ADU Construction projects in Burlingame reflect the realities of the Peninsula / San Mateo County construction market: skilled-labour rates, permit fees, and material costs that sit above the national average. ADU costs in the Bay Area are among the highest in the country, driven by land costs, permit fees, and labor. That said, the rental income potential consistently exceeds the carrying cost of a construction loan — making most Bay Area ADU projects financially sound.
Cost Ranges for ADU Construction in Burlingame
The following ranges reflect current pricing for Burlingame and the wider Peninsula / San Mateo County area:
- JADU (Junior ADU, within existing space): $32,000–$80,000
- Garage conversion (full ADU): $96,000–$176,000
- Attached ADU addition: $128,000–$240,000
- Detached ADU (500–800 sq ft): $144,000–$256,000
- Detached ADU (800–1,200 sq ft): $208,000–$360,000
- ADU design and permits (no construction): $12,000–$32,000
Labour and Market Costs in Burlingame
Licensed tradespeople in the Bay Area — plumbers, electricians, tile setters, carpenters — work in one of the highest labour markets in the country, typically billing $100–$140 per hour.
Key Factors That Affect Your Price
- Unit size — every additional square foot adds cost
- Foundation type — slab vs. crawl space vs. basement
- Utility connections — new meter, sewer lateral, and gas connections
- Finishes — kitchen appliances, flooring, tile quality
- Site conditions — slope, access, tree removal
- Plan check fees — San Francisco charges among the highest in the state
Permit Requirements
Many adu construction scopes in Burlingame require permits through the Burlingame Building Department. Permit fees typically add $500–$3,000 to a project’s total. A licensed contractor should pull all required permits — if a contractor suggests skipping permits on significant work, that is a red flag.
Getting an Accurate Estimate
IronNest Construction does not take on this trade and does not bid it — we are a Class B general builder and we only quote work we carry insurance for. Use the ranges above to judge the quotes you do get: insist on a written, fixed-scope estimate after an in-person assessment, and treat a price given over the phone as a guess rather than a bid.
What Burlingame Conditions Mean for ADU Construction
Burlingame sits in the Peninsula / San Mateo County, which means persistent fog, salt air and wind-driven rain, so surfaces rarely get a long dry spell. Salt carried in on the fog is the part people underestimate: it attacks fasteners and finishes on the seaward side long before the sheltered side shows anything.
The Peninsula's maritime climate means fog, moisture, and mild temperatures year-round. Exterior materials need to resist sustained moisture exposure.
ADU Construction Permits and Inspections in Burlingame
Burlingame's Community Development / Building Division applies detailed design review, especially for additions and exterior changes. We plan scope and documentation accordingly.
Every ADU and addition needs a building permit, structural engineering and Title 24 energy compliance. State law requires the city to decide a complete ADU application within 60 days and waives impact fees on units under 750 square feet. We prepare the submittal, answer plan-check comments, coordinate utility connections and meet the inspector at each stage.
Where We Work in Burlingame
We take adu construction work across Burlingame, including Burlingame Park, Easton Addition, Lyon-Hoag, Hillside. Travel inside the city is included in the quoted price.
Burlingame at a Glance
Burlingame is one of the Peninsula's most established and desirable residential communities, with a mix of historic homes, mid-century Ranches, and newer construction near the Bayfront. Construction standards here are high, and homeowners expect contractors who can match that level. We deliver high-end kitchen remodels, bathroom renovations, and exterior work throughout Burlingame, handling San Mateo County permits from start to finish.
- Area: Peninsula / San Mateo County (ZIP 94010)
- Served from: our San Francisco branch, (415) 770-4977
- Typical Burlingame work: San Mateo County permits handled; Historic and period home renovation experience; High-end kitchen and bath renovations
- Nearby cities we also serve: San Mateo, South San Francisco, Redwood City
