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What Is an ACP-5 and Why Does It Affect Your Mini Split Job?
If you are planning an ACP-5 mini split installation NYC project in a building constructed before April 1, 1987, you need an asbestos survey and a filed ACP-5 form before the Department of Buildings will issue your work permit. Full stop. No survey, no permit number, no install day.
The ACP-5 (Asbestos Assessment Report) is an official NYC DEP form completed, signed, and sealed by a DEP-certified asbestos investigator. It certifies one of three findings for your specific work area: the space contains no asbestos-containing material (ACM), any ACM present will not be disturbed by the planned work, or the ACM quantity is below DEP thresholds for a minor project (less than 10 sq ft or 25 linear ft of friable ACM). As of January 2026, ACP-5 forms must be filed digitally via DEP eFiling, paper submissions are no longer accepted.
Mini split installs in pre-war Park Slope brownstones, Astoria co-ops, and Harlem limestone buildings all fall under this rule. The age of the building is the trigger, not the size of the job.
Does a Mini Split Install Actually Trigger the ACP-5 Requirement?
Yes, whenever the install requires a DOB permit and touches a pre-1987 building. The practical question is which parts of a typical mini split scope disturb regulated materials.
A standard ductless install involves drilling a 3-inch line-set penetration through an exterior wall, mounting an indoor air handler (usually through wall anchors into plaster or drywall), and running electrical in walls or ceiling spaces. Each of those steps can contact asbestos-containing plaster, joint compound, pipe insulation, or wall construction materials common in pre-1987 stock. NYC building code explicitly lists alterations to HVAC systems that disturb existing finishes as a category requiring an asbestos survey.
The key distinction: if your contractor files a DOB alteration permit (required for most permitted mini split installs in NYC), the permit application will prompt an asbestos certification. DOB will not release the permit without a valid ACP-5 control number or an ACP-7 notification already on file.
High-risk penetration points in a typical mini split scope include:
- Exterior wall core drilling: Pre-1987 plaster, joint compound, and fireproofing are the most common ACM contact points.
- Pipe chases and utility cavities: Pipe lagging and boiler insulation in shared walls frequently contain ACM in brownstones and pre-war walk-ups.
- Interior wall anchor points: Older plaster-and-lath walls can contain ACM in the plaster base coat or joint compound.
- Window-adjacent mounting: Glazing compounds in pre-1987 windows can be ACM; work near window frames warrants sampling.
Low-risk (but not zero-risk) points include mounting on exposed brick or concrete masonry where no plaster was applied, though a certified investigator must confirm this in writing.
ACP-5 vs ACP-7: Which Form Will You Need?
The survey outcome determines the form. You cannot know in advance, that is the entire point of the inspection.
| Form | When It Applies | What Happens Next |
|---|---|---|
| ACP-5 | No ACM in work area, ACM present but will not be disturbed, or ACM quantity is a minor project (below 10 sq ft / 25 linear ft friable) | Filed with DEP for $47; DOB releases work permit; install proceeds |
| ACP-7 | ACM present above minor-project thresholds and will be disturbed by the scope of work | Licensed abatement contractor required; filed at least 7 calendar days before abatement; DEP review 3–10 business days; abatement completed before install |
The ACP-5 is the best-case outcome and the most common result for a targeted mini split install that avoids pipe chases and keeps penetrations minimal. An ACP-7 is triggered when, for example, the line-set route passes through a utility cavity lined with pipe lagging that tests positive for ACM above the minor-project threshold. If that happens, a licensed abatement contractor removes the material before your HVAC crew returns.
One misconception worth addressing directly: being told your building “is asbestos-free” by a prior owner, your co-op board, or a previous contractor does not satisfy the ACP-5 requirement. Only a current survey by a DEP-certified investigator, with lab results, produces a valid form that DOB will accept.
Who Orders and Pays for the ACP-5 in a Co-op, Condo, or Brownstone?
This is the question no asbestos-testing firm addresses, and it differs by building type.
| Building Type | Who Typically Orders the Survey | Who Typically Pays | Board Approval Needed First? |
|---|---|---|---|
| NYC co-op (shareholders) | Shareholder/unit owner (the permit applicant) | Unit owner | Yes, alteration agreement usually required before filing |
| NYC condo | Unit owner (the permit applicant) | Unit owner | Often yes, check offering plan and house rules |
| Single-family brownstone | Owner directly | Owner | No board; owner coordinates with HVAC contractor |
| Multi-family brownstone (landlord) | Building owner (permit applicant) | Building owner | No board; owner responsible for compliance |
In a co-op, the shareholder is the permit applicant and bears the cost of the survey and filing. The board does not order the ACP-5 on your behalf. Your alteration agreement will typically require you to submit a copy of the filed ACP-5 control number before work begins, so factor that into your timeline with building management. For questions about what co-op boards require alongside the permit paperwork, see our guide on mini split installation COI requirements for NYC co-op and condo boards.
