How to Add a Laundry Room to a San Jose Home in 2025 — Cost, Design, and Options

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Quick Answer: Adding a dedicated laundry room to a San Jose home costs $5,000-$40,000 depending on scope: converting an existing closet or hallway alcove with laundry hookups already nearby costs $5,000-$12,000 (new washer/dryer boxes, drain, electrical, tile floor, cabinet above); moving laundry from the garage to a new interior location costs $8,000-$20,000 (plumbing rough-in, electrical, flooring, door); adding a full new laundry room as part of a room addition costs $20,000-$45,000. The most expensive part is always the plumbing — getting hot/cold supply and a proper drain (with a P-trap and indirect drain box) to a location that doesn’t already have one.

Laundry Room Addition Options for San Jose Homes

Helpful Resources:

Option 1: Convert Existing Space with Nearby Plumbing

The most cost-effective laundry room addition repurposes an existing space close to existing plumbing: a hall closet next to a bathroom, a pantry adjacent to the kitchen, or a large coat closet near a utility room. Cost: $5,000-$12,000. A closet that’s at least 36 inches deep and 60 inches wide can accommodate a stacked washer/dryer unit. 72 inches wide accommodates side-by-side units with a small folding counter above.

Option 2: Move Laundry from Garage to Interior

Many San Jose homes have laundry in the garage — a common and convenient setup but often inconvenient for two-story homes. Moving laundry to a first-floor utility room, main hallway, or a built-out closet requires running new plumbing (supply and drain) to the new location, installing a 240V dryer outlet, and adding ventilation for the dryer exhaust. Cost: $8,000-$20,000 depending on plumbing run distance. Frequently combined with a bathroom addition or kitchen remodel when walls are already open.

Laundry Room Feature Checklist

Utility sink: Invaluable for hand-washing, pre-treating, and pet clean-up. Must have hot and cold supply and a drain. Add $1,500-$4,000
Countertop above front-load machines: 24-inch deep counter over front-load washer/dryer provides folding surface and hides machines. Uses stock butcher block or laminate
Upper cabinets for detergent and supplies: Wall-mount cabinets above the counter keep cleaning supplies off the counter and off the floor
Dedicated hanging bar: A 12-24 inch hanging bar (or retractable rod) for air-drying delicate items is used constantly in most households
Tile or LVP flooring: Never carpet — laundry rooms see spills, overflows, and water. Tile is preferred for water resistance
Recessed electrical outlets: Rear-recessed outlet boxes allow the washer/dryer to sit tight against the wall without crushing the power cord behind them

Quartz Construction designs and builds laundry room additions and conversions throughout San Jose. Learn about room additions. CSLB #1003436 | Call (650) 749-7436.

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Google Reviews — What Our Clients Say

      
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   Perry Finch 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’re so happy with the work Hila and her team did on our home addition. The new space flows beautifully with the existing structure, and the quality is clear in every finish. Finished on schedule and stress-free.
  
 
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   Joy Ruther 
 
 
 
 Trustindex verifies that the original source of the review is Google. Working with Ohad on our full home remodel was an incredible experience. He helped us through every decision and made sure everything turned out exactly how we envisioned. The team was easy to communicate with and super detail-focused. We still can’t believe how beautiful our home looks!
  
 
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   Ajay Mukhopadhyay 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently worked with Quartz Construction (Owner: Ohad) for a construction project to remodel our Bathroom and we couldn’t be more pleased with the results. From start to finish, their team demonstrated professionalism, and exceptional craftsmanship. They maintained clear communication throughout the project, kept us informed of progress and any potential changes, and delivered everything on time and within budget. Their quality of work is outstanding — every detail was handled with care and precision. What stood out most was their commitment to customer satisfaction. They were responsive to our questions, respectful of our space, and ensured that the final outcome matched our vision perfectly. If you're looking for a reliable, skilled, and trustworthy construction contractor, I wholeheartedly recommend Quartz Construction ( Ohad and his team) .They exceeded our expectations in every way. Ajay
  
 
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   debbie curley 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a fantastic experience working with Quartz Construction And Remodeling. Ohad Maloul the owner was professional communicative and a pleasure to work with from start to finish. His team repaired and painted my backyard pergola and the quality of their work was truly excellent. They were always on time, friendly and responsive to any questions I had throughout the process. I appreciated the clear communication and attention to detail. I’m excited to work with Ohad and his team on future projects and highly recommend them to anyone looking for reliable, high-quality construction or remodeling services.
  
 
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   Harry Lewis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Hila managed our balcony addition project with care and precision. The design complements our home perfectly, and the build quality is outstanding. She communicated every step and made the whole process easy. We’re thrilled with the result!
  
 
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   Qi Lei 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had the chance to work with Ohad and his construction team on a recent home project, and I was really impressed. Ohad is professional, easy to communicate with, and genuinely cares about the quality of the work. The crew showed up on time, kept the work area clean, and finished the job on schedule. It’s hard to find contractors who are reliable and transparent these days, but Ohad delivered on everything he promised. Would definitely recommend if you’re looking for someone who takes pride in their work and keeps things straightforward.
  
 
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   Boris Tyron 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’re so happy with the work Quartz Construction did on our backyard. Ohad’s team designed and built a gorgeous deck and patio that turned the area into a dream space. The quality and detail are fantastic. Highly recommend!
  
 
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   Gloria Collin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quartz Construction built the most beautiful pergola in our backyard, thanks to Ohad. He was easy to work with, listened to our needs, and delivered a structure that’s both stylish and durable. We now have a shaded space where we can relax and entertain guests.
  
 
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   Dustin Walsh 
 
 
 
 Trustindex verifies that the original source of the review is Google. They built a beautiful, durable pergola that fits our outdoor space perfectly. Hila paid close attention to both style and quality. We now have the perfect spot for lounging, gatherings, and enjoying every season.
  
 
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   Paul Wilins 
 
 
 
 Trustindex verifies that the original source of the review is Google. We feel incredibly lucky to have worked with Hila. She made the ADU process simple and stress-free, handling everything with care and professionalism. The final space is perfect—efficient, elegant, and exactly what we hoped for. Big thanks to her and the whole crew!
  
 
  
  
 
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