Accessory dwelling unit rental — San Mateo, CA
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.
About this service
This refers to using your ADU as a source of monthly income by leasing it to tenants. You need this service if your goal is to generate cash flow from your extra space. Before you begin, we help you understand the local regulations regarding long-term or short-term rentals in your area. We focus on building a structure that appeals to quality tenants. Exact pricing confirmed free on the call.
Frequently asked in San Mateo
What accessory dwelling unit services are available in San Mateo?
What is the accessory dwelling unit cost in San Mateo?
What is the accessory dwelling unit permit cost in San Mateo?
What kind of ADU company should I look for in San Mateo?
Are there 24-hour ADU services in San Mateo?
While complete 24-hour ADU construction services aren't typical, emergency repair services for existing accessory dwelling units are available in San Mateo. If you encounter an urgent issue like a major leak or electrical problem, contact a qualified contractor immediately. They can provide rapid assessment and repair. For new construction or planned renovations, standard business hours apply.
What are the benefits of prefabricated accessory dwelling units in San Mateo?
Prefabricated accessory dwelling units offer several benefits in San Mateo. They can significantly reduce construction time as many components are built off-site in a controlled factory environment. This often leads to more predictable costs and higher quality control. Prefabs can be an efficient way to add living space to your property while minimizing disruption. They are designed to meet local building standards.
What is the accessory dwelling unit permit process in San Mateo?
The accessory dwelling unit permit process in San Mateo involves submitting detailed architectural plans and construction documents to the city's planning and building departments. These plans must comply with all local zoning ordinances and building codes. Once reviewed and approved, permits are issued, allowing construction to begin. Experienced professionals can help navigate this process effectively in San Mateo.
Also serving nearby: Hayward · Daly City · Oakland · Sunnyvale · Fremont
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of San Mateo — population 101,327; about 8,350 residents per square mile across 12.1 sq mi. ZIP codes covered include 94401, 94402, 94403, 94404, 94497.
Neighborhoods served in San Mateo: Bay Meadows, Hillsborough, Edgewater, Shoreline, Central San Mateo — and every surrounding area.
Areas we serve
Browse by state, then city.
California (4)
All of California · Rialto · San Buenaventura (Ventura) · San Mateo · Vacaville