the budget; it’s the Alteration Agreement.
In 2026, the rules have changed. Here is your definitive guide to navigating the board approval process and getting your project from “pending” to “permitted.”
Inside This Guide: Navigating NYC Compliance
The 2026 Legislative Shift: What is NYC Int 1120-B?
For years, NYC homeowners were at the mercy of “black hole” board reviews. You would submit your plans and wait months for a response. As of 2026, the landscape has shifted thanks to Int 1120-B.
This legislation was designed to bring transparency to the renovation process. Key takeaways for your 2026 remodel include:
- The 45-Day Rule: Boards are now encouraged to provide a standardized list of requirements and issue an initial decision within 45 days of a complete submission.
- Standardized Checklists: Buildings are moving toward uniform alteration agreements to reduce legal back-and-forth.
Pro Tip: Even with these new laws, a “complete submission” is the key. If you miss one insurance rider, the 45-day clock resets.
Navigating the “Wet-Over-Dry” Rule of Your NYC Co-op Alteration Agreement
The most common reason for a bathroom layout rejection in NYC is the “Wet-Over-Dry” policy. Most Co-op and Condo boards prohibit placing a “wet” zone (your bathroom or kitchen) over a neighbor’s “dry” zone (their bedroom or living room).
Also on the blog— What is a Wet Room Bathroom: Costs, Pros & Cons
Why Boards Are Stricter in 2026
With the rise of high-end, luxury renovations, the potential for water damage has increased. Boards now prioritize “Leak Mitigation” over aesthetics.
| Requirement | What the Board Looks For | Koalaty Bath Solution |
| Waterproofing | ANSI-standard membranes (e.g., Schluter) | We provide a 5-year “No-Leak” guarantee on all membrane installs. |
| Leak Detection | Smart sensors & auto-shutoff valves | We install Moen Flo or Phyn systems as standard. |
| Plumbing Stacks | Evidence of stack integrity | We perform pre-inspections of the building’s branch lines to prevent surprises. |
The “Board-Ready” Contractor Checklist
When your Board reviews your application, they aren’t looking at your design—they are looking at your contractor’s paperwork. If your contractor isn’t “NYC-Approved,” your project is dead on arrival. Be sure the contractor meets the following requirements for your NYC co-op alteration agreement.
1. The Insurance “Power Three”
NYC buildings have some of the highest insurance requirements in the country. To get approved, your contractor must provide:
- General Liability: Typically $1M per occurrence / $2M aggregate.
- Workers’ Compensation: Proof of NYS-compliant coverage.
- Umbrella Policy: Most luxury buildings in 2026 now require a $5M+ umbrella to protect the building against structural claims.
2. The Certificate of Insurance (COI)
The COI must name the Co-op Corporation and the Managing Agent as “Additional Insured.” At Koalaty Bath, we have a dedicated compliance team that handles COI generation directly with your building’s management to ensure there are no typos that delay your start date.
3. Lead-Safe Certification
For any building built before 1978 (which is most of NYC), the EPA’s RRP rule is strictly enforced. Your contractor must be EPA Lead-Safe Certified.
Also on the blog— 7 NYC Bathroom Remodeling Trends for 2026: Designing for Small Spaces & Co-op Boards
Your Step-by-Step Approval Timeline
| Phase | Timeline | Action Item |
| 1. Preparation | 2 Weeks | Gather the building’s Alteration Agreement and House Rules. |
| 2. Design & Filing | 3-4 Weeks | Koalaty Bath creates architectural drawings and DOB filings. |
| 3. Submission | 1 Day | Submit the complete package to the Managing Agent. |
| 4. Board Review | 4-6 Weeks | The building’s engineer reviews the plans (Int 1120-B compliance). |
| 5. Approval | 1 Week | Sign the Alteration Agreement and post your security deposit. |
Also on the blog— 5 Layout Hacks for 40-Square-Foot NYC Bathrooms (2026 Edition)
Frequently Asked Questions (FAQ)
What is the 30% rule in remodeling?
In the context of NYC co-ops and condos, the “30% rule” often refers to the threshold for building-wide infrastructure triggers. If your renovation affects more than 30% of a specific system (like electrical load or plumbing stacks) or if the total cost exceeds a certain percentage of the apartment’s value, the building may require more extensive filings or even building-wide upgrades. Additionally, some boards limit “wet-over-dry” expansions to no more than 30% of the original footprint.
How much does it cost to remodel a bathroom in NYC in 2026?
For a standard 5×8 NYC bathroom, a professional gut renovation typically starts at $25,000 to $35,000. Luxury renovations involving high-end stone, steam showers, and plumbing relocation often range from $45,000 to $65,000+. These prices include the high cost of NYC labor, insurance, and the logistical fees associated with co-op board approvals.
Is it worth buying a co-op in NYC?
Yes, particularly for long-term residents. While the renovation process (the Alteration Agreement) is more rigorous than in a condo, co-ops often offer a lower purchase price and more stable community rules. In 2026, the new transparency laws (like Int 1120-B) have made owning and renovating a co-op much less intimidating than in years past.
Is $10,000 enough for a bathroom remodel in NYC?
In 2026, $10,000 is generally considered a “refresh” budget rather than a remodel budget. In NYC, this amount would cover cosmetic updates like replacing a vanity, faucet, and lighting, and perhaps a professional regrouting. However, a full gut renovation—which includes plumbing, tiling, and board-required waterproofing—cannot be completed for $10,000 due to the high cost of permits and specialized NYC labor.
Why Koalaty Bath is the NYC Choice
We don’t just build beautiful bathrooms; we build compliant ones. We understand that your home is your greatest asset, and your neighbor’s peace of mind is just as important as your new steam shower.
Our “Board-First” approach means we handle the heavy lifting:
- Liaising with your Managing Agent.
- Managing NYC DOB NOW stakeholder filings.
- Ensuring every plumbing move is compliant with “Wet-Over-Dry” policies.
Ready to stop dreaming and start filing?
Disclaimer: While we are experts in NYC construction, you should always consult with your building’s specific Alteration Agreement and your legal counsel before signing binding documents.
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