Which NYC Local Laws Apply to My Small Building?
September 8, 2026Last reviewed October 8, 2026
Most of NYC's best-known building laws, like LL97 and facade inspections, don't apply to small buildings. Here's which ones a 3–20 unit condo or co-op can set aside, and the ones it can't afford to miss.
If you've read anything about NYC building compliance, you've probably come across Local Law 97 and wondered whether your 8-unit co-op is about to owe carbon fines. For most small buildings, the answer is no.
A lot of NYC's best-known building laws are triggered by square footage or height. Most small condos and co-ops sit well below those thresholds. Several others apply to almost every building, regardless of size, and those are the ones small boards tend to miss.
This guide sorts them into two groups: what you can probably set aside, and what you can't.
The quick answer
| Law | What triggers it | Typical small building (3–20 units) |
|---|---|---|
| Local Law 97 (carbon limits) | Over 25,000 gross sq ft | Usually doesn't apply |
| LL84 / LL133 (energy benchmarking) | Over 25,000 gross sq ft | Usually doesn't apply |
| LL87 (energy audits) | Over 50,000 gross sq ft | Doesn't apply |
| FISP / Local Law 11 (facades) | More than 6 stories | Usually doesn't apply |
| LL126 (parapets) | A parapet facing a street or sidewalk | Often applies |
| LL152 (gas piping) | Gas service; not a 1–2 family home | Applies if you have gas |
| HPD annual registration | 3 or more residential units | Applies |
| Annual boiler inspection | Low-pressure boiler in a building with 6+ families | Applies at 6+ units; exempt at 5 or fewer |
| Heat and hot water | Any residential building | Applies |
| Window guard / lead paint notices | 3+ units (lead: built before 1960, or 1960–78 with known lead paint) | Applies |
| LL69 (bed bug filing) | 3+ units; condos and co-ops when units are rented | Often applies |
| LL157 (natural gas detectors) | Residential units with gas appliances | Will apply; enforcement postponed to no earlier than 2027 |
Laws most small buildings can skip (but confirm once)
Local Law 97: carbon emissions limits
LL97 sets carbon caps for buildings over 25,000 gross square feet. A typical Brooklyn brownstone co-op or a 10-unit walk-up is a fraction of that. If you've received marketing letters about LL97 compliance, check your square footage before spending money on consultants.
Edge case: LL97 also covers two or more buildings on the same tax lot that together exceed 50,000 square feet, and certain buildings held together as a condo.
Local Laws 84 and 87: benchmarking and energy audits
Benchmarking (LL84, expanded by LL133) applies over 25,000 square feet. Energy audits and retro-commissioning (LL87) apply over 50,000 square feet. The same advice applies: check once and write down the answer.
FISP / Local Law 11: facade inspections
The Facade Inspection Safety Program covers buildings taller than six stories. A 4- or 5-story walk-up is out. If your building is 7 stories or more, this is one of your biggest compliance items, and you need a qualified engineer or architect on a 5-year cycle.
Laws that apply to almost every small building
HPD annual registration
If your building has three or more residential units, it must register with HPD every year by September 1, and that includes condos and co-ops. The board registers for the whole building. Skipping it means penalties, and HPD won't let you certify violation corrections. Full guide →
Local Law 152: gas piping inspections
Any building with gas service, other than a one- or two-family home, needs a Licensed Master Plumber to inspect its exposed gas piping every four years. The year depends on your community district. Full guide →
Local Law 126: parapets
This one surprises small buildings. If your building has a parapet visible from a street, sidewalk or other public way, it needs an annual observation by a qualified person, with a report on file by December 31, regardless of height. Detached one- and two-family homes are exempt, as are buildings where barriers keep the public away from the exterior wall.
Boiler inspections (if 6+ units)
Low-pressure boilers in residential buildings with 5 families or fewer are exempt from the annual DOB inspection. At 6 or more, you need one every calendar year, filed in DOB NOW. Mixed-use buildings can be covered even with fewer apartments. Full guide →
Heat, hot water and annual notices
Heat season rules, year-round hot water, and the January window guard and lead paint notices apply regardless of size. Heat rules → · Annual notices →
Local Law 157: gas detectors (coming 2027)
Natural gas detectors will be required in homes with gas appliances. The City Council postponed enforcement from May 1, 2025 until no earlier than January 1, 2027. The new date is set one year after DOB determines that enough approved detectors are on the market. Plan for it, but don't panic-buy.
Edge cases worth checking
- Mixed-use buildings. A ground-floor store can pull you into requirements, like boiler inspections, that a purely residential building of the same size would skip.
- Several buildings on one tax lot. Square footage may be combined for some laws.
- Buildings with elevators. These have periodic inspection and testing requirements that walk-ups don't.
- Rented units in a condo or co-op. Having even an single renter in the building can trigger board/building obligations (bed bug history, some notices) that an all-owner-occupied building might otherwise avoid.
How to find your building's numbers
You need four facts: gross square footage, number of floors, number of residential units, and community district. All four are in NYC's public property records (PLUTO). You can find them on the city's ZoLa map or the DOF property page, or enter your address in the Stoop Report and we'll pull them for you.
Frequently asked questions
I got a letter saying my building must comply with LL97. Is that real?
Check your square footage first. Buildings under 25,000 square feet are generally not covered. Many letters are sales pitches from consultants. Official notices come from DOB.
Our building is exactly 6 units. Do we need a boiler inspection?
Yes, if you have a low-pressure boiler serving the building. The exemption is for 5 families or fewer.
Do condo unit owners file any of these themselves?
Generally no. Building-wide obligations are handled by the condo board or co-op corporation. Unit owners may have obligations inside their own apartments, like detectors and responding to annual notices.
Does LL152 apply if our building has no gas?
No. Buildings without gas piping don't need the inspection, but DOB may expect you to certify that there is no gas.