Licensed & Active since 1988 (#541059)
NorCal’s Most Reliable ADU & Prefab Builders
In an industry of uncertain startups, rely on 37 years of proven stability. We combine the security of a Factory-Direct Dealer with the unshakeable integrity of a firefighter-owned business. No ghosting, no games—just keys in your hand.
In an industry of uncertain startups, rely on 37 years of proven stability. We combine the security of a Factory-Direct Dealer with the unshakeable integrity of a firefighter-owned business. No ghosting, no games—just keys in your hand.
About us
About us
About us
No Sales Reps. No Call Centers. Just Us.
We operate differently. We are a family-owned business, meaning you speak directly with the owners, not a revolving door of sales staff.
From your first site visit to the final inspection, you get our personal attention and a peace of mind that comes from knowing exactly who is responsible for your home.
A Track Record of Reliability
Images are conceptual renderings based on real projects to highlight layouts and design possibilities.
Images are conceptual renderings based on real projects to highlight layouts and design possibilities.
3
3
Years in business
Serving Northern California continuously since 1989. We have weathered every economy and are here to stay.
3
3
Years in business
Serving Northern California continuously since 1989. We have weathered every economy and are here to stay.
3
3
Years in business
Serving Northern California continuously since 1989. We have weathered every economy and are here to stay.
20
20
Projects completed
From single ADUs in Walnut Creek to complex fire rebuilds in Napa. We have seen (and solved) it all.
20
20
Projects completed
From single ADUs in Walnut Creek to complex fire rebuilds in Napa. We have seen (and solved) it all.
20
20
Projects completed
From single ADUs in Walnut Creek to complex fire rebuilds in Napa. We have seen (and solved) it all.
4-8
4-8
Weeks to permit
Our deep relationships with local planning departments allow us to fast-track approvals that take others months.
4-8
4-8
Weeks to permit
Our deep relationships with local planning departments allow us to fast-track approvals that take others months.
4-8
4-8
Weeks to permit
Our deep relationships with local planning departments allow us to fast-track approvals that take others months.
50%
50%
Completion Rate
In an era of unfinished projects, our most important stat is simple: We finish every home we start.
50%
50%
Completion Rate
In an era of unfinished projects, our most important stat is simple: We finish every home we start.
50%
50%
Completion Rate
In an era of unfinished projects, our most important stat is simple: We finish every home we start.
Services
Services
Services
Surprise-Free Build Process
We replace the typical chaos of building with a predictable, transparent roadmap designed to protect your budget and timeline.
Complimentary Site Review & Feasibility
We start with a no-cost walk-through of your property—checking setbacks, utilities, and overall feasibility. Next, we help you choose the prefab or manufactured model that makes the most sense for your lot, budget, and timeline. Clear guidance up front means no rude surprises down the road.
Local Permitting Strategy
All plan sets, engineering calcs, and Title 24 docs are drafted and submitted by our team. We track every comment from city and county reviewers and keep you posted, but you never have to stand in line at the building counter.
Site Preparation & Foundation Work
While your home is being built off-site, our crews are on your land pouring foundations and trenching utilities. By running these two timelines in parallel, we cut your total construction time by up to 50% compared to traditional site-built homes.
Factory Build, Delivery & Set-Up
Your home is constructed indoors under strict QC, then trucked and craned onto the foundation in a single day. We bolt, seal, and weather-proof the structure, connecting all utilities with minimal neighborhood disruption. Indoor fabrication plus rapid on-site assembly means you’re weeks—not months—away from move-in.
Final Keys & Warranty
Our team completes the foundation, siding, roofing tie-ins, interior trim, and any custom finish items, then walks the whole job with you for sign-off. We handle the final inspection so you get a green tag without the stress. You walk in with keys in hand and a full warranty in place.
Complimentary Site Review & Feasibility
We start with a no-cost walk-through of your property—checking setbacks, utilities, and overall feasibility. Next, we help you choose the prefab or manufactured model that makes the most sense for your lot, budget, and timeline. Clear guidance up front means no rude surprises down the road.
Local Permitting Strategy
All plan sets, engineering calcs, and Title 24 docs are drafted and submitted by our team. We track every comment from city and county reviewers and keep you posted, but you never have to stand in line at the building counter.
Site Preparation & Foundation Work
While your home is being built off-site, our crews are on your land pouring foundations and trenching utilities. By running these two timelines in parallel, we cut your total construction time by up to 50% compared to traditional site-built homes.
Factory Build, Delivery & Set-Up
Your home is constructed indoors under strict QC, then trucked and craned onto the foundation in a single day. We bolt, seal, and weather-proof the structure, connecting all utilities with minimal neighborhood disruption. Indoor fabrication plus rapid on-site assembly means you’re weeks—not months—away from move-in.
