Understanding SFR Zoning Regulations and Why United Architects Excels in Coral Gables Residential Design
- Maria Luisa Castellanos

- 1 day ago
- 5 min read

When planning a new home or remodeling an existing one in Coral Gables, understanding Single-Family Residential (SFR) zoning regulations is essential. These rules determine how much space you can build and which parts of your home count toward the maximum allowable area. Navigating these regulations can be complex, but working with a skilled architecture firm like United Architects ensures your project meets local codes while maximizing design potential.
You can see some of United Architects' Residential Design's here. Coral Gables residential designs must be fresh, interesting, sophisticated, and yet comfortable and functional for the family!
This post breaks down what is included and excluded in the gross floor area and how to calculate the maximum lot coverage under Coral Gables SFR zoning . It also explains why United Architects, with offices in Coral Gables, stands out as the ideal partner for residential architecture in this community.
What Coral Gables SFR Zoning Means for Homeowners
Coral Gables has specific zoning rules that control the size and layout of single-family homes. There are two calculations that are required: Maximum lot coverage (the footprint of the house) and maximum allowable area. These rules help maintain the neighborhood’s character and ensure balanced development. The maximum square foot floor area is the total floor space allowed for a residence.
The maximum lot coverage has two values: 35% for the main house and 45% including all accessory buildings and the swimming pool.
The maximum square foot floor area permitted for single-family residences shall be equal to forty-eight (48%) percent for the first five-thousand (5,000) square feet of building site area and thirty-five (35%) percent for the next five-thousand (5,000) square feet of building site area and thirty (30%) percent for the remainder of the building site area.
Areas Excluded from Maximum Floor Area in a Coral Gables Residential Design
Certain spaces do not count toward the gross floor area, allowing homeowners to add functional outdoor or semi-outdoor spaces without reducing the interior living area. These include:
One-story roofed terraces, breezeways, and porches
These must have an average floor-to-ceiling height of 13 feet or less. Homeowners must submit a covenant promising not to enclose these spaces if doing so would exceed the maximum floor area. You can understand why, if you look around Miami and see all the former porches or covered terraces that have been enclosed.
Screen enclosures
These are also excluded from the gross floor area calculation, giving flexibility for outdoor living spaces like screened patios.
Areas Included in Gross Floor Area
The following spaces count fully or partially toward the maximum allowable floor area:
All living spaces such as living rooms, bedrooms, kitchens, utility rooms, and mechanical equipment rooms, regardless of location within the building.
Elevator shafts and stairwells on each floor.
Penthouses, interior balconies, and mezzanines.
Auxiliary or accessory buildings on the property.
Screened porches count as half of their floor area, provided a covenant is submitted stating they will not be enclosed, if it causes the residence to exceed the limit.
Garages and storage areas.
Spaces where the floor-to-bottom of the roof support exceeds 15 feet without intermediate floors are counted twice in the floor area factor.
Why These Zoning Details Matter for Your Home Design
Understanding which spaces count toward your home’s size limit allows you to plan smarter. For example, you can design a large screened porch or breezeway that enhances outdoor living without reducing your interior space allowance. Knowing that garages and mechanical rooms count fully helps avoid surprises during permitting.
These zoning nuances also affect the home’s value and livability. A well-designed home that maximizes allowable space while incorporating outdoor areas can offer more comfort and appeal.
How United Architects, Coral Gables Residential Architects, Uses Zoning Knowledge to Benefit Coral Gables Homeowners
United Architects has deep experience working within Coral Gables zoning rules. Their expertise helps clients:
Maximize usable space by designing terraces, porches, and screen enclosures that comply with height and enclosure covenants.
Avoid costly mistakes by accurately calculating gross floor area and ensuring all included spaces meet code.
Create balanced designs that respect neighborhood character while meeting modern lifestyle needs.
Streamline permitting through thorough documentation, including necessary covenants for excluded or partially counted areas.
Specific Examples of United Architects’ Approach
Designing a terrace with a ceiling height under 13 feet and submitting the required covenant, allowing the client to enjoy an open-air connection between house sections without increasing gross floor area.
Planning a screened porch counted at half floor area, providing a comfortable outdoor space that enhances the home’s footprint without exceeding limits.
Incorporating mezzanines and interior balconies that add volume and style while fully accounting for their floor area in the design process.
What Homeowners Should Consider When Working with United Architects
Choosing the right architecture firm makes a big difference in navigating zoning rules and achieving a beautiful, functional home. United Architects offers:
Personalized design tailored to your lifestyle and Coral Gables zoning.
Clear communication about what zoning allows and how it impacts your project.
Creative solutions to maximize space and outdoor living.
Experienced project management to keep your build on track and compliant.
The following areas or structures shall not be computed into the gross floor area of the building except as stated herein:
Floor space in roofed terraces, breezeways, and porches provided, a covenant is
submitted stating that such roofed terrace, and breezeway or porch will not be enclosed if
it will cause the residence to exceed the maximum permitted floor area.
Floor space in screen enclosures.
Carports that consist of a roofed structure that is open on three sides and attached to the
main building for the purpose of providing shelter for one or more motor vehicles.
Final Thoughts on SFR Zoning and Residential Design in Coral Gables
Coral Gables SFR zoning rules shape how homes are built and expanded. Knowing what counts toward gross floor area and what does not helps homeowners make informed decisions. United Architects combines this knowledge with design skill to deliver homes that fit zoning requirements and exceed expectations.
If you want a home that balances zoning limits with style and comfort, United Architects is a trusted partner in Coral Gables residential architecture. Their expertise ensures your project is both beautiful and compliant, making the most of your property’s potential.
Contact Information
If you would like to discuss your new house project or your addition and/or renovation, call Maria Luisa Castellanos, R.A., the principal of the firm, on her cellphone at 305-439-7898 or email her at MLC@UnitedArchs.com . She would to talk to you about your project and answer any questions you may have.



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