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Historic Home Renovation
Renovating a designated historic home in South Florida means answering to two review processes before construction can start — the standard building permit and a separate historic design review, whether that’s a Certificate of Appropriateness from a local Historic Preservation Board or, in Coral Gables, review by the city’s Board of Architects for anything touching the exterior. Coconut Grove, Coral Gables, and several individually designated Miami neighborhoods carry this layer; so do historic districts and landmarks across Broward and Palm Beach.
This isn’t paperwork for its own sake. These boards exist to keep a defined architectural character intact — Mediterranean Revival stucco and barrel tile in Coral Gables, Coconut Grove’s mix of vernacular and Bahamian-influenced structures, Art Deco and Mediterranean Revival districts elsewhere in Miami-Dade — and they have real authority to require design changes or deny work outright.
We build the historic review process into the schedule from the first meeting rather than treating it as a delay to work around, and we know which changes need full board review versus staff-level sign-off, which saves real time on a project type where timeline is often the biggest source of homeowner frustration.
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Certificate of Appropriateness: what it actually covers.
For a designated landmark or a contributing property inside a historic district, a Certificate of Appropriateness (COA) is required before the city will issue a building permit for most exterior work — additions, window and door changes, roof replacement, new construction, and any demolition, partial or total. Not everything needs a full board hearing, though: repairs, in-kind window or storefront replacement, exterior paint, and minor life-safety or accessibility work can often be approved directly by preservation staff if the scope meets the district’s design criteria. Interior work generally isn’t subject to COA review at all unless it affects a character-defining exterior feature.
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Coral Gables' Board of Architects and the Mediterranean standard.
Coral Gables runs one of the strictest design review processes in the state — the Board of Architects has to approve almost any exterior change to a residential property: new construction, additions, exterior renovations, paint color, window replacement, roofing, fences and gates, driveway pavers, accessory structures, even mailbox placement. For properties using the city’s Mediterranean architectural style (applicable in specific multifamily and mixed-use zoning districts, and commonly referenced as the design standard for single-family renovation as well), approved exterior materials are limited to stucco, coral rock, brick, barrel tile roofing, wood shutters, and ornamental wrought iron. Reviews run 3-8 weeks per submittal cycle, and major projects commonly go through two to four cycles between conceptual and final approval — that alone can add two to six months to a project timeline that a non-historic renovation wouldn’t carry.
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Working with original fabric.
Historic tri-county homes were often built with materials that simply aren’t manufactured the same way anymore — Dade County pine framing (naturally termite- and rot-resistant, no longer commercially harvested), poured or precast terrazzo flooring, oolitic coral rock or keystone masonry, and original steel casement windows. Preservation-minded renovation means deciding, room by room and feature by feature, what gets repaired and retained versus what’s beyond saving and needs in-kind replacement — a decision that review boards weigh in on for anything visible from the street, and one that requires trades who actually know how to work with these materials rather than treat them as demolition.
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The tax incentive most homeowners don't know about.
Florida’s historic preservation ad valorem tax exemption program allows owners of qualifying designated historic properties to freeze the property’s taxable value at its pre-improvement assessment for up to 10 years after a substantial, qualifying restoration or rehabilitation — meaning the increased value from your renovation isn’t taxed for a decade. It’s administered locally (through the county or city historic preservation office) and has specific qualifying-expense and review requirements, but for owners already navigating COA review, it’s worth building into the project’s financial plan from the start.
