Accessory Dwelling Units (ADUs) are one of the most effective ways to maximize your property’s potential. Whether you’re looking to create a rental unit, a guest house, or a private space for family members, ADU construction offers flexibility, value, and long-term benefits.
At Mount Construction, we specialize in designing and building high-quality ADUs tailored to your needs, lifestyle, and local regulations in Sunnyvale, CA. From concept to completion, we ensure a seamless and stress-free construction experience.
An ADU (Accessory Dwelling Unit) is a secondary residential unit built on the same lot as a primary home. It can be attached, detached, or converted from an existing space like a garage or basement.
ADUs are ideal for:
We start by understanding your goals, budget, and property layout. Our team evaluates zoning laws and feasibility to ensure your ADU project meets local requirements.
Our experts create a custom design that blends functionality with aesthetics. We handle all necessary permits and approvals, making the process smooth and hassle-free.
Using high-quality materials and skilled craftsmanship, we bring your ADU to life. Our team maintains strict timelines and keeps you updated throughout the build.
Once construction is complete, we conduct detailed inspections to ensure everything meets safety and quality standards before handing over your new space.
A standalone unit built separately from the main house, offering maximum privacy and independence.
Connected to the main home, ideal for maintaining proximity while still having a separate living space.
Transform your existing garage into a fully functional living unit—cost-effective and efficient.
Utilize unused basement space and convert it into a comfortable and modern living area.
Planning an Accessory Dwelling Unit (ADU) is one of the most important phases of the entire project. A well-thought-out plan not only ensures a smooth construction process but also helps you maximize functionality, return on investment, and long-term comfort. Whether you’re building for rental income, family use, or additional workspace, taking the time to plan properly will save you time, money, and stress later on.
Before anything else, it’s essential to understand the local zoning laws and building regulations in Sunnyvale, CA. ADU rules can vary depending on your property type, lot size, and neighborhood. These regulations typically cover:
Working with professionals ensures your project complies with all local codes, avoiding delays or costly redesigns.
Clearly identifying the purpose of your ADU will guide every design and construction decision. Ask yourself:
Your goals will influence the layout, size, features, and overall budget of the project.
Selecting the right type of ADU depends on your available space and intended use. Detached ADUs offer more privacy, while attached units or garage conversions can be more cost-effective. Each option comes with its own advantages, so evaluating your property layout is key.
Find answers to common questions about our services, process, timelines, and what to expect when working with our team.
Permits vary by location, but we handle all approvals to ensure compliance with local regulations.
Most ADU projects take 3–6 months depending on size, design, and permitting.
Yes, ADUs are commonly used as rental units, but local rules may apply.
Absolutely. ADUs can increase property value and provide steady rental income.
Yes, garage conversions are one of the most popular and cost-effective ADU options.
