What Insurance Does a 12-Unit Apartment Building Need?

A 12-unit building is a real business. It has a payroll of tenants, a roof that protects a dozen households, and a liability exposure that grows every time someone walks up the stairs. It is also past the size where a landlord or dwelling policy usually applies, so it is insured as commercial property. Here is what to review, in the order we usually go through it with owners.

1. The building itself

Start with the right limit. Use a replacement-cost estimate for the building — what it would cost to rebuild today with similar materials — not the purchase price or the tax assessment. Ask whether the policy pays replacement cost or actual cash value, and whether there is a coinsurance clause. If the limit is too low and coinsurance applies, a partial claim can be reduced.

Then look at how causes of loss are covered. A special form policy covers direct physical loss unless excluded, which is broader than the named-peril basic and broad forms. Check the wind and hail deductible separately: in storm-prone areas it may be a percentage of the building limit.

2. Premises liability

This is the coverage that answers when a tenant’s guest slips on an icy walkway or falls on a broken stair. For a 12-unit building, review:

• The per-occurrence and aggregate limits
• Exclusions that matter for apartments, such as assault and battery, habitability, or animal liability
• Whether your property manager can be added as an additional insured

3. Loss of rents

If a fire takes six units offline for nine months, the mortgage does not pause. Loss of rents (a form of business income coverage) can replace rent you would have collected while the building is repaired. Size it for a realistic rebuild, including permits and contractor availability — not just a couple of months.

4. Equipment breakdown

Boilers, water heaters, HVAC units and electrical panels fail suddenly. Those mechanical and electrical breakdowns are generally excluded from the property form and covered by equipment breakdown, which can also include the rent lost while systems are repaired.

5. Ordinance or law

Older buildings carry a hidden cost: after a covered loss, the city can require the rebuilt portion — or the whole building — to meet current code. Ordinance or law coverage can pay for the loss of the undamaged portion that must be torn down, the demolition, and the increased cost of construction. If your building predates current codes, this matters.

6. Coverage that sits outside the main policy

• Flood: excluded from standard commercial property policies. Look at the NFIP or private flood if you are anywhere near water.
• Umbrella or excess liability: extra limits above the primary liability, often inexpensive relative to the protection.
• Crime or employee dishonesty: if staff or a manager handle rent payments.
• Hired and non-owned auto: if employees run errands for the building in their own cars.

7. What the underwriter will ask

Have these ready and the process moves quickly:

1. Year built, construction type and square footage
2. Years of the latest roof, electrical, plumbing and HVAC updates
3. Rent roll and occupancy
4. Smoke detectors, fire extinguishers, sprinklers and alarms
5. Five years of loss runs

The short version

For most 12-unit buildings, the core package is building coverage at replacement cost, premises liability, loss of rents and equipment breakdown, with ordinance or law for older buildings and separate flood where needed. Which of these a carrier offers, and at what limits, varies — none of them is automatic, so read the quote line by line.

If you want us to look at your building, see apartment building insurance or send the details through the form on this page.