We turn underused spaces into functional living areas that add real value to your property.
Trusted by homeowners in San Diego and surrounding areas
We handle design, permits, and construction under one roof. You won't need to chase down separate architects, engineers, or subcontractors.
We know the City of San Diego's permitting process inside and out. That means fewer delays and less back-and-forth with the planning department.
You get a detailed estimate before any work begins, and we don't pad invoices with surprise charges. What we quote is what you pay.
We build standalone ADUs in San Diego backyards, from foundation to finish. These units are ideal for rental income, multigenerational living, or a private home office.
Turn your unused garage into a livable ADU without the cost of a ground-up build. We handle structural upgrades, insulation, plumbing, and everything in between.
We redesign and rebuild kitchens that work better for how you actually cook and live. From layout changes to cabinet installation, every detail is handled in-house.
We offer a full range of remodeling and ADU services tailored to San Diego's building codes and neighborhood styles. Take a look at what we do and let us know how we can help with your next project.
Call or send a request with the property details, the service you need, and anything important about the project in San Diego.
We review the request, explain the service path, and make the scope feel easy to understand before work begins.
The work is completed with the same focus on communication, professionalism, and follow-through that customers expect from Alder ADU Specialists.
We handle design, permits, and construction under one roof. You won't need to chase down separate architects, engineers, or subcontractors.
We know the City of San Diego's permitting process inside and out. That means fewer delays and less back-and-forth with the planning department.
You get a detailed estimate before any work begins, and we don't pad invoices with surprise charges. What we quote is what you pay.
We select materials and construction methods suited to Southern California's weather and conditions. Your remodel or ADU is built to hold up, not just look good on day one.
The website is built to make the business feel professional, easy to contact, and grounded in the neighborhoods it serves.
"Alder built a detached ADU in our backyard and the whole process was way smoother than I expected. They kept us in the loop every week and the finished unit looks like it was always part of the property."
"We hired them for a garage conversion and they handled everything from permits to the final inspection. The space turned out better than we imagined—our daughter actually wants to live in it now."
"Had our kitchen completely remodeled and the crew was respectful, on time, and really knew what they were doing. It's been six months and we still walk in and smile every morning."
Have a question? We've got answers. If you don't see what you're looking for, give us a call.
Call (858) 737-1924ADU costs in San Diego typically range from $150,000 to $350,000 or more depending on size, site conditions, and finishes. Garage conversions tend to fall on the lower end since the shell already exists. We provide detailed estimates after an on-site evaluation so you know exactly what to expect.
Yes, the City of San Diego requires permits for ADU construction, including garage conversions. California state law has streamlined the process significantly, but there are still specific requirements around setbacks, size limits, and utility connections. We handle the entire permit process for every project we take on.
Most detached ADU builds take between four and eight months from permit approval to completion. Garage conversions are usually faster, often in the three-to-five-month range. Permitting timelines with the city can add additional weeks, which is why we submit applications as early as possible.
California law generally prevents HOAs from outright banning ADUs, but some associations may have design guidelines you need to follow. We recommend checking with your HOA early in the process, and we can help you navigate any design restrictions that come up.
A junior ADU (JADU) is built within the existing footprint of your home and is limited to 500 square feet. A standard ADU can be detached or attached and can be up to 1,200 square feet in many cases. We can help you figure out which option makes the most sense for your property and goals.
We manage design and permitting in-house so you don't have to coordinate between multiple companies. Our team prepares plans, submits them to the City of San Diego, and handles any revisions or corrections that come back. It keeps the process simpler and faster for you.
Contact us today for a free, no-obligation estimate. We serve San Diego and surrounding areas.
