Home & Room Addition Construction in Largo, FL
At Coastal Haven Design + Build, we provide quality, custom home and room addition construction in Largo, FL for homeowners who need more space without leaving the home they love. Whether you're looking to add a private home office, expand your primary suite, build out a family room, or create a dedicated guest space, our team will bring your vision to life with skill, creativity, and structural integrity.
Room and home additions are one of the most cost-effective ways to increase square footage and long-term property value — and when done right, they should feel like a natural part of your existing home.
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St. Petersburg
Expand With Purpose. Build With Confidence.
Bedroom Additions & Guest Suites
Create a quiet, dedicated workspace tailored to your daily needs — with built-in shelving, natural light, and layout features designed for productivity.
Bedroom & Suite Expansions
Need more sleeping space or a luxurious retreat? We design primary suites, guest rooms, and children's bedrooms that are functional and beautifully finished.
In-Law Suites & Multi-Generational Living
Add privacy and independence for loved ones with fully equipped in-law suites featuring bathrooms, living areas, and private entrances.
Sunrooms & Bonus Spaces
Bring in light and enjoy indoor-outdoor living year-round with sunroom additions, flex rooms, or all-season entertaining spaces.
Second Story Additions
Looking to build up instead of out? Our team handles second-floor construction with expertise, ensuring your
home remains structurally sound and visually cohesive.
Garage Conversions & Detached Additions
We can transform underutilized garage space or build separate structures like pool houses or casitas to extend your property’s functionality.
Room Addition & Home Construction in Tampa Bay
Why Choose Coastal Haven Design + Build?
Your Vision, Our Expertise
Local Experience in Tampa Bay
We understand the architectural styles, permitting process, and climate considerations unique to Largo and the Tampa Bay area.
Custom Solutions, Not Cookie-Cutter Builds
We approach all home additions as a unique opportunity, crafting layouts and finishes that match your lifestyle and reflect your existing home.
Experienced Team of Experts
From design and planning to engineering and construction, we handle your entire project in-house — so there’s no confusion, no delays, and no finger-pointing.
Seamless Design Integration
Our home additions are built to feel like they were always part of the structure, with attention to rooflines, materials, and interior transitions.
Transform Your Space
Our Remodeling Process
Step 1: Site Visit & Consultation
We meet with you to assess your property, discuss ideas, and determine feasibility of your remodel. Whether you’re adding to the side, rear, or second floor of your home, we’ll walk you through your options.
Step 2: Design Development & Planning
Our team will develop a tailored plan, complete with floorplans, elevations, and material options. We also handle permitting, zoning checks, and HOA coordination if needed.
Step 3: Construction Begins
Once remodel plans are approved, we move into construction. From foundation work and framing to electrical, plumbing, and installation, your addition is built by skilled professionals who care about the details.
Step 4: Final Walkthrough & Completion
After the dust settles, we perform a detailed walkthrough with you to ensure everything meets expectations. We don’t consider the job done until you’re 100% satisfied.
Add More Room to Live, Work, and Thrive
If you're running out of space but love where you live, a home or room additions in Largo, FL might be the perfect solution. At Coastal Haven Design + Build, we help you expand with confidence — ensuring your new space feels natural, comfortable, and built to last.
Frequently Asked Questions
Got questions about home additions? We’ve got answers! Here are some of the most common inquiries we receive from homeowners looking to remodel their spaces.
What types of room additions do you build?
We build a wide range of additions including bedrooms, offices, dens, sunrooms, bonus rooms, and even full in-law suites with kitchens and bathrooms. Every addition is designed to fit the layout, style, and function of your current home.
How long does a room addition take?
Most room addition construction projects in Largo take 8 to 16 weeks depending on size, complexity, and weather conditions. Second-story additions or major structural changes may require more time. We provide a clear project timeline during the planning phase.
Do I need permits for a room addition?
Yes — room additions almost always require building permits, zoning approval, and in some cases, HOA approval. We handle the entire permitting process, including architectural drawings, city submissions, and inspections.
Can you match the existing exterior of my home?
Absolutely. One of our top priorities is ensuring your new addition blends seamlessly with your existing architecture. We match siding, roofing, trim, and windows so your addition doesn’t feel like an afterthought — it feels like it’s always been there.
Do you build second-story additions?
Yes — we design and construct second-story additions for homeowners looking to expand vertically. These projects require careful planning, but our structural and design team works together to ensure everything meets code, stays safe, and looks fantastic.
Can I live in my home during construction?
In most cases, yes. For additions that are built onto the back or side of your home, we can often section off the construction area. If the project involves major structural changes or affects essential rooms like your kitchen or bathroom, we’ll discuss temporary alternatives.
Do you offer other remodeling services?
Yes — we are a full-service design-build firm. In addition to room additions, we offer kitchen remodeling, bathroom remodeling, floor installation, lighting replacement, door installation, shelving installation, outlet installation, cook top upgrades, windows, and full home remodel and renovations throughout Tampa Bay and surrounding areas.
How do I get started on a home addition?
Start with a free consultation. We’ll assess your goals, budget, and timeline, then provide recommendations for the best path forward. With our custom services, strong client reviews, and transparent process, we’re confident you’ll love working with Coastal Haven. We’re proud to share our past projects and help you explore what’s possible.
More Areas We Serve
Build proudly serves the entire Tampa Bay area, bringing exceptional home remodeling services to Largo and the following areas: