ADU, prefab & backyard home
Foundation-built ADUs and backyard units for income, family, or flexible living—with Florida rules, estimating tools, and (when you want them) EarthNest-style permaculture upgrades.
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Florida Prefab Living Systems
Florida Prefab ADUs, Backyard Homes & Eco-Conscious Living Systems
We help Central Florida homeowners and investors explore legal, foundation-built ADUs and prefab backyard homes—plus curated tiny home communities and optional EarthNest-style food, water, and soil systems. Dabble with one upgrade or stack the full loop.
Tiny communities (Florida) · Zones & homestead tool · Resources
$1,400–$2,500
Est. ADU Monthly Rental Income
Prefab + Site-Built
ADUs, Backyard Homes & Flex Units
Florida-Ready
Code, Climate, Water & Energy Aware
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Start here
What brought you here today?
Pick the lane that matches your goal—ADU income, a tiny community pad, or full regenerative homestead planning. Every path includes optional permaculture education (food, water, soil, stacking functions) so you can dabble or go all-in without losing the thread.
Tiny home communities
Curated Florida villages and intentional clusters—lease models, amenities, and outbound links so you can vet operators. Same permaculture resources apply when you’re ready to grow food on your pad.
Regenerative homestead & food systems
Zones, lunar rhythm prompts, closed-loop fertility, and EarthNest layers—optional for dabblers, central if you’re going all-in. Pick what fits; we don’t force a one-size path.
Learn first (free)
Course, rules pages, tiny-living guide, and resources hub—build context before you commit. Permaculture and ADU threads cross-link so you can deepen over time.
Working with our team on a build or evaluation? You’ll still get curated links to rules, climate tools, and regenerative ideas—contact us if you’re unsure where to start.
Step 1 of 10
Find out if your property qualifies for an EarthNest ADU.
Answer 10 quick questions. We'll show you your recommended path, estimated cost range, and next steps — in under 2 minutes.
The Backyard Opportunity
Unused Land Can Become a Smarter Living System
Most homeowners have land sitting unused behind the house. That space could become rental income, family housing, a guest suite, a home office, a downsizing option, or the first layer of a more sustainable Florida living system. We help make the path practical: zoning, feasibility, design, permitting, and build coordination.
Backyard Income
$1,200–$2,500/moExplore long-term rental potential from a legal, foundation-built ADU without selling the property you already own.
Family Flexibility
One Lot, More OptionsCreate space for parents, adult children, guests, work, retreat, or future downsizing with code-aware planning.
Eco-Living Foundation
Systems Over StructuresStart with shelter, then add staged resilience through energy, water, landscape, healthy materials, and automation.
$2,500
Potential monthly rental — ADU alone
What We Build
What Is an ADU?
An ADU — Accessory Dwelling Unit — is a legal second home built on your existing residential property. Think of it as a fully independent living unit: its own entrance, kitchen, bathroom, and everything a renter needs to call it home.
Every ADU we build is a permanent, foundation-built structure that goes through the full county permitting process. No shortcuts. No gray areas.
What We Build
- Foundation-built permanent structure
- Fully permitted by the county
- Florida Building Code compliant
- Custom-designed for your lot
- Site-evaluated and zoning verified
What We Don't Do
- Tiny homes on wheels
- RV-style or temporary units
- Non-permitted structures
- One-size-fits-all solutions
Every property is different. Before any work begins, we conduct a full site evaluation covering zoning, setbacks, utility access, and feasibility — at no cost to you.
Product Lanes
EarthNest 20, EarthNest 40, or a Traditional ADU.
Start with the structure that fits your property and goals, then layer in the right sustainability, landscape, water, and automation options over time.
Entry Prefab Studio Concept
EarthNest 20
Size
~160 sq ft
Layout
Studio / Flex Space
Installed
$50K – $100K+
Rent
Not listed for this model
- 20ft container hybrid / modular
- Concrete slab foundation
- Engineered to Florida Building Code wind load requirements for Central Florida
- Closed-cell spray foam insulation
- Kitchenette, bath, efficient HVAC, and solar-ready infrastructure options
- Smart monitoring and edible landscape starter package available
Best For
Backyard studio ADU where allowed, guest suite, office, retreat pod, starter eco-living model, or creative studio — not intended as a rentable ADU in Orange County (unincorporated).
WARNING: At ~160 sq ft, this unit does not meet Orange County's 400 sq ft minimum for a permitted ADU. It is best suited for non-rental uses such as a guesthouse, office, or studio. Eligible uses vary by jurisdiction — we'll confirm during your free site evaluation.
