Board Approval
NYC Co-op & Condo HVAC Approval Guide
You can’t just buy a through-wall unit and have someone install it. In most NYC co-ops and condos, HVAC work requires board approval — and the approval process has its own timeline, paperwork, and requirements that can add weeks or months to your project.
All GuidesKnow Before You Start
Co-op vs Condo: Different Rules
In a co-op, you don’t own your apartment — you own shares in the corporation that owns the building. The board has broad authority over what you can and can’t do to “your” unit, including HVAC work. Anything that touches the building’s structure, exterior walls, electrical risers, or plumbing typically requires a formal alteration agreement.
In a condo, you own the unit itself, but the common elements (exterior walls, roof, hallways) belong to the condo association. HVAC work that only affects your unit interior may need just a notification, but anything that penetrates a common wall or goes through the roof requires condo board approval.
The practical difference: co-op boards tend to be stricter and slower. Condo approvals are often (but not always) faster. Either way, start the paperwork before you order equipment.
What the Board Wants to See
Every building is different, but most NYC co-op and condo boards require the same core package for HVAC alteration approval. Here’s what you should be prepared to submit:
1. Alteration Application
The building’s managing agent will provide the form. It covers what work you want to do, where, and with what equipment. Be specific: include the exact make and model of the unit, the sleeve size, electrical requirements, and whether any structural modification is involved. Vague applications get sent back for more information, which costs you weeks.
2. Contractor Information
Your contractor’s NYC Home Improvement License number, HVAC contractor license (if applicable), and business insurance certificates. Most boards require the contractor to carry at least $1 million in general liability and $1 million in workers’ compensation, naming the building and the managing agent as additional insured. Some buildings require $2 million or more.
3. Insurance Certificate (COI)
The Certificate of Insurance from your contractor, listing the building corporation (co-op) or condo association and the managing agent as additional insured parties. The COI must be current and cover the entire duration of the work. This is non-negotiable — no COI, no approval.
4. Equipment Specifications
Spec sheets or cut sheets for the exact equipment being installed. Boards want to verify the unit matches the building’s electrical capacity, fits the existing wall sleeve, and meets any noise or aesthetic requirements the building has. This is where having a specific product selected before you apply saves time.
5. DOB Permits (If Required)
Replacing an existing unit in an existing sleeve generally does not require a DOB work permit. But if you’re cutting a new wall opening, running new electrical circuits, or installing a system for the first time, a DOB permit may be required. Your contractor should know which scenario applies. When in doubt, ask the building’s managing agent — they deal with this regularly.
6. Alteration Agreement
For co-ops, the building’s attorney typically prepares an alteration agreement that you and the building sign. This document spells out who is responsible for what — during construction and after. It covers noise hours (most buildings restrict work to 9 AM – 5 PM weekdays), hallway protection, elevator reservations for material delivery, and restoration of common areas if damaged. Your attorney reviews it. Budget $500–$1,500 for legal review.
The Alteration Agreement: What It Actually Covers
The alteration agreement is the document that trips up most apartment owners. It’s a legal contract between you and the co-op corporation (or condo association) that governs the work. Here’s what to expect:
- Scope of work: Exactly what will be done, down to the specific equipment models. Changes to the scope after signing may require a new agreement.
- Work hours: Typically Monday through Friday, 9 AM to 5 PM. No weekends, no holidays, no exceptions. Some buildings allow 8 AM starts for quiet work (no drilling or hammering until 9).
- Security deposit: Many buildings require a refundable deposit ($500–$5,000) to cover potential damage to common areas during construction. You get it back after the work is inspected and approved.
- Indemnification: You agree to hold the building harmless for any damage or injury related to the work. This is why the contractor insurance requirement exists.
- Maintenance responsibility: The agreement usually states that you are responsible for maintaining and repairing the HVAC equipment going forward — and that any damage to the building caused by a failure of your system (like a condensate leak that damages the apartment below) is your liability.
Insurance Requirements: The Numbers
Insurance is the single most common reason for approval delays. Your contractor needs to carry and prove coverage before work begins:
| Coverage Type | Typical Minimum |
|---|---|
| General Liability | $1,000,000 – $2,000,000 |
| Workers’ Comp | $1,000,000 (statutory) |
| Umbrella / Excess | $1,000,000 – $5,000,000 (some buildings) |
| Additional Insured | Building corp + managing agent named |
Luxury co-ops on Park Avenue or Fifth Avenue may require $5 million or more in umbrella coverage. Ask the managing agent for the exact insurance requirements before your contractor gets the COI issued — getting it amended after the fact adds another week.
Realistic Timeline
If you’re replacing an existing through-wall unit with the same type (same sleeve, same electrical), many buildings treat it as a minor alteration. That can be as fast as 1–2 weeks for approval.
For new installations — cutting a new sleeve, installing a high-velocity system, or placing a condenser on the roof — expect the full process:
Total timeline for a new installation: 2 to 4 months from starting the application to having cold air. For a direct replacement: 2 to 4 weeks. If you want AC by summer, start the process in February or March. Starting in June means you’re sweating through July.
Tips That Actually Help
- Talk to the super first. The building superintendent knows what sleeve sizes your building has, what electrical capacity is available, and what the board has approved for other units. Five minutes with the super saves you weeks of guessing.
- Use a contractor the building knows. If other residents have recently done HVAC work, find out who they used. A contractor who already has an approved COI on file with the managing agent speeds things up considerably.
- Submit a complete application the first time. Incomplete applications go to the bottom of the pile. Include everything: contractor info, insurance, equipment specs, scope of work description, and any drawings or plans the building requests.
- Be specific about equipment. “I want to install a new AC” is not an application. “I want to replace the existing 1.5-ton through-wall condenser with an Aerosys TTWC-R18P21LX in the existing 36x19 sleeve using the existing dedicated 20-amp circuit” is an application that gets approved.
- Don’t skip the process. Some shareholders try to do HVAC work without board approval. If the building finds out (and they will — neighbors hear drilling, supers notice new equipment), you face fines, forced removal of the equipment, and a very uncomfortable relationship with your board.
For Property Managers and Managing Agents
If you’re managing a building that’s doing a whole-building HVAC replacement program, we work with managing agents regularly. We can provide bulk equipment quotes, staged delivery schedules matched to your installation timeline, and standardized spec sheets that simplify the approval process for all units in the building.
Browse our NCP product line for standard replacements, our Aerosys TTWC condenser lineup for buildings with 36x19 sleeves, or custom configurations for buildings with non-standard sleeve sizes.
Ready to Start the Process?
We can provide equipment spec sheets and cut sheets formatted for board submissions. Tell us your building and unit details, and we’ll get you the documentation you need for a smooth approval.