Floor Plan Drafting · San Francisco, CA
Professional Floor Plan Drafting
for San Francisco, CA Homes
As-built drawings, permit-ready floor plans, and renovation layouts for San Francisco homeowners, investors, and contractors. Accurate CAD drawings in 10 business days, starting at $997.
14-day money-back guarantee · 10 business day turnaround
Common Uses in San Francisco
Local Intelligence
What San Francisco Homeowners Need to Know Before Submitting
Size & Zoning Rules
Accurate floor plans are the foundation of any ADU, garage conversion, or addition permit in San Francisco — Department of Building Inspection (DBI) will not accept a permit application without them. San Francisco's current ADU size cap is 1,000 sq ft — within the typical range for most floor plan configurations.
San Francisco does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
Homeowners in San Francisco who document and legitimize their square footage correctly are positioning a home in a rental market where 1-bedroom units average approximately $3,643/month.
Permit Process & Fees
Department of Building Inspection (DBI) permit fees for this project type typically range from $3,500 to $12,000 depending on project valuation and scope. Plan check runs approximately 8 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Floor plans submitted to Department of Building Inspection (DBI) as part of a permit application must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus if structural changes are involved, a licensed engineer must stamp the structural drawings.
Visit Department of Building Inspection (DBI) ↗Construction Cost Context
San Francisco's adu / renovation construction costs run $245–$540 per square foot — a wide range driven by labor markets, local code complexity, and finish level. Our drawings are priced at a fraction of what a full-service architect would charge to produce the same permit set.
⚠ Common Pitfall in San Francisco
Many San Francisco homes sit on lots zoned within the Coastal Zone boundary near the western neighborhoods, which means your ADU may need a separate Coastal Development Permit from the Planning Department before DBI even looks at your plans — this can tack on 8-12 weeks and requires extra documentation on drainage and neighboring sightlines. DBI's own plan check backlog for ADUs often runs longer than the quoted timeline once you factor in the mandatory fire escape and light-well review for older Edwardian and Victorian buildings, since many predate current egress codes and require creative structural workarounds. If your project involves converting a garage, expect DBI to require a separate sewer lateral inspection through SFPUC, and if the lateral is original clay pipe (common in pre-1950 homes), replacement costs of $15,000-$25,000 can surface as a surprise mid-permit requirement.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that $350/sqft and 8-week timeline are San Francisco state-level estimates, not gospel — I'd get at least two local contractor quotes and call DBI directly before penciling in a budget or start date, especially since coastal overlay properties almost always need a CDP that can tack on several additional months I've seen catch homeowners off guard."
Market Context
San Francisco has a median home value of $1,176,000. Comparable renovation projects in this market typically add 27.0% to resale value.
Neighborhoods in San Francisco with the strongest renovation and resale value potential include Sunset District, Richmond District (Inner Richmond), Noe Valley, Bernal Heights, Potrero Hill. Large tracts of single-family homes and larger lots make the Sunset highly suitable for detached ADUs near family-oriented rental demand.
Permit Process
Permit applications are reviewed by the Department of Building Inspection (DBI), with a plan check timeline of approximately 8 weeks. Permit fees in San Francisco range from $3,500 to $12,000 depending on project scope. Design review: Yes - in historic districts only.
San Francisco falls within Seismic Design Category Seismic Design Category D (commonly) — site-specific SDS and site class can raise some locations to SDC E; verify with project-specific USGS/ASCE 7 design maps and local DBI, which affects structural requirements for any new addition tying into the existing structure.
Properties within San Francisco's Coastal Overlay Zone require a Coastal Development Permit in addition to standard building permits.
Local Financing Resources
Local Floor Plan Lenders in San Francisco
These lenders offer HELOC and renovation financing that often requires accurate as-built drawings in San Francisco County. Compare terms before committing.
Construction & ADU loans from $50,000 to $2M; RCU offers ADU construction loans and an ADU-specific product in partnership with local ADU centers.
Visit Lender ↗Offers an ADU HELOC with a 12-month introductory fixed rate (example shown 5.750% APR) and HELOC limits up to $400,000 for second-home/investment—ADU-specific pricing and requirements listed on their HELOC page.
Visit Lender ↗SFFCU offers home equity loans and HELOCs for remodeling and home projects with competitive rates and terms (used for ADU financing in owner-occupied properties).
Visit Lender ↗Explicit Accessory Dwelling Unit (ADU) loan — interest-only draws with max 12-month term; membership available to residents of San Francisco County and surrounding Bay Area counties.
Visit Lender ↗RenoFi offers renovation HELOCs/HELOANs and After-Renovation-Value lending up to $750K and partners with credit unions/lenders in California to offer RenoFi loans suitable for ADU projects.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Local Contractors in San Francisco
Need a contractor once your drawings are ready? These are vetted local options. Independent — no referral fees paid or received.
Build With A Plan provides drawings only. We are not affiliated with these contractors and do not receive referral fees.
What We Deliver
What's Included in Your San Francisco Floor Plan Package
Transparent Pricing
San Francisco Floor Plan Packages
One-time fee. No retainer. No hourly billing.