Expanded 1-Bedroom Prefab System
EarthNest 40
Size
~320 sq ft
Layout
Studio + Sleeping Area
Installed
$100K – $155K+
Rent
Not listed for this model
- 40ft container hybrid / modular
- Concrete slab foundation
- Engineered to Florida Building Code wind load requirements for Central Florida
- Closed-cell spray foam insulation
- Sleeping area, kitchen, bathroom, living area, and mechanical/storage zone
- Solar/battery-ready, water/landscape-ready, and smart monitoring options
Best For
Premium backyard ADU where allowed, long-term guest suite, family housing, eco retreat unit, primary tiny home concept, or future community model.
WARNING: At ~320 sq ft, this unit falls below Orange County's 400 sq ft ADU minimum. Eligible as a permitted ADU in some surrounding jurisdictions. Your free site evaluation will confirm what's possible on your specific property.
Fully Custom
Traditional Site-Built ADU
Size
Custom
Layout
Studio, 1BR, or 2BR
Installed
$200K+
Rent
$1,400 – $2,500/mo
- Traditional stick-built or CMU block
- Concrete slab foundation
- Engineered to Florida Building Code wind load requirements for Central Florida
- Matches primary home style
- Fully custom design & layout
- Compatible with staged eco upgrades and smart monitoring options
Best For
Family member housing, larger rental unit, higher-end backyard home, custom layout, and property-value strategy.
Not sure which model fits your property? We'll help you decide.
Start With a Free EvaluationADU Calculator
ADU Investment Calculator
Conservative, location-aware underwriting for Central Florida ADU projects.
Section 1 — Your Property and Build
In Orange County (unincorporated), minimum ADU size is 400 sq ft. Maximum is 1,000 sq ft or 45% of your primary home's living area, whichever is less.
Includes design, permitting, construction, and inspection. Does not include land cost. Final cost confirmed after free site evaluation.
Section 2 — Financing
= $15,000
Loan amount: $60,000
Est. monthly loan payment: $483
Section 3 — Monthly expenses and assumptions
These are conservative estimates. Actual expenses vary. Review with a CPA before making financial decisions.
Start by selecting your location and ADU type to view investment results.
Want numbers specific to your property?
The calculator gives you a market-rate estimate. A free site evaluation gives you actual zoning, buildable area, and a real cost range for your specific lot.
What Orange County Requires
Official Permitting Requirements
We follow every Orange County regulation exactly. Here's what the county requires for each ADU type, sourced directly from orangecountyfl.net.
Orange County Eligibility Requirements — Know Before You Build
Before any building permit can be issued, Orange County requires ADU projects to meet the following baseline eligibility standards. EarthNest Florida verifies all of these during your free site evaluation.
Owner-Occupancy / Homestead Requirement
The primary single-family dwelling and the ADU must remain under single ownership at all times. The owner must occupy either the primary home or the ADU as their principal residence. The property must be homesteaded. A Certificate of Occupancy will not be issued until homestead status is confirmed.
Special Exception Approval
In most Orange County residential and agricultural zoning districts, an ADU requires approval as a Special Exception — a separate zoning review process — before a building permit can be applied for. EarthNest Florida coordinates this step as part of your project process.
ADU Size Limits
- Minimum: 400 sq ft of living area
- Maximum: 45% of the primary home's living area OR 1,000 sq ft — whichever is less
- Exception: Lots 2 acres or larger have a maximum of 1,500 sq ft
- Maximum: 2 bedrooms
Lot Size Requirement
A detached ADU may only be built on a lot that is at least 1.5x the minimum lot area required for a single-family dwelling in that zoning district.
Setbacks — Detached ADU
- 1-story: Minimum 5 ft from rear property line
- 2-story: Minimum 15 ft from rear property line
- Minimum 10 ft separation between the ADU and primary dwelling
- Side setbacks: Must meet principal structure minimums for the zoning district
Short-Term Rental Restriction
Orange County prohibits short-term rentals (under 30 days) in most residential zones. ADUs may only be rented under standard long-term residential leases. Short-term rental platforms (Airbnb, VRBO, etc.) are not a permitted income strategy for ADUs in Orange County (unincorporated).
Note: Requirements vary by municipality. The City of Orlando, Osceola County, Seminole County, and Lake County each operate under their own ADU rules. EarthNest Florida reviews the specific requirements for your parcel as part of the free evaluation.
