Buyers fall for these buildings for the right reasons. The proportions, the terrazzo, the eyebrows over the windows, the way a MiMo façade handles the light. Then the renovation begins and they discover that a great deal of what they wanted to change is not theirs to decide.
Miami Beach protects its historic architecture more actively than almost any city in the United States, and the protection is broader than most buyers expect. It is not only about demolition, and it is not only about the street façade.
This is a design and planning guide for owners. It is not legal advice, and it does not replace the City's own review process.
What is actually protected
Miami Beach's historic districts include the Art Deco, MiMo and Spanish Mediterranean districts, along with individually designated properties across the city.
If your property sits inside a designated district, or is individually designated, work requires a Certificate of Appropriateness from the Historic Preservation Board.
The scope catches owners off guard. A Certificate of Appropriateness covers new construction, alterations, modifications and improvements. In practice, review commonly reaches:
- Windows and doors, including replacement with a different profile or material
- Railings and balustrades
- Glass block
- Exterior paint colours
- Signage
- Rooftop equipment, including air conditioning and pool equipment
- Anything affecting massing or the building's silhouette
- Public portions of building interiors, in the case of buildings within a historic district
That last point is the one that surprises people most. The Board's authority extends to determining whether buildings, structures and improvements, including public portions of interiors, may be altered. For a single-family house this is rarely the binding constraint. For a small hotel, a condominium lobby or any building with a public-facing interior, it very much is.
Two levels of review
Not every application goes to a public hearing.
Regular certificates can generally be approved at staff level. This is the faster route and covers work consistent with the district's design guidelines.
Special certificates require a public hearing before the Board. Expect this for anything involving demolition, significant alteration, changes to massing, or work that departs from the guidelines.
The design consequence is straightforward: a scheme that stays within the guidelines gets resolved in weeks at staff level. A scheme that fights the guidelines gets a hearing, a calendar, and an uncertain outcome. Knowing which route your project is on, before design begins, is worth more than any other single piece of information.
What you can almost always do
Here is the good news, and it is substantial. The interior of a private residence, away from protected public-facing elements, is largely yours.
- Kitchens, completely
- Bathrooms, completely
- All interior finishes, plaster, wall treatments and paint
- Custom millwork and joinery throughout
- Interior lighting design
- Non-structural partition changes
- Flooring, subject to any restriction on protected historic material such as original terrazzo
- Closets, dressing rooms and internal storage
- Mechanical and electrical upgrades that do not alter the exterior
A historically designated house can be brought entirely up to contemporary standards of comfort without touching a single protected element. The restriction is almost never on how you live inside. It is on what the building says to the street.
Where the constraints actually bite
Windows
The most contested element in every historic district renovation, and the one where two regulations collide.
Historic guidelines want the original profile, proportion and configuration preserved. Miami-Dade and Broward sit in the state's High Velocity Hurricane Zone, which requires impact-rated products carrying a Miami-Dade Notice of Acceptance.
Impact assemblies are thicker and heavier than what they replace. Frames are deeper, sightlines are wider, and the glass has a different optical character.
Resolving that conflict is a design problem, not a paperwork problem. It is solvable, and manufacturers now produce impact products specifically for historic applications, but the resolution has to happen at design stage. Specifying a standard impact window and hoping it passes review is the most expensive mistake available in this category.
Original material
Terrazzo, original tile, keystone, decorative plaster, ironwork and terrazzo thresholds are frequently the elements that make these houses worth owning.
The design position that works: restore and expose the original material, and make the new work clearly new. Attempting to imitate historic detail almost always reads as false, and reviewers can tell. Contrast is more respectful than imitation, and it photographs better.
Rooftop equipment
Air conditioning condensers, pool equipment and solar are all reviewable if visible. Screening and placement need to be resolved in the design rather than improvised on site.
Additions and massing
Anything that changes the silhouette from the street will go to a hearing. Additions are generally most successful when set back, subordinate in massing, and legible as a later addition rather than a pastiche of the original.
Art Deco and MiMo are not the same problem
They are treated as one category by buyers and as two by anyone who has designed in both.
Art Deco, roughly 1920s to 1940s
Streamlined horizontal massing, eyebrows over windows, glass block, terrazzo floors, curved corners, porthole windows, and a formal, symmetrical logic.
What works inside: the interiors were never as ornate as the façades. Contemporary interiors sit comfortably in Art Deco shells provided the geometry is respected. Curves answer curves. Horizontal banding in millwork echoes the exterior without imitating it. Terrazzo, where it survives, should be restored rather than covered.
What fails: heavy traditional detailing, and literal Deco pastiche. Applying stepped motifs and sunburst detail to new millwork produces a themed interior rather than a designed one.
MiMo, roughly 1945 to 1970s
Miami Modern. Delicate concrete structure, brise-soleil screens, cantilevered planes, breeze blocks, large glazed openings, and a much more relaxed relationship between inside and outside.
What works inside: MiMo interiors want openness, a clear structural logic and continuity to the exterior. Mid-century furniture is the obvious move and often the correct one. Warm woods, terrazzo, and lighting that reads as architecture rather than decoration.
What fails: closing down the plan. MiMo houses are about light and connection to outside. Subdividing them into small rooms defeats the reason the house is protected in the first place.
The sequence that avoids a hearing
1. Confirm the designation. Is the property individually designated, inside a district, or neither. This single fact changes everything downstream.
2. Read the design guidelines for your specific district. The City publishes general guidelines and supplements for particular districts. They are specific, and they are the criteria your application will be judged against.
3. Identify protected elements before design. Façade, windows, original material, massing. Everything else is likely available.
4. Establish the window strategy early. Historic profile versus impact requirement is the hardest problem in the project. Resolve it first, because it affects the reveal, the sightline and the light in every room.
5. Talk to preservation staff before submitting. A pre-application conversation frequently converts a hearing into a staff approval. It is the highest-value free consultation available in this process.
6. Then design. With the protected elements known and the window strategy settled, the interior can be developed freely, which is where the real quality of the house is decided anyway.
The short version
Miami Beach protects the outside of these buildings, along with the public portions of some interiors. It does not, for a private residence, dictate how you live inside.
The projects that go well identify the protected elements first, resolve the window question before anything else, and put the design energy into the interior, where there is almost complete freedom and where the quality of the house is actually decided.
Renovating a historic property in Miami Beach?
Tell us the address and what you have in mind. We will tell you which parts of the project are likely to be reviewed, which are yours outright, and how the window question is best resolved for your building.
This article is design and planning guidance, not legal advice, and it does not replace the City of Miami Beach review process. Designation status and requirements vary by property. Confirm your specific obligations with the City's Planning Department and Historic Preservation staff.
Jorge Castillo Design designs high-end residential interiors across South Florida, including Miami Beach, Miami and Fort Lauderdale.