Planning to build or remodel in Los Angeles? Understanding how much of your property you can actually develop is the first step to a successful project.
The Zoning Check & Buildable Area Calculator by JDJ Consulting helps you instantly estimate your property’s buildable square footage, zoning limitations, and maximum potential units—without diving into complex code tables.
This tool gives you a realistic preview before you commit time and money to designs or permits.
Zoning Check & Buildable Area Calculator
Enter your lot details to estimate buildable square footage and zoning capacity for Los Angeles properties.
Or call us at (818) 793-5058
*Disclaimer: This tool provides general estimates only and is not an official zoning determination.
1. What the Calculator Does
The calculator analyzes your lot size, zoning type, and city regulations to estimate how much space you can build. It uses standard metrics such as FAR (Floor Area Ratio), setbacks, lot coverage, and story limits to show your potential development envelope.
Whether you’re exploring a new residential project or checking if an addition is feasible, this estimate helps you make early planning decisions confidently.
2. Understanding the Main Inputs
Lot Area: Total land size in square feet or square meters.
FAR (Floor Area Ratio): Determines how much total floor space you can build. For instance, an FAR of 0.75 on a 5,000 sq. ft. lot allows about 3,750 sq. ft. of buildable space.
Lot Coverage: The maximum percentage of your lot that can be covered by a structure at ground level.
Setbacks: Required distances from property lines on the front, rear, and sides. These help define the actual “buildable box” on your lot.
3. How Setbacks, Coverage & Stories Work Together
Once you enter your data, the calculator applies coverage limits and setbacks to find your estimated buildable footprint.
You can also input maximum stories and height limits to calculate your total Gross Floor Area (GFA) — the combined floor area of all stories. This helps you visualize the vertical capacity of your design and understand the total usable building space allowed by zoning rules.
4. Advanced Options for More Accuracy
The calculator also includes real-world considerations like lot slope, average unit size, and ADU (Accessory Dwelling Unit) options. Steep or sloped lots reduce buildable area automatically, while the ADU feature estimates additional square footage if you’re planning a secondary unit. These features make the tool useful for both homeowners and developers.
Typical Zoning Limits – Los Angeles
Reference guide for FAR, height, and coverage by residential zone. Actual limits may vary by area and overlay.
| Zone | Typical FAR | Max Height | Lot Coverage | Typical Units Allowed |
|---|---|---|---|---|
| R1 | 0.45 – 0.50 | 28–33 ft | 45–50% | 1 |
| R2 | 0.45 – 0.60 | 33 ft | 50% | 2 |
| RD1.5 | 1.0 – 1.2 | 45 ft | 55% | 1 unit per 1,500 sq. ft. |
| R3 | 1.5 | 45–50 ft | 60% | 1 unit per 800 sq. ft. |
| R4 | 3.0 | 75 ft | 65% | 1 unit per 400 sq. ft. |
*Always confirm zoning data with Los Angeles City Planning or a professional consultant before design or permit submission.
5. Important Notes & Disclaimer
This calculator provides a professional estimate—not an official zoning determination. Real buildable area may vary depending on overlays, easements, hillside ordinances, and other municipal conditions. Use it as a planning guide to understand your site’s potential before starting detailed design or permit work.
Conclusion
Knowing your property’s zoning potential helps you plan smarter, budget realistically, and avoid costly design revisions. If you’re serious about developing your property, get a verified zoning analysis and feasibility report from the experts at JDJ Consulting Group.
Book a Consultation today or call (818) 793-5058 to discuss your project with our planning specialists.