Source: Orange County Zoning Code Section 38-1426 and orangecountyfl.net/PermitsLicenses/Permits/ResidentialAccessoryDwellingUnit.aspx
Type 1 — Attached ADU
Addition to primary residential unit
Submission Requirements
- Site plan or survey showing location
- Lot Grading/Drainage Plan + finished floor elevation
- Construction Plans by FL Licensed PE or Architect
- Existing AND proposed floor plans (all rooms labeled)
- Emergency Escape & Rescue Opening (EERO) in every sleeping room
- Fire separation between units per FL Building Code
- Construction Documents
- Energy Calculations + ACCA Manuals J, S, D + EPL card (if HVAC)
- Mechanical duct layout (if installing/modifying)
- Truss engineering by FL Licensed PE (if applicable)
- Orange County Product Approval Specification Sheet
Type 2 — ADU Alteration
Convert existing space in primary unit
Submission Requirements
- Construction Plans by FL Licensed PE or Architect
- Existing + proposed floor plans (all rooms labeled)
- Emergency Escape & Rescue Opening (EERO) in sleeping rooms
- Fire separation between units per FL Building Code
- Construction Documents
- Energy Calculations + ACCA Manuals + EPL card (if HVAC)
- Mechanical duct layout (if modifying ductwork)
- Truss engineering (if applicable) — signed & sealed
- Orange County Product Approval Specification Sheet
Type 3 — Detached ADU
Separate structure (EarthNest Model)
Submission Requirements
- Site plan or survey showing location
- Lot Grading/Drainage Plan + finished floor elevation
- Construction Plans by FL Licensed PE or Architect
- Fire separation (when applicable) per FL Building Code
- Construction Documents
- Energy Calculations + ACCA Manuals + EPL card (if HVAC)
- Mechanical duct layout (if modifying ductwork)
- Truss engineering (if applicable) — signed & sealed
- Truss layout from manufacturer
- Orange County Product Approval Specification Sheet
The Permit Application Process
- All applications submitted via Orange County Fast Track Online Services portal
- A licensed contractor MUST accept permit issuance
- Owner-builder exemption available under F.S. 489.103(7)(a)
- All permits require inspections, including mandatory final inspection
- Inspections scheduled & managed via Fast Track portal
Questions? Contact Orange County
Zoning & Site Plan Questions:
(407) 836-3111Zoning@ocfl.netBuilding Inspections & Permit Status:
(407) 836-5550Building Safety Division
Important Disclaimer
ADU permitting requirements are sourced from Orange County's official permit information page and are subject to change. Requirements vary by project type, zoning, site conditions, and local amendments. Always verify current requirements directly with Orange County at orangecountyfl.net or by calling Orange County Zoning at (407) 836-3111 or Building Inspections at (407) 836-5550 before beginning any project. EarthNest Florida handles all zoning verification and permitting coordination as part of your free property evaluation.
Investor Deal Breakdown
See the Full Picture Before You Build
Real numbers. Real scenarios. Understand exactly what an ADU investment looks like in Central Florida.
Model — Traditional Site-Built ADU (1BR)
Most Popular Permitted OptionProperty Purchase$260,000
ADU Construction (installed, permitted)$200,000+
Total Project Cost$460,000 – $540,000
Estimated After Value$520,000 – $600,000
Estimated Equity Gain$60,000 – $140,000+
ADU Monthly Rent
$1,400 – $2,500/mo
Combined Rental Potential
$2,600 – $4,500/mo
Rent both units — the main house plus the ADU — for maximum monthly cash flow.
Forced Appreciation
Instant Equity on Completion
A permitted ADU adds permanent value. You build equity the day the project completes.
Disclaimer: All figures are illustrative estimates only and are not guaranteed. Container unit price reflects unfinished unit cost only. Total installed cost includes site preparation, foundation, permitting, utility connections, insulation, HVAC, and interior finishing. Final project costs vary based on site conditions, local jurisdiction requirements, and design selections. Rental income projections reflect current Orlando-area market conditions and are not guaranteed. PreFabricated.co does not provide legal, financial, or tax advice.
Our Process
From Concept to Keys — 7 Steps
Every project follows the same structured approach. You always know where you are in the process and what comes next.
Start Step 1 — Free Evaluation01
Property Evaluation
We visit your property and assess lot size, access, drainage, utility hookups, and overall build viability — free of charge.
02
Zoning & Feasibility
We review your property's zoning classification, confirm homestead eligibility, verify the special exception approval requirement, check setbacks and lot size minimums, confirm ADU size limits based on your primary home's square footage, and verify HOA restrictions if applicable — before any design work begins.
03
Special Exception Filing
For most Orange County residential properties, we prepare and submit the Special Exception application to Orange County's Planning Division on your behalf. This is the required zoning approval step before a building permit can be applied for. We manage the timeline and follow-up so you don't have to.
04
Design
You choose your layout and style. We work with our design team to produce engineered plans tailored to your property and preferences.
05
Permitting
We submit all required documents to Orange County and manage the full permit process. No surprises. No shortcuts.
06
Build
Our vetted construction team builds your ADU to Florida Building Code standards with quality materials and clear timelines.
07
Rent or Sell
Once your ADU passes final inspection, you're ready to rent it out — or use it to increase your property's market value.
EarthNest Florida
20ft Container + Hybrid Modular
The EarthNest Model
Eco-Conscious Living Systems Built for Florida
EarthNest is our broader living system concept: shelter, energy, water, food, healthy materials, Florida climate design, and smart monitoring working together. The first practical branch is still the ADU path — foundation-built, code-aware, and evaluated parcel by parcel.
