Room additions and ADUs (including JADUs) are one of the most effective ways to add space, functionality, and long-term value to your property. They allow you to create extra living areas, rental units, guest rooms, or workspace without needing to relocate. With proper planning and professional design, the entire project becomes efficient, organized, and stress-free.
Cardiff homes often feature coastal designs, open layouts, and modern architectural styles. Whether you’re expanding a small room or building a detached ADU near the shoreline, our team delivers plans that enhance comfort, flow, and property value.
We provide strong local experience, clear communication, and precise architectural planning designed for Cardiff’s modern coastal neighborhoods. Homeowners trust us for our quality, organization, and professional approach.
We discuss your goals, assess your home’s structure, and outline a detailed plan that fits your layout and budget.
Our designers prepare accurate floor plans, 3D visuals, and engineered layouts tailored to Cardiff’s coastal home styles and your specific space requirements.
We finalize all architectural and structural drawings, ensure full compliance with ADU/JADU regulations, and prepare everything 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:
High-quality 3D previews that help you understand your new living space before construction.
Room layouts, elevations, and measurements designed for smooth, accurate building.
Safe, code-compliant framing, load calculations, and structural designs.
Complete wiring, lighting, plumbing, HVAC, and mechanical planning.
Fully detailed plans crafted for fast approval and a streamlined construction process.
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 deliver complete planning, 3D designs, and engineering services for room additions, ADUs, and JADUs tailored to Cardiff’s unique property styles. Our team handles every detail to ensure clarity, accuracy, and a smooth project experience.
Contact us today to schedule your free consultation and begin expanding your home with confidence.
A common mistake when building an Accessory Dwelling Unit (ADU) is not thoroughly understanding local zoning ordinances and permit requirements before starting, which can lead to costly delays or redesigns. Homeowners often underestimate the total budget, failing to account for site preparation, utility connections, and finishing costs. Choosing the wrong contractor or attempting a DIY approach for complex systems like plumbing and electrical is another frequent error. To avoid these pitfalls, comprehensive planning is essential. For a detailed guide on navigating these challenges, see our internal article All You Need to Know When Building Accessory Dwelling Units, which covers everything from feasibility studies to final inspections and compliance.
When deciding between adding on or building up, cost depends on several factors. A ground-level addition often requires foundation work, which can be expensive, but avoids complex structural modifications to the existing home. Building up, or adding a second story, typically saves on land costs and may not require expanding the foundation, but it necessitates a thorough structural assessment and potentially reinforcing the existing first-floor structure. Generally, building up can be more cost-effective per square foot if the existing foundation and framing can support the load, while building out is often simpler but consumes yard space. A professional assessment from a structural engineer and builder is crucial for an accurate comparison and to ensure compliance with local zoning laws.
Yes, adding an addition to a split-level home is a common and viable project, though it requires careful planning due to the home's unique staggered floor levels. The key is to design the addition to complement the existing rooflines and floor level changes, often by extending the main living area or adding a room over the garage. Structural considerations are paramount, as the foundation and load-bearing walls must be properly integrated. Working with a design-build firm experienced in split-level renovations is crucial to ensure the new space feels like a natural, cohesive part of the original home, maintaining flow and maximizing the property's value and functionality.
Adding an addition to a manufactured home is a complex project that requires careful planning and adherence to specific codes. The primary difficulty lies in the structural differences from site-built homes. Manufactured homes are engineered as a single, transportable unit on a permanent steel frame. Attaching a conventional, foundation-based addition requires professional engineering to ensure the existing home's structure is not compromised and that the new section is properly supported. You must also navigate local zoning laws, obtain permits, and ensure the addition meets the HUD Code or the relevant building code for your area. Hiring a contractor experienced with manufactured homes is strongly recommended to address these unique challenges successfully.
The cost of a room addition or ADU/JADU construction in Cardiff varies significantly based on size, complexity, and finishes. A basic interior conversion for a JADU might start in the $80,000 to $120,000 range, while a new detached ADU can easily exceed $200,000. Key cost factors include site preparation, foundation work, utility connections, materials, and permit fees from the City of Cardiff. It is crucial to budget for professional design, engineering, and a contingency fund for unforeseen issues. For a detailed breakdown of local considerations and the value these projects add, we recommend reading our internal resource, Room Addition / ADU (JADU) Construction in Cardiff. Always obtain multiple detailed quotes from licensed contractors.
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