What Does an ACP-5 Survey Cost, and How Long Does It Take?
Budget $250–$800 for a targeted residential asbestos survey covering the mini split work area; larger apartments or full-floor surveys can reach $1,200. NYC pricing runs roughly 15–25% above national averages because of local labor costs, building age, and city filing rules. The DEP filing fee under 15 RCNY §1-23 is $47.00, confirm this figure with your investigator, as it is set by city rule and applies at time of filing.
Typical turnaround:
- Survey appointment: 1–3 business days to schedule
- Lab results: 3–5 business days standard; 24-hour rush available at a premium
- ACP-5 filing and DEP review: Several business days after digital submission via eFiling
- DOB permit release: Once the ACP-5 control number is in the system, DOB can cross-reference it on your permit application within 1–3 business days
Total realistic window from “I need a survey” to “permit in hand”: 10–21 business days under normal conditions. If the survey finds ACM above minor-project thresholds and triggers an ACP-7, add abatement time, typically another 2–4 weeks before your HVAC crew can return.
If you are also coordinating a Con Edison electrical upgrade for the mini split circuit, note that the electrical and asbestos timelines run in parallel, not in sequence. See our breakdown of Con Edison electrical service upgrades for heat pump installs to understand how to overlap these tracks.
Common Mistakes to Avoid
- Assuming no permit means no ACP-5. Some contractors quote “permit-free” installs to skip this step. A DOB-permitted install is legally required for most mini splits in NYC apartments and co-ops; skipping the permit exposes you to stop-work orders and resale liability.
- Booking the install crew before the survey is filed. Schedule your survey before you lock in an install date. A 3-week permit delay with a crew already scheduled wastes money on rescheduling fees.
- Accepting a prior “asbestos-free” report. DEP requires a survey scoped to the current work area and current scope of work. A report from a prior renovation does not cover a new line-set penetration in a different wall.
- Using an uncertified inspector. Only a DEP-certified asbestos investigator credentialed under NYS Labor Law Article 32 can produce a valid ACP-5. A general home inspector or unlicensed contractor cannot sign or seal the form.
- Ignoring pipe chases on the line-set route. The penetration is not the only risk point. Any wall cavity the line set passes through must be included in the survey scope, especially in pre-war buildings with active or capped steam pipe risers.
- Not notifying the co-op board before ordering the survey. Most alteration agreements require board sign-off before any work, including survey work, begins inside the unit. Check your agreement before scheduling.
Frequently Asked Questions
Does every mini split install in a pre-1987 NYC building require an ACP-5?
Any mini split install that requires a DOB work permit in a building constructed before April 1, 1987 requires an asbestos survey and an ACP-5 (or ACP-7, depending on findings) before the permit is issued. If a DOB permit is not required for the specific scope of work, the ACP-5 is not triggered, but most permitted mini split installs in NYC apartments, co-ops, and condos do require a permit.
What is the difference between an ACP-5 and an ACP-7?
ACP-5 is filed when the survey finds no ACM in the work area, ACM that will not be disturbed, or ACM below the minor-project threshold (less than 10 sq ft or 25 linear ft of friable material). ACP-7 is filed when ACM above those thresholds will be disturbed and licensed abatement is required before work proceeds. The survey outcome determines which form applies; you cannot choose.
Who pays for the asbestos survey in a NYC co-op mini split install?
The unit owner (shareholder) pays for the survey and the $47 DEP filing fee, since the owner is the permit applicant. The co-op board does not fund or order the ACP-5 on the shareholder’s behalf, though the board may require a copy of the control number as part of its alteration approval process.
How long does an ACP-5 filing take in NYC?
From scheduling the survey to having a DEP-filed ACP-5 control number in hand typically takes 10–21 business days under standard conditions. Rush lab processing (24-hour turnaround) can compress the lab portion, but DEP review and DOB permit processing still add several business days. If an ACP-7 and abatement are required, add 2–4 weeks minimum.
Can my HVAC contractor handle the ACP-5 filing?
No. Only a DEP-certified asbestos investigator credentialed under NYS Labor Law Article 32 can conduct the survey, complete the form, and file it with DEP. An HVAC contractor can recommend certified investigators and coordinate scheduling, but the legal responsibility for the filing sits with the licensed investigator, not the HVAC crew.
