By IGreen Builders Inc. | Bay Area Design-Build Experts
Thinking about adding an ADU (Accessory Dwelling Unit) to your Bay Area property? You’re not alone. With rising home prices, housing shortages, and California’s supportive legislation, building an ADU has become one of the smartest investments for homeowners.
At IGreen Builders Inc., we specialize in design-build ADU construction throughout the Bay Area — from San Jose to San Francisco and everywhere in between. Here’s what you need to know before starting your ADU project:
- Understand ADU Types
There are several types of ADUs you can build:
- Detached ADUs: A separate structure, often in the backyard
- Attached ADUs: Connected to your main home but with separate entry
- Garage Conversions: Turn your existing garage into a livable space
- Basement/Interior Conversions: Maximize underused square footage
Each option has its own cost, timeline, and permit requirements.
- Know the Legal Requirements
Thanks to California Senate Bill 9 and 13, many zoning restrictions have been relaxed:
- No minimum lot size for ADUs
- Up to 1,200 sq ft allowed (depending on lot size and city)
- No impact fees for ADUs under 750 sq ft
- One ADU + one JADU allowed on a single-family lot
Still, each city in the Bay Area (like Mountain View, Sunnyvale, San Jose) may have its own local guidelines — and we help you navigate them.
- Plan Your Budget and Timeline
A well-designed ADU can cost anywhere from $150,000 to $350,000+, depending on finishes, size, and site conditions.
Expect a timeline of 6–9 months, including design, permits, and construction.
Tip: Our clients often use HELOCs, construction loans, or refinance to fund their projects. We’ll help you explore financing options that make sense. - Work With a Trusted ADU Contractor
Choosing a licensed, insured, and experienced contractor is essential. IGreen Builders is proud to offer:
- End-to-end project management (design, permits, construction)
- Transparent milestone-based payment schedules
- Experienced team familiar with local codes and permit offices
- A proven track record in custom ADUs throughout the Bay Area
- Think Long-Term
An ADU can increase your property’s value, generate passive income, or provide housing for family. Whether it’s a rental unit, in-law suite, or home office, we design with your future goals in mind.
Ready to Start Your ADU Project?
IGreen Builders Inc. is here to turn your property into its full potential.
Contact us today for a free consultation and let’s build smarter — together.
Phone: 800-471-0585
Email: info@igreenbuilders.com
Website: www.igreenbuilders.com