ADU & Home Additions in Daly City
Maximize your Daly City property with an ADU or addition — rental income, multigenerational living, or dedicated workspace.
How Much Does ADU & Home Additions Cost in Daly City?
Garage conversions start lower. Detached ADUs and second-story additions at the higher end. Includes all permits and finishes.
Every project is unique. We provide a fixed-price contract after your free consultation — no hidden fees, no cost-plus surprises. The price you agree to is the price you pay.
What to Know About ADU & Home Additions in Daly City
Local building codes, neighborhood character, and permit requirements vary by city. Here's what Daly City homeowners should know before starting a project.
- 01Daly City has been actively processing ADU applications and maintains a clear set of guidelines — the Building Division is familiar with state ADU law and processes applications within the 60-day mandate
- 02Hillside properties in Daly City along Skyline Boulevard and the Crocker Amazon area may require geotechnical reports for new construction due to slope stability concerns
- 03Daly City's proximity to Daly City BART and Colma BART stations makes ADUs within a half-mile radius exempt from parking requirements — a significant advantage for garage conversions
- 04Westlake row homes on smaller lots have more limited ADU options; Junior ADUs (up to 500 sq ft within existing space) or compact detached units are typically the best approach
- 05Daly City's rental market is strong due to San Francisco spillover demand — a one-bedroom ADU can command $2,000-$3,000/month, providing attractive returns on construction investment
Our ADU & Home Additions Process
A clear, structured approach from your first call to final reveal.
Feasibility Assessment
We evaluate your property, zoning, and lot coverage to determine what's possible and what will deliver the best ROI.
Design & Engineering
Our architects create plans that maximize space, light, and livability while meeting all local building codes.
Permits & Approvals
We navigate the full permitting process — city planning, building department, and utility coordination.
Construction
Our experienced crew builds your ADU with the same quality standards as our luxury home remodels.
Inspection & Handover
We manage all inspections, obtain the certificate of occupancy, and walk you through your completed ADU.
ADU & Home Additions in Daly City: FAQ
Answers to common questions from Daly City homeowners.
Under California state law, you can build a detached ADU up to 1,200 sq ft on most Daly City single-family lots, plus a Junior ADU up to 500 sq ft within your existing home. On smaller Westlake lots, a detached ADU up to 800 sq ft is typically permitted by right, regardless of lot coverage ratios. We assess your specific lot during our free consultation.
Daly City processes ADU applications within the state-mandated 60-day timeline when applications are complete. Total project timeline from design to move-in is typically 8-12 months. Garage conversions are faster — often 6-8 months total. Having complete engineered plans at submission is the key to avoiding delays.
Yes. Garage conversions are the most popular ADU type in Daly City. California law allows the conversion without replacing parking spaces, even in areas with street parking pressure. We transform two-car garages into comfortable studio or one-bedroom units with full kitchens, bathrooms, private entrances, and quality finishes. Foundation upgrades are typically needed since garage slabs are thinner than residential standards.
Daly City ADUs are among the best investments on the Peninsula. Construction costs of $140K-$350K for a unit that generates $2,000-$3,000/month in rental income and adds $200K-$350K in property value. The proximity to San Francisco and BART ensures strong tenant demand. Most Daly City ADU investments pay for themselves within 7-10 years through rental income alone.
Yes, but hillside properties require additional engineering. A geotechnical report evaluates soil stability and slope conditions, and foundation design is more complex (often requiring piers or retaining walls). The views from hillside ADUs can be spectacular, and the premium rent they command helps offset the additional engineering costs.
In most cases, no. California law eliminates parking requirements for ADUs within a half-mile of public transit, and most Daly City neighborhoods are within this radius of BART stations or SamTrans routes. Even outside these zones, a single uncovered parking space (which can be tandem on your driveway) is the maximum requirement.
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Explore our other design-build services available in Daly City.
Ready to Start Your Daly City ADU & Home Additions?
Book a free in-home consultation. We'll discuss your vision, walk through your space, and provide a detailed fixed-price estimate — no pressure, no obligation.