Room additions and ADUs (including JADUs) are one of the most practical ways to increase living space, improve comfort, and raise long-term property value. Whether you want a rental unit, guest suite, or extra living space, these additions allow you to expand without moving. With proper planning and a professional team, the process becomes smooth, organized, and stress-free.
El Cajon homes range from classic suburban designs to larger hillside properties. Whether you’re extending a bedroom or building a detached ADU, we design spaces that improve layout, flow, and functionality.
We offer strong local experience, organized project planning, and clear communication. El Cajon homeowners trust us for high-quality architectural and ADU design.
We review your goals, inspect the home layout, and create a clear plan that fits your needs and budget.
Our designers prepare accurate floor plans, 3D visuals, and engineered layouts customized for El Cajon’s varied home styles.
We finalize all structural and architectural plans, ensure full code compliance, and prepare the project for construction.
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:
Realistic 3D previews that help you understand your new space before building begins.
Accurate drawings, room layouts, and elevations for smooth construction.
Safe, fully engineered structural diagrams and load calculations.
Complete planning for lighting, wiring, HVAC, and plumbing systems.
Fully detailed plans prepared for fast city approval.
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!
I recently hired Golden Shore Design and Build to paint my kitchen cabinets, and I couldn’t be happier with the results! From start to finish the team was professional, punctual, and incredibly detail-oriented. They took the time to explain the process, offered helpful color suggestion, and made sure every step was done right.
The transformation is amazing – my kitchen looks brand new! The finish is smooth and flawless, and they left everything clean and tidy once the job was done. I really appreciated their respect for my home and the care they put into their work.
If you’re considering giving your cabinets a fresh new look, I highly recommend Golden Shore Design and Build. They exceeded my expectations, and I’d gladly work with them again.
CG Escondido
We added a family room to the back of our house and this team handled everything from permits to finish work. They made sure the new space blended perfectly with the existing structure. Super happy with the result and the process.
We provide complete planning, 3D designs, and engineering services for room additions, ADUs, and JADUs tailored to El Cajon homes.
Contact us today to schedule your complimentary consultation.
The cost per square foot to build an Accessory Dwelling Unit (ADU) in San Diego varies significantly based on design, materials, site conditions, and finishes. As of current industry standards, you can expect a range from approximately $300 to $550 per square foot for a fully permitted, turnkey construction. A basic, detached ADU with standard finishes typically starts at the lower end, while custom designs with high-end appliances, complex foundations, or premium materials will reach the higher figures. These costs encompass design, permits, construction, and basic utility connections. For a more detailed breakdown of costs, process, and local considerations, we recommend reviewing our internal resource, Room Addition / ADU (JADU) Construction in San Diego. Always obtain multiple detailed quotes from licensed contractors for an accurate project-specific estimate.
The cost to build an Accessory Dwelling Unit (ADU) in Los Angeles County varies widely based on size, design, and site conditions. For a basic, detached 500-square-foot unit, you can expect costs starting around $200,000. More complex designs, larger units (up to 1,200 sq ft), or projects requiring significant site work can easily reach $400,000 or more. Key cost drivers include foundation work, utility connections, permit fees, and material choices. It's crucial to obtain detailed quotes from licensed contractors familiar with local ADU ordinances. For a complete breakdown of costs, regulations, and planning steps, we recommend our internal resource: All You Need to Know When Building Accessory Dwelling Units.
The cost to build an Accessory Dwelling Unit (ADU) in Anaheim, CA, typically ranges from $150,000 to $400,000 or more. This wide variation depends on factors like size, design complexity, foundation type, and interior finishes. A basic prefabricated or simple detached unit starts at the lower end, while a custom, high-end ADU with premium amenities can exceed $400,000. Key cost drivers include site preparation, utility connections, permit fees specific to Anaheim, and current material and labor costs. It is crucial to budget for soft costs like architectural plans, engineering, and city permits, which can add 10-20% to the total. Obtaining detailed quotes from licensed local contractors who understand Anaheim's specific building codes and ADU ordinances is the most reliable way to determine an accurate project budget.
The cost to build an Accessory Dwelling Unit (ADU) in Chico, CA, typically ranges from $150,000 to $400,000 or more. This wide variation depends on factors like the unit's size, complexity, foundation type, and finish level. A basic prefabricated or garage conversion might start at the lower end, while a new, custom-built detached ADU with high-end finishes and full utilities will reach the higher range. Key cost drivers include site preparation, utility connections, permit fees specific to Butte County and Chico, and material choices. It is crucial to obtain detailed quotes from licensed local contractors who understand the area's specific zoning regulations and soil conditions, as these can significantly impact the final budget.
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