Home Addition Construction in San Jose, CA
When your family outgrows your current space, a home addition is the most cost-effective way to gain square footage without moving. San Jose ADU & Remodeling builds seamless home additions that match your existing architecture and significantly increase your home's value and livability.
Unlike a simple room addition , a full home addition may involve expanding multiple rooms, adding a second story, or creating a connected in-law suite.
Second-Story Additions
Add a full floor to your home without sacrificing yard space.
Bump-Out Additions
Small targeted expansions of a kitchen, bedroom, or bathroom.
In-Law Suites
Connected private quarters for family members with separate entrance options.
Sunroom Additions
Glass-enclosed living spaces that bring the outdoors in year-round.
Home Addition vs. ADU: Which Should You Choose?
A home addition integrates directly with your existing structure and can't be rented independently. An ADU is a separate unit that qualifies for independent rental. Our detailed FAQ explains: Home Addition vs ADU: Which Is Right for You?
Home Addition Cost Factors
- Square footage added
- Type (ground-floor vs. second story)
- Foundation work required
- Roof tie-in complexity
- Interior finishes and fixtures
- Plumbing and electrical scope
Planning Your Home Addition
We handle permits, engineering drawings, and contractor coordination. Visit our permit FAQ to learn what's required, and contact us for a free site assessment.