Duval County · Northeast Florida
Home Additions in San Marco
Room additions, second stories and in-law suites that tie into the original structure like they were always there. Licensed and insured, Florida Certified Building Contractor CBC1265492.
- Matched roof, wall and floor planes
- Tie-inMatched roof, wall and floor planes
- We work around occupied houses
- Live-inWe work around occupied houses
- Change orders before, not after
- WrittenChange orders before, not after
Home Additions for San Marco property owners
Good home addition work in San Marco begins with an afternoon on the property. San Marco Square and the Southbank Riverwalk both sit inside the area we cover in San Marco. The properties we work on in San Marco are mainly 1920s brick and stucco homes, riverfront property and small commercial buildings.
Low-lying ground behind the river bulkhead where tidal flooding on Hendricks and the surrounding streets is a known, recurring condition. The river is close and high — finished-floor elevation and backflow protection are live design issues, not paperwork. Those two facts explain most of the difference between a San Marco estimate and one from an hour inland.
Why home additions works differently in San Marco
Adding onto a San Marco house means working with construction that predates most current assumptions. Compact 1920s masonry houses on small lots, where additions have to go up or back rather than sideways — balloon framing, pier foundations and undersized electrical services are all common, and each one changes what an addition costs. Low-lying ground behind the river bulkhead where tidal flooding on Hendricks and the surrounding streets is a known, recurring condition. That adds buried surprises. City floodplain rules that trigger substantial-improvement review once a renovation passes a value threshold, so the exterior of the addition may be subject to review before the permit is worth applying for.
Something else that decides the scope here: the river is close and high — finished-floor elevation and backflow protection are live design issues, not paperwork. It changes what we expect to find once we start, and therefore what we're willing to quote before we do.
The issuing office is City of Jacksonville Building Inspection Division. That gets checked on the first visit, not after plans are paid for.
Put together, that's why we won't quote home addition work in San Marco from a phone call. The variables that decide the number are all on the property.
What home additions in San Marco covers
- Structural assessment of the existing house
- Roof and elevation resolution
- Foundation and floor system
- Systems capacity and upgrade
- Envelope and exterior matching
- Interior finish and transition
Signs it's time to call
These are the things owners tell us on the first call. If more than one sounds familiar, it's worth a look.
- A family member is moving in and the house has one bathroom too few.
- You've had an addition quoted before and the number seemed high for the square footage — usually that's the tie-in and systems work being priced honestly.
How we deliver home additions in San Marco
01
Walkthrough and measure
02
Design and structural plan
03
Permitting and review
04
Demolition and structural work
05
Systems, envelope and finish
06
Transition detailing and punch
What actually drives the cost
We won't quote a number sight unseen. These are the factors that move it, so you can see where your project is likely to land before we ever walk the property.
- Systems capacity
- A 100-amp panel and a right-sized HVAC unit for the original house frequently cannot serve the expanded one. That upgrade is part of the real cost.
- Setbacks and lot coverage
- If the only place the addition fits requires a variance, the timeline and the design both change. We check this on the first visit.
Working in San Marco.
We add on to older San Marco homes — rear additions, primary suites and kitchen expansions on houses that deserve the care. 1920s brick and stucco homes, riverfront property and small commercial buildings surround the work. Matching a hundred-year-old exterior convincingly is a sourcing problem as much as a carpentry one, and we plan for it.
San Marco is one stop in a Duval County circuit that also takes in Jacksonville, Riverside, Avondale and Ortega.
- 1920s brick and stucco homes
- riverfront property
- small commercial buildings
Other work we do in San Marco
Whole-Home Remodeling in San Marco
Full-house renovations that fix the structure and systems, not just the surfaces.
Learn more →Custom Home Building in San Marco
Ground-up custom homes, from land clearing through the final walkthrough, with one builder accountable the whole way.
Learn more →Kitchen Remodeling in San Marco
Full kitchen renovations — layout, structure, systems and cabinetry — handled by the same crew start to finish.
Learn more →Home Additions near San Marco
All areas we serve for home additions →Home Additions questions in San Marco
Will my San Marco addition need historic review?
If your property is inside a designated district, yes — city floodplain rules that trigger substantial-improvement review once a renovation passes a value threshold. That review governs materials, window profile and massing, and it happens before permitting. We check the designation on the first visit so it's never a surprise.
What should I budget for home addition work in San Marco?
It depends on the site more than on the square footage. Low-lying ground behind the river bulkhead where tidal flooding on Hendricks and the surrounding streets is a known, recurring condition, and the river is close and high — finished-floor elevation and backflow protection are live design issues, not paperwork, both of which move the number materially in San Marco. We quote after a walkthrough, free of charge.
What's the permitting process for home addition work in San Marco?
Yes for anything structural or involving systems. Permits come from City of Jacksonville Building Inspection Division, and there's a local wrinkle worth knowing: city floodplain rules that trigger substantial-improvement review once a renovation passes a value threshold. We handle the whole submittal.
When could you get out to look at a San Marco property?
Quickly for the walkthrough — San Marco is close enough to Keystone Heights that scheduling isn't the constraint. Permitting is, and we'll be straight with you about how long City of Jacksonville Building Inspection Division actually takes.
Do you actually travel to San Marco?
Yes, regularly. We're based in Keystone Heights and Duval County is core territory for us; Jacksonville, Riverside and Avondale are all on the same routes. (352) 478-6112 gets you a site visit.
Can we live in the house during the addition?
Usually yes. We build the new structure as far as possible before opening the existing wall, and we seal and dust-barrier the connection. Kitchen and single-bathroom projects are the exceptions worth planning around.
How long does an addition take?
Most run three to six months of construction, with design and permitting in front of that. Second stories and additions requiring variances run longer.
Ready to talk about home additions in San Marco?
Free consultations, straight answers, and one contractor accountable from the first walkthrough to the last punch item.