ADU Rules & Zoning in Spring Hill, Florida (2026)
What ADU can you build in your Spring Hill backyard?
Instant zoning report — see exactly what your zoning allows: permitted ADU types, size limits, setbacks, and lot requirements for your specific property.
ADU Rules in Spring Hill, Florida
We've researched Spring Hill'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.
- Maximum ADU size is 1,000 sq ft under Florida SB-48 — Spring Hill follows the statewide baseline
- Spring Hill is UNINCORPORATED Hernando County — there is no 'City of Spring Hill'; permits go through Hernando County Building
- No owner-occupancy requirement — investor-friendly; Spring Hill is one of Tampa Bay's fastest-growing bedroom communities
- No HVHZ — Spring Hill's inland location (25 miles north of Tampa) means standard wind construction, not HVHZ requirements
- Very large residential lots typical (10,000–15,000+ sq ft) — most Spring Hill properties can easily accommodate a detached ADU
- Short-term rentals allowed under Florida law; Hernando County STR registration required
- Construction $85,000–$160,000 (no HVHZ premium); rental income $950–$1,500/month — one of Florida's most affordable ADU markets
Last verified: 2026-03-14
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Backyard ADUs like this are being built across Spring Hill — here's how to do it right.
Here's exactly what Spring Hill zoning allows
ADU rules for Spring Hill, Hernando County. Verify all requirements with local planning.
Zoning allowance
ADUs are permitted in eligible residential zones in Spring Hill under Florida SB-48 (2026). Confirm your parcel zoning with the Hernando County Property Appraiser or city planning office.
Size limits
Maximum ADU size in Spring Hill varies by zoning district. Florida SB-48 prohibits size limits below 1,000 sq ft for compliant applications. Verify current local limits.
Lot + setbacks
Setback requirements vary by zoning district in Spring Hill. Confirm exact setbacks with Hernando County planning.
Height + coverage
Height and lot coverage limits vary by zoning district. Check Spring Hill zoning code.
Parking
Parking requirements for ADUs in Spring Hill vary by zoning district. Verify with local planning.
Rental / occupancy
Spring Hill does not require owner-occupancy under Florida SB-48 (2026). Verify current local rules.
Permit process
ADU permits in Spring Hill follow standard Florida residential building permit workflow. Contact Hernando County building department for current requirements.
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Building limits and rental rules, side by side
These two sets of rules determine what you can build and what income you can expect. Read both before you commit to a design or a rental strategy.
Building Limits
- Max Size:1,000 sq ft
- Setbacks:5ft side / 10ft rear
- Detached Allowed?Yes
- Max Height:25 ft
- Build Cost Est.:$75,000–$150,000
Rental Rules
No Owner-Occupancy Requirement: Both units can be rented to tenants simultaneously.
Short-Term Rentals: Not prohibited at the city level. State DBPR license required.
Estimated Monthly Income
$800–$1,300/month
Based on 2025–2026 Spring Hill market data
ADUs are NOT Permitted In:
- Properties platted with Hernando County deed restrictions (some older subdivisions have 'single-family only' covenants) — verify at Hernando County Clerk
- FEMA Special Flood Hazard Areas near Weeki Wachee River and coastal tributaries — verify flood zone before designing
- Commercial zoning along Spring Hill Dr, Mariner Blvd, and US-19 — not applicable for residential ADUs
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 Spring Hill permit process step by step — so you know exactly what's coming, and what to prepare.
Step 1: Pre-Application Zoning Check
- Where:
- Hernando County Building Division, 789 Providence Blvd., Brooksville, FL 34601
- Contact:
- (352) 754-4050
- 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:
- https://www.hernandocounty.us/departments/departments-n-z/planning-and-zoning
- Contact:
- (352) 754-4050
- What to bring:
- Architectural plans, site plan, boundary survey, energy compliance docs
- Timeline:
- Plan review: 2–4 weeks (Hernando County is less backlogged than metro counties)
- Cost:
- $3,950–$9,100 in permits and fees — among Florida's lowest ADU permit costs
Step 3: Plan Review & Revisions
- Where:
- Hernando County Building Division
- Contact:
- (352) 754-4050
- What to bring:
- Responses to any correction letters; revised drawings if required
- Timeline:
- Plan review: 2–4 weeks (Hernando County is less backlogged than metro counties). Inspections: 4–7 weeks. Total: 2–4 months.
