Room additions and ADUs (including JADUs) are one of the best ways to increase space, add comfort, and boost long-term property value. Whether you want a peaceful guest suite, a backyard ADU, or a private workspace, these upgrades help improve lifestyle and functionality. With proper planning and experienced designers, your project becomes seamless and stress-free.
Ocean Beach homes often feature coastal layouts, beach-style designs, and compact lots—making smart planning essential for room expansions and ADU builds.
We offer strong local experience, reliable communication, and detailed planning tailored to Ocean Beach homes. Clients trust us for professional organization and high-quality work.
We discuss your goals, assess your home, and create a plan that fits your needs.
Our designers prepare accurate 3D models, layouts, and engineered plans tailored for coastal-style homes.
We finalize all drawings, meet code requirements, and prepare everything for permits and construction. Clear, high-quality previews of your new space.
At Golden Shore Design and Build, we don’t just renovate Houses — we transform them into functional, beautiful spaces tailored to your lifestyle. Here’s why so many homeowners trust us with their Home remodels:
Clear, high-quality previews of your new space.
Accurate measurements, layouts, and elevations.
Safe and stable designs built to code.
Full planning for all essential home systems.
Complete plans crafted for fast approval.
We recently had our outdated bathroom remodeled by Golden Shore Design and Build, and Chris was exceptional throughout the entire process. His attention to detail and commitment to quality truly transformed our space into a luxurious retreat. I highly recommend their services for anyone looking to upgrade their home.
The whole house renovation gave our place a fresh new feel. Each room flows naturally into the next. We are proud of how it all turned out
We recently finished a complete kitchen renovation and are very satisfied with our construction and renovation firm. From the initial design consultation through to the final walk-through, the staff at this company displayed a remarkable level of professionalism and knowledge. Our project manager kept us fully apprised of the progress through daily updates and was very responsive to all of our inquiries. The staff were very considerate, on time, and maintained a remarkably clean construction site, causing little disruption to our daily routine. The workmanship is of the highest quality, and they completed the project right on time and within the agreed-upon budget with no surprises.
Professional builders providing neat finishes and smooth project coordination.
The remodel on our place included a few tricky parts but this team knew exactly what they were doing. Their design sense made the layout flow better than it ever has. It feels like a real upgrade in terms of value.
I brought them in for a full home remodel and the whole experience felt smooth and straightforward. Their design ideas actually made the renovation feel exciting instead of stressful. You can tell the builders care about a quality build from start to finish.
I hired them for a residential remodel, and I’m blown away by the results. The design process was smooth and collaborative, which made the whole project stress-free. These guys really know how to deliver a great renovation.
My bathroom and kitchen renovation turned out strong across the board. Their remodel contractor kept communication easy and never made things confusing. The quality build shows and the place feels refreshed in the best way.
I had this business remodel two bathrooms and both turned out perfect. They made sure I was comfortable while the work was being done. The results speak for themselves.
Their team was thorough, explaining the issue and the best solution without pushing unnecessary work. The repair was done on time, and our home feels solid again highly recommend their expertise!
We provide complete planning, 3D designs, and engineering for ADUs, JADUs, and room additions suited for Ocean Beach’s coastal homes. Contact us today for your free consultation and begin your project with confidence.
The cost of a 20x20 room addition varies significantly based on location, materials, and complexity, but a general range is between $80,000 and $200,000. This translates to roughly $200 to $500 per square foot. A basic, single-story addition with standard finishes typically falls on the lower end. Costs increase with multiple stories, high-end materials (like custom cabinetry or hardwood flooring), complex foundations, plumbing for bathrooms or kitchens, and extensive electrical work. Key factors include site preparation, permits, labor, and the quality of finishes. It is crucial to obtain detailed quotes from licensed contractors that account for all these variables to avoid unexpected expenses.
The cost comparison between adding an addition and building an Accessory Dwelling Unit (ADU) is complex. Generally, a simple bump-out addition can be less expensive per square foot as it often utilizes existing home systems. However, a detached ADU, while requiring its own foundation and utilities, can be a more strategic long-term investment by creating a separate, income-generating asset. Key factors include site conditions, local permit fees, utility connection costs, and the level of finishes. A major advantage of an ADU is its potential to provide rental income, which can significantly offset financing costs over time. For a detailed breakdown of costs, benefits, and regulations, see our internal resource All You Need to Know When Building Accessory Dwelling Units.
The average cost for a 12x12 (144 sq ft) room addition in the United States typically ranges from $30,000 to $60,000, with a national average around $45,000. This wide range is due to significant variables including geographic location, site accessibility, and the quality of materials. A basic, unfinished space on a simple foundation will be at the lower end, while a fully finished bedroom, home office, or living area with plumbing, electrical, HVAC, and high-end finishes can reach the higher end or exceed it. Key cost factors include foundation work, roofing, siding to match the existing house, interior finishes, and permitting fees. It is crucial to obtain detailed quotes from licensed contractors, as site-specific challenges like soil conditions or the need for new utility lines can substantially impact the final price.
The cost of a 10x10 room addition typically ranges from $20,000 to $50,000, with a national average around $30,000 to $40,000. This wide variation depends heavily on factors like the room's purpose, construction complexity, and material quality. A basic sunroom or screened porch will be at the lower end, while a kitchen or bathroom addition with plumbing, electrical, and high-end finishes will be at the higher end. Key cost drivers include foundation work, roofing, siding, interior finishes, and permitting fees. It is crucial to obtain detailed quotes from licensed contractors that account for site preparation, labor, materials, and a contingency for unexpected issues.
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