Home Addition Drawings · Daly City, CA
Permit-Ready Home Addition
Drawings for Daly City, CA
Expand your home with a permitted room addition, second story, or family room extension. We deliver complete, code-compliant drawing sets for Daly City's building department — in 10 business days, starting at $1,497.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Daly City Homeowners Need to Know Before Submitting
Size & Zoning Rules
Any new square footage added to your Daly City home counts against the same zoning envelope that governs ADU size, meaning large additions may affect your ability to add a future ADU. Daly City's current ADU size cap is 1,200 sq ft — generous enough to accommodate most project types.
Daly City does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
If the addition creates a second unit or is later converted to a rental, Daly City's ADU market supports approximately $3,135/month for a 2-bedroom unit.
Permit Process & Fees
Building Division permit fees for this project type typically range from $19,613 to $34,351 depending on project valuation and scope. Plan check runs approximately 10 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Addition permit packages submitted to Building Division must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus stamped structural drawings are always required for any load-bearing elements, second-story work, or new foundation.
Visit Building Division ↗Construction Cost Context
Daly City's home addition construction costs run $245–$525 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 Daly City
Many Daly City lots sit on old fill soil from the mid-1900s bay-area development boom, so the Building Division often requires a deeper geotechnical and liquefaction study before they'll even look at your foundation plans — this is separate from the standard structural review and can add weeks on its own. Because the whole city falls under the Coastal Zone overlay, most ADU projects also need a Coastal Development Permit on top of the regular building permit, which usually tacks on another 6-8 weeks for review and can trigger extra scrutiny if your property has any view corridor toward the ocean. On top of that, older homes in the Bayshore or Vista Grande areas often have undersized sewer laterals, and Daly City's Public Works will require a lateral inspection and possible upsizing before they sign off on final utility connection — a cost many homeowners don't budget for until it shows up mid-project.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience with Daly City projects, that 10-week plan check window and $350/sqft figure are state-level estimates, not local gospel—I'd get a couple of current contractor bids and call the Building Division directly before penciling in a budget or start date. What the data also doesn't show is that with the coastal overlay in play here, the CDP review can tack on several months beyond that permit timeline, so plan your financing and lease-up expectations accordingly. —Charlotte Pemberton, Senior ADU Design Consultant"
Market Context
Daly City has a median home value of $960,000. Comparable renovation projects in this market typically add 30% to resale value.
Neighborhoods in Daly City with the strongest home addition and resale value potential include Westlake, Coastal, St. Francis Heights, Southern Hills, Bayshore. Known for relatively larger lot sizes compared to other Daly City neighborhoods, offering more space for detached ADUs.
Permit Process
Permit applications are reviewed by the Building Division, with a plan check timeline of approximately 10 weeks. Permit fees in Daly City range from $19,613 to $34,351 depending on project scope. Design review: Yes - citywide.
Daly City falls within Seismic Design Category Seismic Design Category D (typical for Daly City / San Francisco Bay Area) — final SDC must be determined for the project using ASCE 7/IBC (site-specific Ss/S1 and site class)., which affects structural requirements for any new addition tying into the existing structure.
Properties within Daly City's Coastal Overlay Zone require a Coastal Development Permit in addition to standard building permits.
Local Financing Resources
Local Home Addition Lenders in Daly City
These lenders offer HELOC, construction, and renovation loans for home addition projects in San Mateo County. Compare terms before committing.
ADU-specific HELOC program; typical credit line $10,000–$500,000, variable-rate, 22-year term disclosure available.
Visit Lender ↗Home equity loans and lines for renovations and ADUs; advertised sample HELOC rate shown around 6.75% APR (rates vary).
Visit Lender ↗Offers home equity loans and HELOCs usable for home renovations/ADUs; local SF credit union serving Daly City residents.
Visit Lender ↗Fintech that arranges ADU construction/renovation financing through partner credit unions and lenders operating in California.
Visit Lender ↗Provides construction loan products that can be applied to ADU construction projects (offers local CA construction lending).
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Home Addition Contractors in Daly City
We draw the plans. These contractors build the addition. 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.
