SB 721 Balcony and Deck Inspections: A Guide for Multifamily Owners
SB 721 is the California law, codified as Health and Safety Code section 17973, that requires owners of buildings with three or more multifamily units to have wood-supported balconies, decks, stairways and walkways more than six feet above ground inspected by a qualified professional. The first inspection was due by January 1, 2026, after a one-year extension, and the inspection repeats every six years. Owners must keep the reports and hand them to a buyer when the building sells.
For anyone buying or selling an apartment building, that makes the SB 721 report a closing document, not just a maintenance record. This guide explains who is covered, what the inspection involves, the repair and penalty timelines, how the condominium version (SB 326) differs, and how to handle the report in an acquisition. Statutes were read in October 2026; for the broader buying process see our guide to buying an apartment building.
Which buildings and elements are covered
Section 17973 applies to buildings with three or more multifamily dwelling units. It reaches what the statute calls “exterior elevated elements,” defined by four tests. The element must:
- be a balcony, deck, porch, stairway, walkway or entry structure, including its supports and railings, that extends beyond the exterior walls;
- have a walking surface more than six feet above ground level;
- be designed for human occupancy or use; and
- rely wholly or substantially on wood or wood-based products for structural support or stability.
The inspection also looks at “associated waterproofing elements,” meaning the flashings, membranes, coatings and sealants that keep water off the load-bearing parts. Water intrusion into hidden framing is the failure the law was written to catch.
Two groups fall outside the section. Common interest developments, such as condominium projects, are excluded and covered instead by Civil Code section 5551. A duplex is below the three-unit threshold. Elements built mainly of steel or concrete don’t meet the wood test, though an inspector should confirm how a mixed assembly is classed.
Deadlines: the 2026 extension and the six-year cycle
SB 721 originally set January 1, 2025 for the first inspection. Assembly Bill 2579, chaptered on September 28, 2024 as Chapter 835 of the Statutes of 2024, moved it to January 1, 2026. The current text of section 17973(d) requires the inspection by January 1, 2026 and every six years after that, on January 1.
| Situation | When the inspection is due |
|---|---|
| Most existing buildings | By January 1, 2026, then every six years |
| Building permit application submitted on or after January 1, 2019 | No later than six years after the certificate of occupancy |
| Qualified inspection within three years before January 1, 2019 that found the elements safe | No new inspection required until January 1, 2026 |
| Asbestos-containing material confirmed and preventing inspection | Up to nine months to abate, then up to three months to finish the inspection |
| Condominium conversion sold to the public after January 1, 2019 | Before the first close of escrow on a unit |
As of October 2026, the first-round deadline has passed. A building that changes hands now should already have a report dated before January 1, 2026, unless one of the exceptions above applies. If it doesn’t, treat that as an open compliance item.
Who can inspect, and what the report must contain
The owner hires the inspector. Under section 17973(a), these professionals qualify:
- a licensed architect;
- a licensed civil or structural engineer;
- a contractor holding an A, B or C-5 license with at least five years of experience building multistory wood-frame buildings; or
- a building inspector or building official certified by a recognized state, national or international association, as the local jurisdiction determines.
An employee of the local jurisdiction can’t do the inspection while employed there.
The inspector identifies each type of element whose failure would threaten health or safety, then examines at least 15% of each type by direct visual examination or comparable means. The written report, signed or stamped, goes to the owner within 45 days of the inspection. It must include photographs, any test results and a narrative that sets a baseline for the next cycle, and it must say whether any element poses an immediate threat or needs emergency repairs, shoring or blocked access.
A 15% sample means most elements weren’t opened up. When you read a report, note which locations were inspected and what the inspector recommended for the rest.
Repairs, timelines and penalties
The statute separates emergencies from ordinary repairs.
Immediate threats
If the report finds an immediate threat, or calls for blocked access or emergency repairs, the inspector sends it to both the owner and the local enforcement agency within 15 days. The owner must act at once. Blocking occupant access until the repair is done satisfies that duty, and the emergency work is inspected by the inspector and reported to the local agency.
Non-emergency repairs
- Apply for a building permit within 120 days of receiving the report.
- Finish the repairs within 120 days after the permit is approved, unless the local agency grants more time.
- Use a qualified, licensed contractor and follow the licensed professional’s recommendations, manufacturer specifications and the California Building Standards Code.
If repairs aren’t done within 180 days, the inspector must notify the local enforcement agency and the owner. If they’re still incomplete 30 days after that notice, the owner faces a civil penalty of $100 to $500 a day under the local fee schedule until the work is finished. The agency can also record a building safety lien, which has the force of a judgment lien and can be foreclosed. That lien is a title issue for a buyer, so ask your title officer to check for one; our title insurance guide explains the preliminary report.
The owner also has a continuing duty to keep the elements safe and functional between inspections, and local agencies may recover their enforcement costs.
Local programs: Oakland and San Jose
Section 17973(o) lets cities and counties adopt stricter rules, and some run their own submission programs. Two examples in Diamond’s investor markets, as each city described its program in October 2026:
- Oakland asks covered buildings to submit an inspection form and the written report, prepared by a qualified inspector, through its Online Permit Center. Exempt buildings file an exemption declaration, and noncompliant buildings may receive a notice of violation.
