Royalty Design & Build
Room Addition in Oceanside, CA
Your home should grow with your family not against it.
Licensed, CSLB #1128933
- One team, design to build
- Permits and inspections handled
- Projects across San Diego County
Book a free in-home visit
Tell us about the project. We call you to set a time that works for you.
Free, no obligation. Or call (858) 315-4249.
In their own words
Hear it from San Diego homeowners
Royalty customers on camera, talking about the remodels we built for them.
Luxury bathroom remodelSan Diego
Kitchen remodelLa Mesa
Bathroom remodelCarlsbad
Kitchen remodelSan Diego
Bathroom remodelSan Diego
★★★★★
“Royalty Build and Design makes you feel like royalty! My wife and I had a tub to shower conversion and worked with Lavi as our project manager. We were both impressed with his response time in answering questions and addressing any issues.”
Steve G.Google review · 6 months ago
★★★★★
“We had our bathroom remodeled by Royalty design and build and we’re really happy with how everything turned out. Lavi and his team was easy to work with, showed up when they said they would, and kept us updated throughout the project.”
Zuleidy C.Google review · a month ago
★★★★★
“From start to finish, Gabi (project manager) and Lavi (owner) were exceptional.”
A Google reviewerGoogle review
Reviews quoted from Google, with first name and initial only.
Transform Your Oceanside Home with Custom Room Additions That Fit Your Lifestyle
Your home should grow with your family not against it. At Royalty Design Build, we specialize in home additions and room additions in Oceanside, CA, designed to add beauty, function, and long-term value to your property.
Whether you’re adding a new bedroom, expanding your kitchen, or building a second-story addition, our experienced design-build team ensures every detail blends perfectly with your existing home. We deliver seamless expansions that enhance comfort, flow, and style all while staying on budget and on time.
Comprehensive Home Addition Services in Oceanside, CA
As Oceanside’s trusted home remodeling and room addition contractor, Royalty Design Build offers full-service solutions from design to completion.
Bedroom Additions in Oceanside, CA
Expand your home with a custom bedroom addition designed for comfort, privacy, and style. Whether you need a guest room, a master suite with an en-suite bathroom, or a nursery for a growing family, our team designs spaces that blend seamlessly with your existing floor plan. We ensure your new room adds both beauty and long-term value to your home through smart layouts and high-quality materials.
Bathroom Additions & Expansions
Upgrade your home’s functionality with a modern bathroom addition tailored to your needs. We specialize in spa-style bathrooms, Jack-and-Jill layouts, and master bath extensions featuring luxury fixtures, custom tilework, and efficient plumbing. Every bathroom addition enhances convenience while increasing your Oceanside home’s resale value and comfort.
Family Room Expansions & Living Room Additions
Bring your family closer with a spacious family room expansion that opens your home’s layout and floods it with natural light. From open-concept designs to coastal-inspired living areas, we create environments ideal for entertaining or relaxing. Our Oceanside home expansion contractors focus on seamless transitions between old and new spaces, making your remodel feel like it’s always been part of your home.
Second-Story Home Additions
Maximize your property’s potential with a second-story addition in Oceanside, perfect for homeowners who want more space without losing yard area. We handle structural engineering, design, and construction for upstairs bedrooms, lofts, or offices that capture stunning coastal views. Our design-build remodeling approach ensures your new upper level matches your home’s architecture and aesthetics perfectly.
Home Office & Studio Additions
Work and create in style with a custom home office or studio addition designed for productivity and comfort. Whether you’re setting up a remote workspace, art studio, or music room, we customize your space with soundproofing, built-in storage, and natural lighting. As Oceanside’s leading home addition experts, we ensure every design supports your lifestyle and business needs.
Garage Conversions & ADU Construction
Turn unused square footage into livable space with our garage conversion and ADU (Accessory Dwelling Unit) services. From in-law suites and rental units to guest apartments and home gyms, we transform underutilized areas into functional, income-generating spaces. Our team ensures every Oceanside ADU meets local zoning and energy standards while maintaining the aesthetic flow of your home.