Drawing Package Details
What's Included in Your Daly City Home Addition Package
Transparent Pricing
Daly City Home Addition Drawing Packages
One-time fee. No retainer. No hourly billing.
- ✓Site plan
- ✓Floor plans (existing + proposed)
- ✓All 4 elevations
- ✓Electrical plan
- ✓Title 24 energy compliance
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Stamped structural drawings
- ✓Foundation plan
- ✓Roof framing plan
- ✓Window & door schedules
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓Cross-section details
- ✓Material specifications
- ✓HOA submission package
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
After You Order
Your Addition Drawings in 3 Steps
Submit Your Project Details
Share your property address, existing floor plan (if available), and the addition scope. We assign your project coordinator within 4 business hours.
We Draft Your Drawings
Our team designs your complete addition drawing set — engineered for Daly City's building department requirements and CA CBC code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Building Division. We support plan check corrections at no extra charge.
Common Questions
Daly City Home Addition FAQs
Do I need a permit for a home addition in Daly City? +
Yes — any structural addition to your home in Daly City requires a building permit. This applies to room additions, second-story additions, sunrooms, and attached garages. You'll need permit-ready drawings before the building department will accept your application. Our packages are formatted specifically for Daly City's submittal requirements.
How much does a home addition cost in Daly City? +
Home additions in Daly City typically cost between $300.0–$380 per square foot depending on the scope, finishes, and structural complexity. A 600 sq ft addition ranges from $180,000 to $228,000. Second-story additions cost more than ground-floor extensions due to structural requirements. Our drawing packages start at $1,497 — a fraction of local architectural fees.
What drawings are required to permit a home addition in Daly City? +
Daly City's building department requires: a site plan showing the addition's footprint and setbacks, floor plans for all affected levels, all four exterior elevations, an electrical plan, and energy compliance (Title 24 in California). Structural plans stamped by a licensed engineer are required for any load-bearing elements — included in our Premium package.
How long does the permit process take for a home addition in Daly City? +
Plan check in Daly City typically takes 10 weeks for home additions. Additions with structural components may require additional review. Complete, code-compliant drawings significantly reduce correction cycles — each cycle adds 3–6 weeks. Our drawings are engineered to pass on the first submittal.
What setbacks apply to home additions in Daly City? +
Daly City enforces minimum setbacks from property lines for all additions: typically 4–5 ft side setbacks and 5 ft rear setbacks, though these vary by zoning district and lot size. Your addition must stay within the buildable envelope. Our site plan documents existing and proposed setbacks and flags any zoning variances required.
Do I need structural drawings for a home addition in Daly City? +
Yes, for most additions. Any load-bearing walls, new foundations, second-story construction, or roof structure changes require stamped structural drawings from a licensed engineer. California's CBC (California Building Code) and seismic requirements make structural plans mandatory for most addition types. Our Standard and Premium packages include stamped structural drawings.
How much do home addition drawings cost in Daly City? +
Our permit-ready home addition drawing packages for Daly City start at $1,497. Local architects and designers typically charge $3,000–$10,000+ for comparable drawing sets. Every package is engineered for CA code compliance and formatted for Daly City's building department. Turnaround is 10 business days with a 14-day money-back guarantee.
Will a home addition increase my home's value in Daly City? +
In Daly City, where median home values are approximately $960,000, a permitted home addition adds square footage that appraisers value as part of the home's gross living area. Return on investment varies by addition type — master suite additions, family room expansions, and additional bedrooms typically recoup 50–75% of project cost in appraised value in CA markets.
Can I add a second story to my home in Daly City? +
Second-story additions are permitted in most Daly City residential zones, subject to height limits and design review requirements. California generally requires ministerial permit approval, but some cities impose design compatibility or neighborhood compatibility review for second stories. Our drawings cover all levels including foundation upgrades, shear walls, and roof framing required for vertical additions.
Nearby Cities
Also Available in Daly City
Adding an ADU instead? See our ADU design service.
Next Steps
Ready to Move Forward With Your Daly City 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 Building Division.
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 Building Division. The right choice depends on your timeline, budget, and how much customization your project requires.