AI plan check in San Francisco, CA
The San Francisco Department of Building Inspection reviews against the 2022 San Francisco Building Code, a local amendment of the 2022 CBC that adds seismic, historic preservation, and green building requirements the state code does not carry. What makes San Francisco hard is that one project can trigger DBI structural review, an Article 10 or Article 11 historic determination, and a shadow analysis, each running on a different clock. AI plan check reads the set against all of it before the first submittal.
For San Francisco, CA construction teams. Last reviewed August 2026.
Why San Francisco's Building Code Matters for Your Drawing Set
San Francisco enforces the 2022 San Francisco Building Code, which takes the 2022 CBC and amends it in three directions that reshape a drawing set. Seismic safety comes first. The city's soft-story retrofit program has already worked through most of its inventory, so the pressure has shifted to new construction and to buildings on fill, where mapped liquefaction zones require a geotechnical report and foundation details that actually respond to it rather than a generic spread footing schedule. Historic preservation comes second, under Articles 10 and 11 of the Planning Code, which govern designated landmarks and buildings in conservation districts and put window profiles, storefront proportions, cornices, and material choices under review. Green building comes third, and San Francisco holds its projects above the state CALGreen baseline, so energy, water, and commissioning documentation assembled for a generic California project usually falls short here. Add the shadow analysis requirement for buildings over 40 feet near public parks and the entitlement track starts feeding the building permit track.
How the San Francisco Department of Building Inspection (DBI) Reviews Construction Drawings
Most projects clear DBI in 6 to 16 weeks, longer when Planning has to weigh in. That range hides the real variable, which is how many parallel reviews a project triggers. A ground-up building in a historic district can be sitting with a DBI structural reviewer, a Planning preservation planner, the Fire Department, and Public Works at the same time, and any one of them can return a comment that forces a change the others already approved. DBI has moved most intake onto electronic submittal and keeps over-the-counter review available for smaller scopes, but conversions and larger buildings go through the full queue. The scheduling risk here tracks the number of cycles more than the length of any single one, because each round can reopen a question another reviewer had already closed.
Common Plan-Check Issues in San Francisco
Set-level failures in San Francisco cluster around four things. Foundations on the eastern waterfront and other fill areas draw comments when the structural drawings reference a geotechnical report that either does not exist yet or recommends something the details never picked up, particularly ground improvement or deep foundations in mapped liquefaction zones. Historic work under Article 10 or Article 11 gets returned over details that read fine on a modern building and wrong on a designated one: replacement windows with the wrong sightline, storefront alterations that change the bay rhythm, or rooftop equipment visible from the street. Office-to-residential conversions generate their own pile of corrections, because the existing structure, egress, and light and air conditions were designed for a use the code now measures differently, and unit layouts often fail operable window and exit access requirements before anyone even checks the frame. Green submittals get kicked back when the documentation was built to CALGreen rather than to San Francisco's own thresholds. Shadow analysis is the quiet one: teams designing near a park find out about the 40-foot trigger late, after the massing is fixed.
San Francisco Project Types and What They Require
High-rise residential drives the most demanding coordination in the city, where structural, envelope, and fire and life-safety systems have to line up across dozens of floors and any inconsistency repeats itself vertically. Office-to-residential conversions have become their own review problem, since a floor plate designed for open office rarely delivers the light, air, egress, and unit separation a residential occupancy needs without structural intervention. Seismic retrofit work continues on non-residential and larger buildings even though the soft-story program has largely run its course, and it brings existing-condition documentation into the submittal. Historic renovation carries the Article 10 and Article 11 layer on top of everything else. Lab and biotech space in Mission Bay and the southeast adds hazardous materials classification, exhaust and containment, and mechanical loads that push the structural and MEP sheets well past a standard office fit-out. The checks that matter differ across all of that.
San Francisco Plan-Check FAQs
What building code does San Francisco use?
DBI enforces the 2022 San Francisco Building Code, which is the 2022 California Building Code with local amendments covering seismic safety, historic preservation under Articles 10 and 11, and green building requirements that go beyond state CALGreen. Design to the San Francisco edition, because the amendments are where the corrections come from.
How long does DBI plan review take?
Most projects see 6 to 16 weeks, and it runs longer when Planning review is involved. The wide range reflects how many parallel reviewers a project pulls in. Smaller scopes can go over the counter, while conversions, historic work, and larger buildings go through the full queue and often several review bodies at once.
My site is in a liquefaction zone. What does that change?
A mapped liquefaction zone means the structural design needs a geotechnical report behind it and foundation details that reflect the report's recommendations, whether that is ground improvement, deep foundations, or a stiffened mat. Reviewers compare the details against the report. A set that cites a report but details a conventional spread footing schedule is a reliable source of structural corrections.
What do Articles 10 and 11 require?
Article 10 covers designated landmarks and historic districts, and Article 11 covers significant and contributory buildings in downtown conservation districts. Both put exterior alterations under design review, so window profiles and sightlines, storefront proportions, cornice and trim details, exterior materials, and the visibility of rooftop equipment all get scrutinized against the building's historic character.
Why are office-to-residential conversions harder than they look?
A deep office floor plate was never laid out for the light, air, and egress a residential occupancy needs, so unit layouts routinely fail operable window and exit access requirements before the structure is even evaluated. Add corridor separation, acoustic assemblies, and a plumbing distribution problem the original building never anticipated, and the conversion set carries more code exposure than most ground-up projects of the same size.
How does AI plan check help on a San Francisco project?
Helonic screens the whole set against the 2022 SF Building Code in minutes, checking liquefaction and geotechnical consistency, Article 10 and Article 11 historic detailing, shadow analysis triggers, San Francisco's green thresholds, and cross-discipline coordination, with a sheet and code section on every finding. That lets the team close issues before a set enters DBI's multi-reviewer queue. Helonic is a screening tool. The licensed Engineer of Record retains design responsibility, and DBI retains approval authority.
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Ready to AI-Review Your San Francisco Project?
Upload a drawing set and see what AI plan check surfaces against 2022 San Francisco Building Code based on 2022 CBC with local amendments and the dbi enforces local amendments for seismic safety, historic preservation (article 10/11), and green building requirements beyond calgreen - before you submit to the San Francisco Department of Building Inspection (DBI).
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