Sunroom Addition Cost Bay Area 2025 — Four-Season Sunrooms & Screen Rooms

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Categories: Architecture

Quick Answer: A sunroom addition in the Bay Area costs $30,000–$120,000 depending on size and construction type. A prefab aluminum-frame screen room or three-season sunroom runs $15,000–$35,000. A fully permitted, stick-built four-season sunroom (with insulation, HVAC, and finished interior) costs $50,000–$120,000+ for a 200–400 sq ft addition. Bay Area sunrooms require building permits and must meet Title 24 energy standards, including double-pane Low-E glass and R-value minimums for walls and ceiling.

Sunroom Types and Costs for Bay Area Homes 2025

Helpful Resources:

Sunroom Type	Construction	Cost Range	Best For
Screen room / patio enclosure	Prefab aluminum + screen	$8,000–$20,000	Mild Bay Area coastal cities
Three-season sunroom	Prefab + single or double glazing	$20,000–$45,000	San Jose, inland cities (temp swings)
Four-season sunroom (stick-built)	Insulated walls + Low-E glass + HVAC	$50,000–$90,000	Year-round use; all Bay Area cities
Conservatory / luxury solarium	Full glass roof + masonry + radiant heat	$80,000–$150,000+	Saratoga, Los Altos, Palo Alto luxury homes

Do Bay Area Sunrooms Need Building Permits?

Yes — any permanent sunroom addition in the Bay Area requires a building permit. This includes prefab sunroom kits installed on a permanent foundation. San Jose’s permit process for a sunroom addition typically takes 4–8 weeks and requires Title 24 energy compliance calculations (U-factor for windows, R-value for insulation), structural drawings for the foundation and roof connections, and electrical drawings if HVAC or lighting is included.

Title 24 glass requirements: Bay Area sunrooms must use Low-E dual-pane glass (U-factor ≤ 0.32 in most zones) — significant upgrade from standard window glass
Foundation: Most sunrooms require a concrete perimeter foundation or monolithic slab — not just piers
Roofline connection: Attaching a sunroom roof to the existing home requires flashing, waterproofing, and sometimes structural modifications where it meets existing eaves

Frequently Asked Questions

Does a sunroom increase home value in the Bay Area? Yes — a well-built, fully permitted four-season sunroom adds 5–15% to a Bay Area home’s appraised value. In the Bay Area’s year-round outdoor-living climate, livable sunrooms are highly valued by buyers. Unpermitted sunrooms — common with DIY kits — can actually hurt value by creating disclosure obligations and creating concerns for buyers’ lenders and inspectors.

Can I use a Bay Area sunroom in winter? It depends on construction type. Three-season rooms (no insulation, single or dual-pane glass) are cold in December–February in inland Bay Area cities (San Jose averages lows of 38–42°F in January). A four-season sunroom with proper insulation (R-13 walls, R-38 ceiling) and a mini-split system provides year-round comfort in all Bay Area climates.

Quartz Construction & Remodeling (CSLB #1003436) designs and builds permitted sunroom additions throughout San Jose and the Bay Area. Call (650) 749-7436 for a free site assessment and sunroom design consultation.

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Call: (650) 749-7436

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What our clients say on Google

Verified reviews from our Google Business Profile. See all reviews on Google.

      
   Quartz Construction
   65 Google reviews 
  Write a review 
  
 
 
   
 
 
       Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
      Posted on Google  
   
   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
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Get a Free Estimate from Quartz Construction

Licensed General Contractor • CSLB Lic#1003436 • Serving San Jose, Santa Clara & Bay Area

Google Reviews — What Our Clients Say

      
   Quartz Construction
   65 Google reviews 
  Write a review 
  
 
 
   
 
 
       Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
      Posted on Google  
   
   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
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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.
  
 
      Posted on Google  
   
   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!
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Get Your Free Estimate

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Phone: (650) 749-7436

Address: 1777 Hamilton Ave #1080, San Jose, CA 95125

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Sunroom Addition Cost Bay Area 2025 — Four-Season Sunrooms & Screen Rooms

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Sunroom Types and Costs for Bay Area Homes 2025

Do Bay Area Sunrooms Need Building Permits?

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