Why Oceanside Homeowners Choose Royalty Design Build
When it comes to home additions in Oceanside, Royalty Design Build stands out for its unmatched craftsmanship, transparent communication, and a design-build process that turns your vision into reality.
10 Years of Local Knowledge & Coastal Expertise
Our team understands Oceanside’s architecture, zoning laws, and coastal building requirements. We design each project to complement your neighborhood while maximizing function and value.
Design-Build Advantage
As a full-service design-build firm, we handle every phase, from 3D design concepts and permit management to construction and finishing touches, saving you time and reducing stress.
Premium Craftsmanship
We use high-quality materials and proven techniques to ensure every addition feels like it’s always been part of your home. Every detail, from foundation to finish, reflects our commitment to excellence.
Our Proven Process for Home Additions in Oceanside
Step 1 – Consultation & Planning
We start with an in-depth consultation to understand your vision, needs, and goals. Our experts evaluate your property layout and recommend design options that align with your lifestyle.
Step 2 – Custom Design & Visualization
Using AI-assisted design tools and 3D renderings, we bring your new home addition to life before construction begins. You’ll see every layout, material, and finish in vivid detail.
Step 3 – Permitting & Preparation
We handle all Oceanside city permits, engineering plans, and inspections, ensuring your home addition project complies with California building codes.
Step 4 – Construction & Quality Control
Our skilled builders execute the design with precision, safety, and care. We maintain open communication throughout the process to ensure a smooth experience.
Step 5 – Final Walkthrough & Completion
Before project delivery, we conduct a detailed walkthrough to ensure every finish, fixture, and feature meets your expectations. Your new addition will be move-in ready and built to last.
Step 6 – Post-Project Support & Maintenance
Even after completion, our relationship doesn’t end. We provide post-construction support, warranty guidance, and optional maintenance services to keep your new addition in peak condition. Our goal is lasting satisfaction, knowing your new space will serve you beautifully for years to come.
Nearby
More Services in This City
How it works
From the First Call to the Final Walkthrough
1
Tell us about the project
Call or send the form. We call you back to set a time for the visit.
2
Free in-home visit
We see the space, listen to what you want and talk through the options.
3
Design and plan
Layout, materials and permits, planned before any work starts.
4
Build and walkthrough
One team runs the job and walks it with you when it is done.
Questions
Frequently Asked Questions About Home Additions in Oceanside, CA
How much does a home addition cost in Oceanside, CA?
The cost of a home addition in Oceanside depends on the size, the design, the materials and the complexity of the build. Second-story additions and luxury master suites take a larger investment than a single room. At Royalty Design Build, we provide a detailed, transparent quote after your in-home consultation so you know exactly what to expect.
How long does a room or home addition take to complete?
Most room additions take 8 to 16 weeks from start to finish, while larger or multi-room additions can extend to 20 weeks depending on permits and custom design features. Our design-build process streamlines construction by combining design, planning, and building under one roof, saving you time and minimizing stress.
Do I need a building permit for a home addition in Oceanside?
Yes. Any structural home addition in Oceanside requires city permits and inspections to meet California’s building and safety codes. The good news is, Royalty Design Build handles the entire permitting process for you, including architectural plans, zoning approvals, and coastal development requirements if applicable.
What’s the difference between a home addition and a home remodel?
A home remodel updates your existing space (like a kitchen or bathroom), while a home addition adds new square footage, such as a bedroom, family room, or second floor. Royalty Design Build offers both, and we can help you decide which option best fits your goals, budget, and property layout.
Free in-home consultation
Ready to Start Your Room Additions Project?
Schedule your free consultation today and start your remodeling journey with Royalty Design and Build!
Send us your project
Takes a minute. We call you to set a time for the free visit.
Free, no obligation. Or call (858) 315-4249.