- ✓As-built floor plans (all levels)
- ✓Verified square footage
- ✓Door & window schedule
- ✓Room labels and dimensions
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Electrical layout documentation
- ✓Plumbing fixture locations
- ✓Site plan with setbacks
- ✓Code notations for permit submittal
- ✓1 round of revisions
- ✓Everything in Standard
- ✓Proposed renovation overlay
- ✓3D massing model
- ✓HOA submission package
- ✓Title 24 energy compliance
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
How It Works
Your Floor Plans in 3 Steps
Share Your Home Details
Provide your property address, room measurements, and photos. We'll confirm your order and assign a drafting coordinator within 4 business hours.
We Draft Your Plans
Our CAD team converts your measurements into precise, scaled floor plans — formatted for San Francisco's building department and CA code standards. Delivered in 10 business days.
Download and Use
Receive your drawings in PDF and DWG format — ready for permit submittal, contractor bidding, listing agents, appraisers, or HOA submission.
Common Questions
San Francisco Floor Plan Drafting FAQs
When do I need professionally drafted floor plans in San Francisco? +
You need accurate floor plans for: permit applications (required by San Francisco's building department for any structural work), refinancing or home equity loans, selling your home (accurate square footage documentation), renovation contractor bidding, HOA design review submissions, and insurance claims. Our as-built drawings capture your home's exact current dimensions.
What is an as-built floor plan and why do I need one in San Francisco? +
An as-built floor plan documents your home as it currently exists — including all room dimensions, door and window locations, wall thicknesses, and square footage. These are required when the original permit drawings are unavailable or the home was modified without permits. San Francisco's building department requires accurate as-builts when you apply for renovation or addition permits on older homes.
How much does floor plan drafting cost in San Francisco? +
Our floor plan drafting packages for San Francisco start at $997 for a standard residential home. This includes measured floor plans for all levels, room labels, door and window schedules, and verified square footage. Local drafting services typically charge $1,500–$4,000 for the same work. We deliver within 10 business days with a 14-day money-back guarantee.
How do you create floor plans remotely for my San Francisco home? +
You provide basic measurements (room dimensions, door/window sizes) and photos of each room. Our drafting team converts these into accurate CAD drawings with precise dimensions, wall thicknesses, and notations. For permit-grade as-built drawings, we may request additional measurements or a site visit from a local partner. We serve all San Francisco neighborhoods remotely.
What format are the floor plan drawings delivered in? +
We deliver drawings in PDF (for printing and permit submission) and DWG/DXF (AutoCAD-compatible format for contractors, engineers, and architects to work from). All drawings are formatted to San Francisco building department standards and include title block, scale, and code notations required for permit submission.
Can you draft floor plans for a rental property or multi-unit building in San Francisco? +
Yes — we draft floor plans for single-family homes, duplexes, triplexes, ADUs, condos, and small commercial properties in San Francisco. Multi-unit buildings are priced based on the total number of units and floors. Contact us for a custom quote if your property has more than 4 units.
Will accurate floor plans increase my home's value in San Francisco? +
In San Francisco, where median home values are around $1,176,000, inaccurate or missing square footage records can suppress list price and appraisal value. Professional as-built drawings establish defensible square footage for appraisers and buyers. Unpermitted additions documented and legitimized through permit drawings can recover thousands in appraised value.
Do I need floor plans to get an ADU or addition permit in San Francisco? +
Yes — San Francisco's building department requires accurate floor plans as part of any ADU, garage conversion, or addition permit application. Our packages combine floor plan drafting with the full permit-ready drawing set (site plan, elevations, electrical, Title 24) needed for plan check submittal. If you only need the floor plans themselves, our Starter package covers that.
Can you draft floor plans from old blueprints or photos in San Francisco? +
Yes — we can redraft from original blueprints, scans of old permit sets, hand-drawn sketches, or room photos combined with your measurements. We regularize old drawings to current CAD standards and update them to reflect any modifications made since original construction. This is a common service for San Francisco homes built before the 1990s.
Nearby Cities
Also Available in San Francisco
Planning to build an ADU? See our ADU design service.
Next Steps
Ready to Move Forward With Your San Francisco ADU?
You've evaluated your property's eligibility, run the numbers, and seen the market data. The next step is getting permit-ready architectural drawings to submit to Department of Building Inspection (DBI).
Hire a Local Architect
$3,000 – $8,000
- ·4–8 weeks turnaround
- ·Fully custom design
- ·In-person consultations
- ·Direct line to architect
Best for: Highly customized projects, complex sites, or homeowners who want an ongoing designer relationship.
Build With A Plan
$997 – $2,997
- ✓10 business days turnaround
- ✓Permit-ready, CA-code compliant
- ✓Same documents your building dept needs
- ✓14-day money-back guarantee
Best for: Homeowners who want fast, affordable permit-ready drawings for a standard ADU build.
Both options produce permit-ready architectural drawings accepted by Department of Building Inspection (DBI). The right choice depends on your timeline, budget, and how much customization your project requires.