- Cost:
- No additional fee for standard resubmittal
Step 4: Construction & Inspections
- Where:
- Spring Hill Building Department
- Contact:
- (352) 754-4050
- 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
Full Spring Hill Permit Cost Breakdown
These are the fees you'll encounter, in the order you'll typically encounter them.
| Cost Item | Amount / Notes |
|---|---|
| Total Estimated Cost | $3,950–$9,100 in permits and fees — among Florida's lowest ADU permit costs |
| Building Permit Fee | $1,000–$2,200 (Hernando County Building) |
| impact fees hernando | $2,000–$4,500 (transportation, parks) |
| Plan Review Fee | $250–$600 |
| Utility Connection Fees | $700–$1,800 (Spring Hill Water/Sewer or well/septic) |
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Key ADU Restrictions in Spring Hill
These are the rules that most often catch homeowners by surprise. Read them carefully before engaging an architect.
- Spring Hill is unincorporated Hernando County — permits and approvals go through the county, not a city building department
- Deed restrictions are common throughout Spring Hill subdivisions — many were platted with HOA covenants restricting rental use
- Hernando County building department requires all ADU work to be fully permitted and inspected — no owner-builder exemptions for rental units
Common Mistakes to Avoid in Spring Hill
- Spring Hill has no city government — do not contact a 'City of Spring Hill'; permits go through Hernando County Planning and Zoning
- Subdivision deed restrictions in Spring Hill are commonly recorded and actively enforced — pull your title and recorded plat before planning
- Inland location means lower construction costs but also significantly lower rental rates than Tampa Bay or coastal markets
Eligible Zones in Spring Hill
ADUs are permitted by-right in these zoning districts. Verify your parcel at the county GIS portal — most homeowners can confirm their zone in under 5 minutes.
Spring Hill neighborhoods where ADU permits are being filed — is your street next?
Spring Hill ADU — Frequently Asked Questions
These are the questions we hear most often from Spring Hill homeowners. If yours isn't here, our ADU Zoning Experts can answer it directly.
Why does Spring Hill process permits through Hernando County instead of its own building department?
Spring Hill is an unincorporated community within Hernando County — it's a large residential area (population ~120,000) but not an incorporated municipality. All permits, zoning, and code enforcement go through Hernando County government in Brooksville. This is actually an advantage: county processes are often less congested than larger city departments, resulting in faster approvals.
Are Spring Hill's lots large enough for detached ADUs?
Yes — Spring Hill's typical residential lots are 10,000–15,000 sq ft, significantly larger than most South Florida suburban lots. This generous lot size, combined with standard 7 ft side and 10 ft rear setbacks, allows most Spring Hill properties to accommodate a 600–1,000 sq ft detached ADU while maintaining comfortable yard space. Run a survey to confirm your buildable envelope.
Is Spring Hill a good ADU investment given its distance from Tampa?
Spring Hill is approximately 25–35 miles north of Tampa, making it a bedroom community for Tampa Bay area workers. The rental market is driven by Brooksville Regional Hospital employees, the growing remote-work population, and retirees. At $85,000–$160,000 construction cost and $950–$1,500/month rental income, Spring Hill ADUs offer some of Florida's best cash-on-cash yields — though appreciation potential is lower than closer-in Tampa neighborhoods.
Are there water and sewer connections available throughout Spring Hill?
Spring Hill has city water and sewer service in most areas, but some outer parcels are still on well and septic systems. A new ADU with a separate entrance typically requires its own utility connection — verify service availability with Hernando County Utilities at (352) 754-4145 before designing. Adding a septic system for an ADU on an existing septic parcel may require a new drain field — factor this cost into your budget.
What are common reasons ADU projects in Spring Hill get delayed?
The most common delays are: (1) incomplete site plans missing utility locations and survey data, (2) septic/drain field evaluation requirements for non-sewer parcels, (3) FEMA flood zone verification near Weeki Wachee River and wetlands, and (4) deed restriction discovery after design work is done. Run a title search and flood zone check before engaging a designer.
Find out what ADU you can build in your backyard
— and get a free Spring Hill ADU guide for your area.
Free report · No commitment · 60 seconds
Find out what ADU you can build in your backyard
— and get a free Spring Hill ADU guide for your area.
Free report · No commitment · 60 seconds
Spring Hill Planning Department
We recommend calling Hernando County Building Division at (352) 754-4050 before submitting anything — a 10-minute conversation can save weeks of back-and-forth on your permit application.
Hernando County Building Division
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This page provides general information based on current ordinances and publicly available data as of March 2026. Zoning rules change — verify all requirements with your local planning department before making financial commitments.