What ADU can you build in your Casselberry backyard?
Instant zoning report — see exactly what your zoning allows: permitted ADU types, size limits, setbacks, and lot requirements for your specific property.
The quick answer
Casselberry ADU rules at a glance
- Owner-occupancy
Not required — you can rent both units - Short-term rentals
Restricted — long-term rentals only in most zones - Where it's allowed
Eligibility varies by zoning district — check your address to confirm yours
ADU Rules in Casselberry, Florida
We've researched Casselberry's ADU rules so you don't have to. Here's what matters most — the facts that determine whether your project is possible, and how much it will cost.
- Casselberry's LDR has no accessory dwelling unit use (§2-5.3)
- Only non-habitable accessory structures are allowed (≤500 sq ft by right, §2-7.9)
- No rentable backyard ADU is permitted
Last verified: 2026-07-15
Backyard ADUs like this are being built across Casselberry — here's how to do it right.
What Casselberry's zoning may allow for an ADU
Casselberry's land development code has no accessory dwelling unit use — its permitted-use table lists no ADU, guest house or accessory apartment. Only non-habitable accessory structures (sheds, garages ≤500 sq ft by right) are allowed, so there is no rentable backyard ADU.
Zoning allowance
Casselberry's Unified LDR permitted-use table (§2-5.3) has no accessory dwelling / guest house / accessory apartment line item, and a full-text scan of the development chapter returns none. Only 'accessory structures (residential)' — non-habitable buildings — are permitted (§2-7.9).
Size limits
Casselberry sizes only non-habitable accessory structures: ≤500 sq ft by right; over 500 sq ft requires conditional-use approval (§2-7.9). There is no ADU size because there is no ADU use.
Lot + setbacks
Setback requirements vary by zoning district in Casselberry. Confirm exact setbacks with Seminole County planning.
Height + coverage
Height and lot coverage limits vary by zoning district. Check Casselberry zoning code.
Parking
Parking requirements for ADUs in Casselberry vary by zoning district. Verify with local planning.
Rental / occupancy
No rentable accessory dwelling exists in Casselberry — accessory structures under §2-7.9 are non-habitable and cannot be rented as living units.
Permit process
ADU permits in Casselberry follow standard Florida residential building permit workflow. Contact Seminole County building department for current requirements.
Building limits and rental rules, side by side
These figures are based on the best available data for Casselberry and should be confirmed with the city's planning department before you commit to a design or a rental strategy — local ordinances change and vary by parcel.
Building Limits
- Max Size:See requirements above
- Detached Allowed?Check with city
Rental Rules
Short-Term Rentals Prohibited: Minimum 30-day stay required in Casselberry.
Here's exactly what you'll pay — and how to avoid the fees that catch most homeowners off guard
Most homeowners spend 3–4 weeks piecing this together on their own. We've mapped the full Casselberry permit process step by step — so you know exactly what's coming, and what to prepare.
Step 1: Pre-Application Zoning Check
- Where:
- Casselberry Planning Department
- What to bring:
- Property address and parcel ID, preliminary site sketch, lot survey
- Timeline:
- No appointment fee — call ahead to confirm office hours
- Cost:
- No fee for initial inquiry
Step 2: Submit Permit Application
- Where:
- Casselberry Planning Department — contact for portal link
- What to bring:
- Architectural plans, site plan, boundary survey, energy compliance docs
- Timeline:
- Contact planning to confirm current review timelines
- Cost:
- Contact planning for current fee schedule
Step 3: Plan Review & Revisions
- Where:
- Casselberry Planning Department
- What to bring:
- Responses to any correction letters; revised drawings if required
- Timeline:
- Plan for one or more review cycles — timeline varies by submission completeness
- Cost:
- No additional fee for standard resubmittal
Step 4: Construction & Inspections
- Where:
- Casselberry Building Department
- What to bring:
- Approved permit set must be on-site at all times during construction
- Timeline:
- Schedule inspections as each phase of work is completed
- Cost:
- Included in permit fee
Casselberry neighborhoods where ADU permits are being filed — is your street next?
Casselberry ADU — Frequently Asked Questions
These are the questions we hear most often from Casselberry homeowners. If yours isn't here, our ADU Zoning Experts can answer it directly.
Can I build an ADU in Casselberry, Florida?
Casselberry's Unified LDR permitted-use table (§2-5.3) has no accessory dwelling / guest house / accessory apartment line item, and a full-text scan of the development chapter returns none. Only 'accessory structures (residential)' — non-habitable buildings — are permitted (§2-7.9).
What is the maximum ADU size in Casselberry?
Casselberry sizes only non-habitable accessory structures: ≤500 sq ft by right; over 500 sq ft requires conditional-use approval (§2-7.9). There is no ADU size because there is no ADU use.
Do I need to be an owner-occupant to build an ADU in Casselberry?
No rentable accessory dwelling exists in Casselberry — accessory structures under §2-7.9 are non-habitable and cannot be rented as living units.
Can I use my Casselberry ADU as an Airbnb?
Short-term rentals under 30 days are prohibited in Casselberry. The minimum rental period is 30 days.
How do I get an ADU permit in Casselberry?
ADU permits in Casselberry follow standard Florida residential building permit workflow. Contact Seminole County building department for current requirements.
Nearby Cities — ADU Rules
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This page provides general information based on current ordinances and publicly available data as of 2026-07-15. Zoning rules change — verify all requirements with your local planning department before making financial commitments.