Los Altos Hills Home Builder

ADU Builder Los Altos Hills

When you need flexible living space for family, guests, a home office, or rental income, De Mattei Construction is the trusted ADU builder in Los Altos Hills. With extensive experience navigating both California ADU regulations and local permitting processes, we make the journey from concept to completion seamless. Whether you’re envisioning a compact studio, a one-bedroom retreat, or a spacious two-bedroom unit, our team designs and builds ADUs that maximize every square foot while blending seamlessly with the style of your main residence.

Smart, Functional, and Durable ADU Design

Our approach to Los Altos Hills ADU construction goes beyond simply adding space—we create units that are efficient, livable, and built to last. From handling zoning reviews, feasibility studies, and permit management to designing layouts with ample storage and abundant natural light, we prioritize both comfort and practicality. Each ADU is outfitted with efficient kitchens, well-planned bathrooms, and reliable mechanical systems that keep performance high while maintenance stays low. With durable finishes, clean construction practices, and attention to detail, your new ADU will not only enhance your property’s functionality but also add long-term value.

Custom Homes & Major Additions (Los Altos Hills Construction)

When it comes to Los Altos Hills construction, De Mattei Construction specializes in creating custom homes and thoughtfully designed major additions that enhance both lifestyle and long-term value. Whether you’re starting fresh with a ground-up build or expanding your existing residence, our team manages the entire process with precision. From feasibility studies and accurate budgeting to architectural and engineering coordination, permitting, and a detail-driven build, we ensure every stage of your project is handled seamlessly under one accountable partner. The result is a home or addition that balances high performance with timeless design, tailored to the unique character of Los Altos Hills properties.

Performance, Beauty, and Lasting Value

Our approach to new home construction and additions in Los Altos Hills emphasizes both form and function. We carefully plan sites to maximize natural light, views, privacy, and access, while incorporating energy-efficient building envelopes, advanced glazing, and high-performance HVAC systems. Exterior assemblies are designed with hillside conditions and microclimates in mind, ensuring durability, weather resistance, and long-term performance. Inside, we craft custom kitchens, spa-level bathrooms, and seamless indoor–outdoor living spaces that reflect the way you live today. Every project includes modern conveniences such as smart-home readiness and solar-friendly design, creating homes that are forward-thinking, efficient, and built to stand the test of time.