Home Additions in Fleming Island, FL
Adding square footage in Fleming Island is rarely just a framing job — it's an HOA review, a Clay County permit, a Manual J HVAC re-sizing, and a roof tie-in to a 1990s subdivision truss profile that wasn't designed to be added onto. Mark handles all of that on one design-build contract. CGC1511598, in-house permitting, Renaissance Patio division for sunroom-style additions if that's the right fit.
Built to Fleming Island standards.
Fleming Island is where Mark Tivey has built his life and his business. With one of the highest veteran populations in Northeast Florida (17.5% — over 2x the state rate per Census Reporter) and a median household income near $116,000, the community demands quality work from contractors it can verify and trust. Mark delivers both — Florida-licensed CGC1511598 + RP252555575, U.S. Navy and Army Reserve veteran, and a 37+ year résumé that includes Mayo Clinic Jacksonville and Baptist Medical Center.
I help Jacksonville homeowners gain the space they need without the hassle and expense of moving. Whether your family has outgrown your current home, you need dedicated space for work or hobbies, or you're planning for multi-generational living, a well-designed home addition provides the square footage you need while increasing your property value. I handle every aspect of your addition project from initial design and permits through foundation, framing, roofing, and interior finishing. I specialize in creating additions that seamlessly blend with your home's existing architecture, making it look like the extra space was always part of the original design. With careful attention to structural integrity, energy efficiency, and quality craftsmanship, I deliver additions that enhance your lifestyle and serve your family for decades to come.
Home Additions options for Fleming Island homeowners.
- Room AdditionsAdd valuable living space to your Jacksonville home with a custom room addition tailored to your family's needs. I build single-room additions for bedrooms, home offices, playrooms, craft rooms, sunrooms, or any dedicated space you envision.
- Second Story AdditionsMaximize your property's footprint by building up instead of out with a second story addition. This option is ideal for homes on smaller lots where yard space is limited or for homeowners who want to preserve their landscaping and outdoor areas.
- Master Suite AdditionsCreate your personal retreat with a luxurious master suite addition that includes a spacious bedroom, walk-in closet, and spa-like bathroom. A master suite addition separates parents from children's bedrooms for better sleep and privacy.
- In-Law Suites & ADUsAccommodate aging parents, adult children, or guests with dignity and independence by adding an in-law suite or accessory dwelling unit (ADU). I build self-contained living spaces with a bedroom, bathroom, kitchenette or full kitchen, and living area that allow family members their own private space while keeping them close. I design these additions with accessibility features like zero-threshold entries, wider doorways, grab bars in bathrooms, and single-floor layouts that support aging in place. My in-law suites can be attached to the main house with a connecting door or built as detached structures, depending on your property and preferences. These versatile additions also work beautifully as home offices with client meeting space, rental units for extra income, or guest quarters for extended visits.
- Sunroom & Florida Room AdditionsTake advantage of Jacksonville's beautiful weather and sunshine with a sunroom or Florida room addition. I build bright, airy spaces with abundant windows that bring the outdoors in while protecting you from heat, insects, and storms. I offer various options from three-season rooms with large windows to fully climate-controlled four-season rooms with insulated glass, proper HVAC integration, and finishes matching your main home. Sunrooms provide versatile space for morning coffee, indoor plants, reading nooks, casual dining, or entertaining while enjoying natural light and garden views. I ensure proper foundation and roof integration, select energy-efficient windows appropriate for Florida's sun exposure, and create spaces that enhance your home's value while expanding your usable living area year-round.
- Garage Conversions & ExpansionsTransform underutilized garage space into valuable living areas or expand your garage to accommodate more vehicles, workshop space, or storage. I convert existing garages into bedrooms, home offices, gyms, playrooms, or studios by adding proper insulation, climate control, finished walls and ceilings, flooring, electrical, and windows for natural light. I handle the garage door removal and wall framing to create an attractive exterior that matches your home. Alternatively, I build garage expansions or additions for homeowners who need the parking and storage space of a two or three-car garage. My garage projects include proper foundation and drainage, quality doors and openers, adequate lighting and electrical for tools or equipment, and durable finishes that withstand automotive use.
The local-knowledge details I won't skip.
Roof tie-in match. Most 1990s Fleming Island subdivisions used specific shingle weights and truss spacings; matching the existing roofline cleanly sometimes means a partial re-roof of the original structure. Mark calls that on the Day-1 walkthrough, not at trim-out.
Foundation elevation match. The new addition's slab has to match existing finish-floor within 1/4 inch for door swings and flooring transitions. Concrete shrinkage and slab humidity in Fleming Island make this less automatic than it sounds.
HOA architectural review. Most Fleming Island subdivisions have an ARB on top of Clay County permitting — Eagle Harbor, Pace Island, Two Bridges, Margaret's Walk all do. Submitting to both in parallel saves 3–4 weeks.
HVAC Manual J recalc. Florida code requires a Manual J calculation when conditioned space increases significantly. A lot of additions get permitted with the existing HVAC and the homeowner finds out two summers later that the system can't keep up.
Side-yard setback verification. Fleming Island lot widths vary subdivision-to-subdivision; an addition that works on a 90-foot lot fails the setback on a 75-foot one. Mark pulls the plat before drawing the addition footprint.
Permits pulled in-house, every job.
Clay County permits are pulled through Tyler Technologies EPL. Permit fee is $1 per $1,000 of construction cost plus a $50 application fee. Jobs over $5,000 require a recorded Notice of Commencement before the first inspection — Tivey handles the filing.
The questions Fleming Island homeowners ask first.
Do I need to move out during a home addition?
Most homeowners remain in their homes during addition projects, though you'll experience some disruption. I work to minimize impact on your daily life by containing dust and debris, maintaining clear pathways, and securing the construction site each evening. The noisiest work—demolition, framing, roofing—happens during specific phases, and I communicate schedules so you know what to expect. If the addition connects to existing living areas, there may be a period where I create a temporary opening or barrier between spaces. I typically maintain your home's weather-tight envelope, so your existing rooms remain comfortable.
Will my addition match my existing home?
Yes—creating seamless integration is one of my priorities. I carefully match your existing home's exterior materials including siding, brick, stone, trim details, and roof shingles. I analyze your home's architectural style and replicate design elements like window styles, roof pitch, eave details, and proportions so the addition looks original to your home. Inside, I match flooring, trim profiles, door styles, and ceiling heights to create continuity between existing and new spaces.
What permits and approvals do I need for a home addition?
Home additions require building permits from the City of Jacksonville or your local municipality, which ensures work meets structural, electrical, plumbing, and energy codes. You'll need approved architectural plans and engineering drawings showing the addition's foundation, framing, and integration with your existing home. Depending on your neighborhood, you may also need HOA approval before beginning work. For properties in flood zones (common in Jacksonville), additional drainage and elevation requirements may apply. I handle all permit applications, submit required documentation, schedule inspections throughout construction, and obtain final certificates of occupancy.
Home Additions across Northeast Florida.
See your range in 90 seconds.
Tell me about your home additions project — you'll see a real budget range mid-flow, and I'll call within 24 hours with a specific quote for Fleming Island and the Clay County permit nuances.