- San Jose asks owners to email the city a findings synopsis and the stamped report when the report calls for immediate repairs or identifies an immediate threat. It tells owners to keep the report at the property for two inspection cycles or 12 years.
Check the city where the building sits before you assume the state rules are the whole story. Our pages on Oakland rental property rules and the San Jose rent ordinance cover the other local requirements investors meet there.
SB 721 vs. SB 326 for condominiums
Condo buildings follow Civil Code section 5551, added by SB 326. The two laws look alike but put the duty on different people.
| Feature | SB 721 (H&S Code 17973) | SB 326 (Civil Code 5551) |
|---|---|---|
| Applies to | Buildings with 3+ multifamily units, excluding common interest developments | Condominium buildings with 3+ attached units |
| Responsible party | Building owner | Homeowners association board |
| Who inspects | Architect, civil or structural engineer, qualified contractor or certified building inspector | Licensed structural or civil engineer, or architect |
| Sample | At least 15% of each element type | Random, statistically significant sample (95% confidence, margin of error within 5%) |
| First deadline | January 1, 2026 | January 1, 2025 |
| Repeats | Every 6 years | At least every 9 years, with the reserve study |
| Records | Kept two cycles; delivered to a buyer at sale | Kept two cycles as association records |
For a condo buyer, the report arrives through the association’s resale documents; our Marin County condo guide walks through that package. If you’re buying a building with an unusual ownership form, such as a tenancy in common or a planned conversion, ask your attorney which section applies.
Using the report when you buy an apartment building
Section 17973(d) requires the owner to disclose and deliver the inspection reports to the buyer at any later sale. Ask for them in your first document request, along with the rent roll and leases, and work through these points:
- Confirm coverage. Count units and walk the exterior. Note every wood-supported element more than six feet above grade.
- Check the date and the inspector. The report should predate January 1, 2026 (or fit an exception) and be signed or stamped by a qualifying professional.
- Read the recommendations. Separate emergency items, repairs with deadlines and items to monitor.
- Match repairs to permits. Ask for the building permits and final inspections for any work the report required.
- Check for city notices or liens. Ask the seller, and search city records where a local program applies.
- Get your own opinion. Have a qualified inspector review the report and the elements during your inspection contingency.
- Price what’s open. Get contractor bids for outstanding work and negotiate a price reduction, credit or completion before closing.
A missing report isn’t a reason to walk away by itself, but it shifts work and risk to you. Budget the inspection and any repairs into your numbers; our rental property analysis guide shows where capital items belong. Lenders may ask about the report too, as our page on apartment building loans notes, and older wood-frame buildings may also face seismic retrofit requirements.
Diamond may refer you to partners we work with, such as inspectors and contractors; you’re free to choose any provider.
If you’re selling
Sellers should pull the report, the repair permits and any city correspondence before listing. A complete file answers a buyer’s first questions and keeps the issue from surfacing late in escrow. If repairs are open, decide whether to finish them or price them, and disclose either way; our guide to selling a multifamily building lists the other records buyers will request.
This is general information, not legal or engineering advice. Have a qualified inspector assess the building, and ask a California real estate attorney how section 17973 and any local ordinance apply before you buy or sell.
Questions people ask
What is an SB 721 balcony inspection?
It is the inspection Health and Safety Code section 17973 requires for wood-supported balconies, decks, stairways, walkways and similar elements more than six feet above ground on buildings with three or more multifamily units.
What was the SB 721 inspection deadline?
January 1, 2026. SB 721 first set January 1, 2025, and AB 2579 (Chapter 835, Statutes of 2024) extended it by a year. Later inspections are due every six years.
Does SB 721 apply to condominiums?
No. Common interest developments are excluded. Condo associations follow Civil Code section 5551 (SB 326), which required a first inspection by January 1, 2025 and repeats at least every nine years.
Does SB 721 apply to a duplex or a single-family rental?
No. The section covers buildings with three or more multifamily dwelling units.
Who can do an SB 721 inspection?
A licensed architect, a licensed civil or structural engineer, a contractor with an A, B or C-5 license and five years of multistory wood-frame experience, or a certified building inspector or official, as the local jurisdiction determines.
Does the seller have to give me the SB 721 report?
Yes. The owner must keep reports for two inspection cycles and disclose and deliver them to the buyer at a sale.
What happens if repairs aren’t made?
If repairs aren’t done within 180 days, the inspector notifies the local agency and the owner. Thirty days after that notice, a civil penalty of $100 to $500 a day can apply, and the agency can record a lien.
If you’re evaluating an apartment building and want help organizing the SB 721 report, permits and other diligence into a clear offer, talk with us about investment property or browse our multifamily investing guides.
Sources & notes
- California Public Law: Health and Safety Code section 17973 (balcony and deck inspections)
- California Public Law: Civil Code section 5551 (condominium balcony inspections)
- CalMatters Digital Democracy: AB 2579 (2024), balcony and deck inspection deadline extension
- City of Oakland: Inspections of balconies, decks and other exterior elements
- City of San Jose: Exterior balcony, deck and stairway inspections (E3 program)
We read sections 17973 and 5551 on California Public Law in October 2026; check the official version on leginfo.legislature.ca.gov before relying on a subsection. We don’t quote inspection or repair costs, which depend on the building and the contractor.
Last reviewed October 2026 by Matthew Martinez.
