St. Johns County · Northeast Florida
Home Additions in St. Augustine
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 St. Augustine property owners
We take on home addition work throughout St. Augustine, St. Johns County. The Castillo de San Marcos and St. George Street both sit inside the area we cover in St. Augustine. The properties we work on in St. Augustine are mainly historic-district homes, bayfront property and small commercial and hospitality buildings.
Two site conditions drive most of what home addition work costs here. Coquina, shell and centuries of fill — archaeological review can be triggered by excavation before a footing is ever poured. And Matanzas Bay tidal flooding reaches downtown streets on king tides, which sets the floor elevation conversation for any renovation.
What St. Augustine geology and review rules change
Additions around St. Augustine sit between two sets of rules. The Historic Architectural Review Board reviews exterior materials, windows, roofing and massing — approval comes before permitting, not after, which governs how an addition can look from the street, while Matanzas Bay tidal flooding reaches downtown streets on king tides, which sets the floor elevation conversation for any renovation, which governs how its stormwater and any wastewater expansion is handled. Coquina, shell and centuries of fill — archaeological review can be triggered by excavation before a footing is ever poured. That makes new foundation work a geotechnical question rather than a routine one. Getting all three lined up before design is the difference between a smooth permit and a resubmittal.
There's a second thing worth knowing about building in St. Augustine: some of the oldest building stock in the country alongside 1920s frame houses, all of it visually regulated. So what fits St. Augustine is not automatically what fits the next community over.
The issuing office is City of St. Augustine, with Historic Architectural Review Board approval. We confirm exactly what applies to your parcel before design, rather than discovering it at review.
That's the whole reason we walk St. Augustine properties before quoting: the conditions above change the scope, and a number that ignores them isn't a number.
What home additions in St. Augustine 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.
- 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.
- The previous owner already added on, badly, and it leaks or sags at the joint.
How we deliver home additions in St. Augustine
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.
- 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.
- Matching existing materials
- Brick, siding profile and roof tile that are out of production drive either a sourcing hunt or a design decision to break the plane deliberately.
Working in St. Augustine.
We add on to homes in and around St. Augustine — rear and side additions on historic houses, plus expansions on newer property nearby. Historic-district homes, bayfront property and small commercial and hospitality buildings form the context. Where a house has genuine architectural character, an addition should defer to it rather than compete.
St. Augustine sits in St. Johns County, and we cover the surrounding communities on the same trips — Vilano Beach, St. Augustine Beach, Elkton and World Golf Village are all inside our regular working radius from Keystone Heights.
- historic-district homes
- bayfront property
- small commercial and hospitality buildings
Other work we do in St. Augustine
Whole-Home Remodeling in St. Augustine
Full-house renovations that fix the structure and systems, not just the surfaces.
Learn more →Custom Home Building in St. Augustine
Ground-up custom homes, from land clearing through the final walkthrough, with one builder accountable the whole way.
Learn more →Kitchen Remodeling in St. Augustine
Full kitchen renovations — layout, structure, systems and cabinetry — handled by the same crew start to finish.
Learn more →Home Additions near St. Augustine
All areas we serve for home additions →Home Additions questions in St. Augustine
What will the review board allow me to add in St. Augustine?
Generally additions that are subordinate to the original house and set back from the primary facade, using compatible materials. The Historic Architectural Review Board reviews exterior materials, windows, roofing and massing — approval comes before permitting, not after. We've found it far cheaper to design toward those expectations from the start than to redesign after a review comment.
Why won't you quote home addition work in St. Augustine without seeing the property?
It depends on the site more than on the square footage. Coquina, shell and centuries of fill — archaeological review can be triggered by excavation before a footing is ever poured, and Matanzas Bay tidal flooding reaches downtown streets on king tides, which sets the floor elevation conversation for any renovation, both of which move the number materially in St. Augustine. We quote after a walkthrough, free of charge.
Do I need a permit for home addition work in St. Augustine?
In most cases yes, and it goes through City of St. Augustine, with Historic Architectural Review Board approval. The Historic Architectural Review Board reviews exterior materials, windows, roofing and massing — approval comes before permitting, not after. We pull the permits and handle the agency coordination as part of the job — you shouldn't be the one working out which office reviews what.
How soon can you start a project in St. Augustine?
We can usually get out to a St. Augustine property within a week for a walkthrough. Actual start dates depend on permitting through City of St. Augustine, with Historic Architectural Review Board approval more than on our calendar — we'll give you a realistic timeline for your jurisdiction rather than an optimistic one.
Do you actually travel to St. Augustine?
Yes, regularly. We're based in Keystone Heights and St. Johns County is core territory for us; Vilano Beach, St. Augustine Beach and Elkton are all on the same routes. (352) 478-6112 gets you a site visit.
Will the addition match the existing house?
As closely as available materials allow. Where an exact match no longer exists, we'll show you the options and recommend either the nearest match or a deliberate, designed break.
Do I need an engineer?
For a second story or any addition that alters the load path, yes. For a simple single-story bump-out on its own foundation, often not. We'll tell you which one you have.
Ready to talk about home additions in St. Augustine?
Free consultations, straight answers, and one contractor accountable from the first walkthrough to the last punch item.