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Materials
Option 1
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In-kind repair and material matching prioritized over wholesale replacement wherever the original fabric is salvageable
Option 2
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Historically appropriate impact-rated windows matching original profiles and configurations
Option 3
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Coral rock, oolite, and stucco repair using compatible (not modern cementitious-only) methods
Option 4
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Terrazzo floor restoration rather than replacement where the original slab is sound
Option 5
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Concealed, code-current electrical, plumbing, and HVAC upgrades routed to avoid disturbing character-defining features
Option 6
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Salvage and reuse of original millwork, hardware, and trim details where condition allows
Not sure which option fits your home? We’ll walk the trade-offs on-site. Call 754-236-0675 | Get A Free Estimate
What Drives The Cost
- Number and complexity of design review cycles — each additional Board of Architects or Historic Preservation Board cycle adds both time and design/consulting cost
- Extent of specialty material work — in-kind coral rock, terrazzo, and historic window restoration cost more than standard modern equivalents
- Condition of original fabric — the unknowns behind historic walls (structural, moisture, pest damage) are a bigger cost variable here than on non-historic renovations
- Dual permitting requirements — running COA and building permit processes in parallel adds administrative and design cost
- Sourcing of matched materials — custom-fabricated barrel tile, wrought iron, or millwork to match existing profiles carries a real premium over stock materials
- Structural work concealed behind preserved facades — reinforcing or upgrading systems without disturbing protected exterior features is more labor-intensive than open renovation
Get a real, itemized estimate — no surprise change orders. Call 754-236-0675 | Get A Free Estimate
Our Process
Historic Research & Conditions Documentation
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COA / Board of Architects Pre-Application
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Dual Permitting
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Specialty Restoration & Hidden Systems Upgrades
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Final Inspections & Preservation Closeout
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Document the property’s designation status, character-defining features, and existing condition before any design work begins.
Develop design concepts and submit for conceptual or preliminary historic design review ahead of formal permit submission.
Secure the Certificate of Appropriateness (or Board of Architects final approval) and the standard building permit in coordinated sequence.
Repair or in-kind replace historic materials while updating electrical, plumbing, and HVAC systems concealed within the original structure.
Pass final building inspection, close out the COA, and file for the historic tax exemption where the property qualifies.
One point of contact, start to finish — us. Call 754-236-0675 | Get A Free Estimate
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Historic Home Renovation Questions, Answered
1 My house is in a historic district — can I even renovate it?
Yes. Historic designation doesn't freeze a property; it adds a design review layer for exterior work to make sure changes stay compatible with the district's character. Interior renovation is generally far less restricted than most homeowners assume.
2 What's a Certificate of Appropriateness and do I need one?
It's an approval, separate from your building permit, required before the city will issue a permit for most exterior work on a designated landmark or contributing historic property — additions, window/door changes, roof replacement, and new construction. Minor repairs and in-kind replacements can often be approved at the staff level without a full board hearing.
3 Can I replace my historic home's windows with modern impact windows?
Usually yes, but the replacement typically needs to match the historic profile, material appearance, and configuration of the originals closely enough to satisfy the review board — true divided-lite or historically accurate impact-rated windows exist specifically for this situation.
4 What is the Coral Gables Board of Architects and why does it review my renovation?
It's the city's design review body, and in Coral Gables it approves nearly any exterior change to a residential property — not just additions, but paint color, roofing, fences, and driveways. It exists to enforce the city's Mediterranean architectural character standards.
5 Is it true I can freeze my property taxes for renovating a historic home?
Florida's historic preservation ad valorem tax exemption can freeze your taxable value at the pre-renovation assessment for up to 10 years for a qualifying restoration on a designated historic property, administered through your local historic preservation office.
6 How much longer does permitting take for a historic property?
Expect real added time — Board of Architects or Historic Preservation Board review cycles typically run 3-8 weeks each, and larger projects often go through two to four cycles, adding roughly two to six months beyond standard permitting timelines.
7 Can I add square footage to a historic home?
Often yes, but the addition has to be designed to be compatible with (and typically visually subordinate to) the historic structure, and it goes through the same design review process as any other exterior change.
8 What happens if I do exterior work on a historic home without approval?
You're exposed to stop-work orders, fines, and potentially being required to remove or reverse the unapproved work — plus it can create real problems if you later try to sell or need to pull a permit for anything else on the property.
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