Quick Answer: Adding a mudroom to a San Jose home costs $8,000-$25,000 to convert an existing space (entry foyer, hallway, or attached garage area) into a dedicated mudroom — this covers built-in lockers or cubbies, bench, hooks, tile flooring, and electrical for lighting. Creating a mudroom as a new addition costs $25,000-$60,000 for a 60-100 sq ft enclosed mudroom addition, including foundation, framing, roofing, insulation, drywall, and all finishes. The most popular mudroom features in Bay Area homes are: built-in cubby lockers with bench and storage above ($3,000-$8,000 for custom cabinetry), tile flooring with drain for wet gear, coat hooks at adult and kid heights, and a utility sink for dirty hands and pet paws.
Mudroom Addition Cost by Scope — San Jose 2025
| Scope | Cost Range |
|---|---|
| Convert entry foyer to mudroom (built-ins only) | $4,000 – $12,000 |
| Convert laundry room to combined mudroom/laundry | $8,000 – $22,000 |
| Convert garage entry area to mudroom | $6,000 – $18,000 |
| Mudroom addition (new enclosed room, 60-100 sq ft) | $28,000 – $65,000 |
| Mudroom with utility sink add-on | +$2,500 – $6,000 |
| Tile flooring with heated mat | +$2,000 – $5,000 |
Quartz Construction adds mudrooms and laundry/mudroom combos throughout San Jose as part of home renovation projects. CSLB #1003436 | Call (650) 749-7436.
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