ADU Construction Services by Sigura Construction, Inc.
An Accessory Dwelling Unit (ADU) is a secondary housing unit built on a residential property that includes its own independent living essentials — a kitchen, bathroom, and sleeping area. Commonly referred to as granny flats or in-law suites, ADUs have become an increasingly popular option for homeowners looking to house family members, accommodate guests, or generate rental income.
In California — particularly across Silicon Valley, San Mateo County, and Santa Clara County — the demand for ADUs continues to grow as housing prices rise and affordability becomes a pressing concern. For many families, building an ADU on an existing property is a practical alternative to purchasing a separate home in one of the country's most competitive real estate markets.
It's worth noting the distinction between an ADU and a standard home addition. A home addition expands the existing structure by integrating new space into the main living area. An ADU, even when attached, is closed off from the primary residence and functions as a fully independent unit with its own kitchen, bathroom, and living space.
Experience and Credentials
Sigura Construction, Inc. is a licensed general contractor (License #865155) with over 24 years of experience in residential and commercial construction. They hold an A+ BBB rating and have maintained Diamond Certified status for over 18 years — a distinction that reflects consistent performance and customer satisfaction over an extended period.
As an established ADU builder and garage conversion contractor serving San Mateo and Santa Clara counties, Sigura Construction manages the entire project lifecycle. This includes design, permitting, state compliance, city inspections, and final walkthrough. Homeowners are not expected to navigate the process alone — the team handles the details from start to finish.
Their service area includes communities such as Menlo Park, Palo Alto, Hillsborough, Los Gatos, Atherton, Los Altos, and Saratoga. Each of these areas comes with its own set of zoning regulations and building codes, and Sigura Construction has developed a working knowledge of local requirements across these jurisdictions.
What Sigura Construction Brings to ADU Projects
Building in the Bay Area involves navigating a range of regulatory challenges. From Atherton's large-lot zoning requirements to Hillsborough's historic preservation codes, the permitting process can be time-consuming and complex. Sigura Construction's familiarity with local regulations helps streamline approvals and reduce delays.
Their approach to project management includes:
- Transparent, fixed-price contracts with real-time cost tracking to help avoid budget overruns
- Permit and approval handling across multiple Bay Area jurisdictions
- On-schedule delivery, with a focus on keeping projects on track
- Custom design options, including tailored layouts, material selection, and smart-home technology integration
Over two decades of residential and commercial construction experience has allowed Sigura Construction to develop a structured, repeatable process for ADU projects — reducing uncertainty for homeowners while maintaining attention to detail throughout each build.
For homeowners in the Bay Area considering an accessory dwelling unit, garage conversion, or similar project, Sigura Construction offers free estimates and a track record of completed work across San Mateo and Santa Clara counties.