Final Keys & Warranty
Our team completes the foundation, siding, roofing tie-ins, interior trim, and any custom finish items, then walks the whole job with you for sign-off. We handle the final inspection so you get a green tag without the stress. You walk in with keys in hand and a full warranty in place.
Complimentary Site Review & Feasibility
We start with a no-cost walk-through of your property—checking setbacks, utilities, and overall feasibility. Next, we help you choose the prefab or manufactured model that makes the most sense for your lot, budget, and timeline. Clear guidance up front means no rude surprises down the road.
Local Permitting Strategy
All plan sets, engineering calcs, and Title 24 docs are drafted and submitted by our team. We track every comment from city and county reviewers and keep you posted, but you never have to stand in line at the building counter.
Site Preparation & Foundation Work
While your home is being built off-site, our crews are on your land pouring foundations and trenching utilities. By running these two timelines in parallel, we cut your total construction time by up to 50% compared to traditional site-built homes.
Factory Build, Delivery & Set-Up
Your home is constructed indoors under strict QC, then trucked and craned onto the foundation in a single day. We bolt, seal, and weather-proof the structure, connecting all utilities with minimal neighborhood disruption. Indoor fabrication plus rapid on-site assembly means you’re weeks—not months—away from move-in.
Final Keys & Warranty
Our team completes the foundation, siding, roofing tie-ins, interior trim, and any custom finish items, then walks the whole job with you for sign-off. We handle the final inspection so you get a green tag without the stress. You walk in with keys in hand and a full warranty in place.
Don't Just Take Our Word.
Ask Our Neighbors.
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
Don't Just Take Our Word.
Ask Our Neighbors.
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
Don't Just Take Our Word.
Ask Our Neighbors.
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
“We've worked with MyPrefabHomes on a couple projects and were thoroughly impressed by their professionalism and the quality of their work. They completed the project on time and within budget, making our dream of adding a functional and stylish space to our property portfolio a reality. ”
Joe Stokley, Jr. - Stokley Properties, Inc.
"I purchased a Silvercrest manufactured house through JPW Development as an ADU for my aging in-laws. I couldn't be happier with my decision. The Silvercrest product is a quality home that exceeded our expectations. More importantly I was incredibly impressed with the professionalism and expertise of the JPW Development team. Overall, I couldn't be more pleased with experience and my new ADU from JPW Development."
Mrs. O'Gara
"We really enjoyed working with John Piccolo Wignall and his wife Terri on the purchase of our manufactured home. They kept us informed on the status of construction. From start to finish all involved were great at communicating with us, fair with us when unexpected expenses arose, and completed the project in a timely manner. I highly recommend JPW Development Co on a project like ours!"
Jenny Aroyo
More Trusted Models
More Trusted Models
More Trusted Models
FAQs
Can you help with the new fee waivers in Sacramento/Contra Costa?
Can an ADU connect to my existing utilities -- water, sewer, electrical?
How long will it take to build the home?
Can I finance an ADU?
Where do the homes come from?
How long does the entire process take once a customer selects a model?
Will I be required to install solar panels on the home?
How energy efficient are manufactured homes?
Does the home come with air conditioning?
Does the home come with a deck or porch?
Can you help with the new fee waivers in Sacramento/Contra Costa?
Can an ADU connect to my existing utilities -- water, sewer, electrical?
How long will it take to build the home?
Can I finance an ADU?
Where do the homes come from?
How long does the entire process take once a customer selects a model?
Will I be required to install solar panels on the home?
How energy efficient are manufactured homes?
Does the home come with air conditioning?
Does the home come with a deck or porch?
Have other questions? Call us or leave us a message by using our contact form.
Can you help with the new fee waivers in Sacramento/Contra Costa?
Can an ADU connect to my existing utilities -- water, sewer, electrical?
How long will it take to build the home?
Can I finance an ADU?
Where do the homes come from?
How long does the entire process take once a customer selects a model?
Will I be required to install solar panels on the home?
How energy efficient are manufactured homes?
Does the home come with air conditioning?
Does the home come with a deck or porch?
Can you help with the new fee waivers in Sacramento/Contra Costa?
Can an ADU connect to my existing utilities -- water, sewer, electrical?
How long will it take to build the home?
Can I finance an ADU?
Where do the homes come from?
How long does the entire process take once a customer selects a model?
Will I be required to install solar panels on the home?
How energy efficient are manufactured homes?
Does the home come with air conditioning?
Does the home come with a deck or porch?
Start Your Project on Solid Ground
Don't guess at costs or permit timelines. Get a clear, honest feasibility assessment from the team that has been building here for over 37 years.
Start Your Project on Solid Ground
Don't guess at costs or permit timelines. Get a clear, honest feasibility assessment from the team that has been building here for over 37 years.
Start Your Project on Solid Ground
Don't guess at costs or permit timelines. Get a clear, honest feasibility assessment from the team that has been building here for over 37 years.