EarthNest 20 and EarthNest 40 introduce compact prefab concepts for guest space, work, retreat, and qualifying jurisdictions. The Traditional Site-Built ADU remains the primary Orange County rental product. We emphasize efficiency, sustainability, staged resilience, and cost-conscious design — not exaggerated off-grid claims.
Florida Climate Adaptation
Designed specifically for Central Florida's heat and humidity with passive cooling strategies, deep overhangs, and optimized ventilation.
Spray Foam Insulation
Closed-cell spray foam provides superior thermal resistance, moisture resistance, and structural integrity in the Florida climate.
Energy-Efficient Systems
Mini-split HVAC systems, LED lighting, and energy-conscious appliances keep operating costs low without sacrificing comfort.
Eco-Conscious Materials
Moisture and pest-resistant materials selected for durability and sustainability in Florida's demanding environment.
Florida permaculture & homestead planning
Plan year-round food systems for your tiny home or regenerative cluster.
Use our interactive USDA zone finder, frost-date primer, current Moon rhythm prompts, Florida-wide hardiness table, and zone-aware homestead report tailored to humidity, heat, and storm-season realities—ideal if you are co-developing edible landscaping around compact dwellings.
Zone-aware calendars
Frost windows, heat-management cues, and succession planting prompts tuned to each Florida band—from Panhandle 8b through Keys 11b.
Closed-loop inspiration
Practical loops that fit small footprints: compost, poultry tractoring, vertical climbers, and calorie-dense tubers for resilient communities.
Open the full closed-loop guide (cards & checklists)ZIP & celestial rhythm
Estimate hardiness by ZIP or city cue, then layer waxing/waning planting notes and sign traditions between frost math and compost loops—always verify USDA ARS maps for perennials.
Who We Are
Strategy Meets Execution
We bring together two critical disciplines — real estate intelligence and construction expertise — under one roof.
Tiffany Baughn
Director of Operations
Client Focused Group | Licensed Realtor
- Real estate strategy & deal sourcing
- Investor relations & partnerships
- Marketing & lead generation
- Client experience & communication
Our goal is to make ADU development accessible, profitable, and stress-free for every homeowner and investor we work with.
Michael Francis
Construction Operations Lead
Build Execution & Site Management
- Contractor coordination & oversight
- Site feasibility assessment
- Build execution & quality control
- Timeline & budget management
Every project gets built right the first time. Permitted, inspected, and built to last in the Florida climate.
Free Course
Learn how to plan your first Florida ADU.
A practical, no-pressure guide to property eligibility, cost, design, permitting, rental income, and EarthNest-style sustainable upgrades.
What you'll learn
- How Florida ADUs differ from tiny homes and RVs
- What makes a property worth evaluating
- How to think about rent, cost, financing, and risk
- How design choices affect code, comfort, and sustainability
Get Started
See If Your Property Qualifies
Fill out the form and we'll review your property details, run a zoning check, and reach out within one business day to schedule your free site evaluation.
No obligation — 100% free evaluation
We cover Orange County and surrounding areas
All evaluations include zoning & setback review
We run a zoning check BEFORE your first call
Quick Pricing Reference
20ft Studio$50K – $100K+
40ft 1-Bedroom$100K – $155K+
Traditional Site-Built$200K+
Builder & Partner Program
Grow With a Reliable Project Pipeline
We're building a network of trusted contractors, subcontractors, and suppliers to support our growing project volume in the Orlando / Orange County area.
If you're a builder or trade professional who does quality work, values process, and wants consistent project flow — we want to hear from you.
What We Offer Partners
- Consistent ADU project pipeline
- Pre-permitted plans & clear scopes
- Organized project management
- On-time payment schedules
- Long-term relationship focus
General Contractors
We're looking for licensed GCs in Central Florida who want a steady pipeline of permitted ADU builds. If you build quality work, we want to talk.
Specialty Subcontractors
Plumbers, electricians, framers, HVAC — we need reliable subs who understand residential ADU work and Florida code.
Material Suppliers
We source locally when possible. If you supply lumber, spray foam, insulation, or modular components, let's explore a preferred vendor relationship.
New resource
Looking for Florida tiny home communities?
We curate stewardship-led villages and parks—from lakefront clusters to Tampa Bay escapes—with region filters and official links so you can research on your own terms. No pricing tables; just transparent summaries.
Nationwide coverage is expanding; Florida is live today.
Inside the directory
- RegionsOrlando, Tampa Bay, Space Coast, Sarasota, Oxford, Osceola, and more—filterable clusters.
- TenancyLease land, pads, cottages, rentals—labeled so rules feel less mysterious.
- Official linksCommunity sites open in a new tab; always verify zoning and occupancy with advisors before you commit.