Room additions, second stories & home expansions by licensed Bay Area contractors.
Tell us about your project — we respond within 24 hours.
What Homeowners Say
“Nave managed our home renovation efficiently and professionally. He respected our space, timeline, and budget. The final result exceeded expectations.”
Dave Grissom
San Jose, CA
“Great price. We hired Madison Remodeling Group for a complete home remodel, and we’re extremely happy with the results.”
Leon Karni
Bay Area, CA
“Omer was dependable, meticulous, and a pleasure to work with. The final product looks fantastic, and the renovation process went without a hitch.”
Noah Onger
Santa Clara, CA
How It Works
We visit your property, evaluate the structure, and discuss your vision and goals for the addition.
We create detailed architectural plans and handle all permit applications with the City of San Jose.
Our licensed crew builds with precision, keeping you updated at every milestone through final inspection.
Common Questions
Home additions in San Jose typically run between $300 and $650 per square foot, depending on structure type, foundation work, and finish level. Ground-floor room additions usually cost less than second-story expansions that require major structural reinforcement. In Bay Area projects, permit complexity and utility relocation can significantly influence total budget. Most homeowners budget between $150,000 and $400,000 for a meaningful addition.
Most San Jose home additions take 4 to 8 months from design through final inspection. Smaller bump-outs can move faster, while second-story additions typically take longer due to engineering and phased inspections. Maison Remodeling Group provides milestone-based schedules so homeowners can plan living arrangements during construction. Permit review with the City of San Jose is often the longest lead-time item.
Yes — San Jose requires permits for home additions because structural, electrical, and mechanical reviews are all involved. Setback, lot coverage, and height limits must be verified before construction begins. We handle the entire permit process for you, from application to final sign-off. Permitted work protects your safety, insurance coverage, and future resale value.
Get a no-obligation estimate from San Jose’s trusted home addition contractors. Free site visit included.
