Building on Your Own Lot in Southwest Florida What to Know First

By Derrick Henderson, President of Lifestyle Design Homes and a Florida Certified Building Contractor with more than 20 years in construction across Southwest Florida. Updated September 2026.

Before you buy a lot in Southwest Florida, check fourteen things, and bring the builder in before you close. Building on your own lot starts with the land, not with the floor plan. The purchase price is only one part of the cost: a $30,000 homesite can need more site work than a $300,000 one that already has utilities, elevation, drainage, and access in place. This guide lists the checks, explains the ones that surprise buyers most, and shows what happens when you bring us a lot you already own.

In this guide

• The 14 checks before you buy
• What makes a lot difficult to build on
• Setbacks: how much of the lot you can use
• Flood zone and elevation
• Well and septic
• What happens when you bring us a lot
• When we advise against a lot
• When the plan does not fit the lot
• Collier County and Lee County
• Where we build on your lot
• Frequently asked questions

What should you check before buying a lot?

Fourteen things. Most of them can be checked before you make an offer, and a builder can check the rest in one site visit.

Check	What it tells you	Where to look
1. Lot dimensions	Width, depth, and shape, which decide which plans can fit	The listing, then the survey
2. Survey	Legal boundaries, easements, and encroachments	A current boundary survey by a licensed surveyor
3. Zoning and use	Whether a single-family home is allowed, and the size and height limits	The county zoning map and Land Development Code
4. Building setbacks	How far the home must sit from each lot line	The zoning district table for the lot
5. Flood zone and required elevation	How high the finished floor must be, and how much fill that takes	The county flood map for the address
6. Utility availability	Whether water, sewer, electric, and gas reach the lot, and how long the runs are	The utility providers for the address
7. Well and septic requirements	Whether the home needs its own water and wastewater systems, and which type	The county and the Florida Department of Environmental Protection
8. Drainage and site conditions	Standing water, low spots, soil, and the fill the lot needs	A site visit after heavy rain, and soil information
9. Wetlands and environmental conditions	Areas that may not be buildable at all	The survey, county maps, and an environmental review where they flag it
10. Protected species	Habitat that can restrict clearing or add review time	The same environmental review
11. Road and access conditions	Whether construction equipment and deliveries can reach the site	A site visit. Unpaved and private roads matter
12. HOA and community restrictions	Architectural review, plan approval, and material rules	The community documents, before you sign
13. Waterfront and seawall conditions	Seawall age and condition, and coastal construction rules	A seawall inspection and the county
14. Whether the home fits	The buildable area left after setbacks, easements, septic, and drainage	The builder, with the plan drawn on the survey

Our main recommendation: involve the builder before you close on the land, whenever possible. Everything below explains why.

What makes a lot difficult or expensive to build on?

Thirteen conditions come up again and again in Southwest Florida. They fall into three groups.

One of the biggest surprises for buyers is that two lots selling for similar prices can have very different development costs. There is no responsible single number for site work. A cleared infill lot with utilities at the street is a different project from land that needs fill, clearing, drainage work, and a long utility connection. That is why we evaluate the lot before we treat the construction price as the whole budget. Our guide to planning a custom home budget covers the other lines, including 2026 land prices in six cities.

How much of the lot can you build on?

Less than the lot size suggests. Setbacks are the minimum distances between the home and each lot line, and they are set by the zoning district. In Collier County’s Estates (E) district, which covers most of Golden Gate Estates, the Land Development Code requires 75 feet from the front lot line, 30 feet from each side, and 75 feet from the rear. The same table sets a minimum lot of 98,010 square feet, about 2.25 acres, a minimum width of 150 feet, and a maximum building height of 30 feet.

On a lot 150 feet wide and 660 feet deep, that leaves a buildable area 90 feet wide and 510 feet deep. Easements, the septic drain field, the well, drainage, and the pool all have to fit inside it too. Setbacks are measured from the legal boundary of the lot, not from easements, except where an easement is a road right-of-way.

Other districts use other numbers. RSF-3, one of Collier County’s single-family districts, requires 30 feet at the front, 7.5 feet at each side (10 feet on waterfront lots), and 25 feet at the rear. Lee County and the cities, including Naples, Marco Island, Bonita Springs, Estero, Fort Myers, and Cape Coral, have their own codes. Communities with architectural review add their own rules on top. We check the district for every lot before the first drawing.

What does the flood zone change?

The flood zone sets the elevation the finished floor has to reach. That elevation sets how much fill the lot needs, how the site drains, and on some lots the type of foundation. On many lots it is the item that changes the budget and the design most before any vertical construction begins.

In Collier County, you can look up the zone for an address on the county’s flood map. The county also keeps an elevation certificate map, where you can check whether a certificate is already on file for an existing structure. The certificate records the elevation of the structure and is prepared by a professional surveyor and mapper. The county’s Flood Information Hotline is (239) 252-2942. Lee County publishes its own flood maps, with new FEMA maps taking effect on March 2, 2027.

Do you need a well and septic system?

Only where public water and sewer are not available. That is common in Golden Gate Estates, Lehigh Acres, Alva, Buckingham, and other larger-lot or rural areas of Southwest Florida. For planning purposes, expect a well and septic system together to add roughly $20,000 to $40,000 or more, depending on the property, the system design, the soil, and whether an enhanced treatment system is required.

Since July 2023, Florida law requires an enhanced nutrient-reducing septic system instead of a conventional one for new systems on lots of one acre or less inside designated Basin Management Action Plan areas, which include parts of Lee County. The Florida Department of Environmental Protection sets the permitting rules. These systems cost more and take more design work.

Both systems add time during pre-construction. They need their own design, permitting, site planning, and inspections, and the septic location has to be coordinated with the home, the pool, the driveway, drainage, setbacks, and the well before construction begins. They also need ongoing care: septic tanks need periodic pumping and inspection, and private wells need attention to water quality, filtration, and equipment. For our clients, we coordinate the monthly maintenance and service, so the systems are not left to the owner to manage.

What happens when you bring us a lot you already own?

We start with two things: what you want to build, and what the property allows. The process runs in seven steps.

The question is not only whether a house fits. It is whether the right home for you can be built responsibly on that site.

Have we ever told someone not to buy a lot?

Yes. We have advised prospective clients against purchasing property when the lot conditions, the required improvements, or the overall economics did not make sense for what they were trying to build.

“We have had clients bring us properties they were considering purchasing because the price of the land looked like a great deal. Once we evaluated the property from a construction standpoint, there were site conditions that could have created significant additional costs to make the lot buildable.”

Derrick Henderson, President

Many buyers rely on their Realtor when searching for land, and a strong Realtor is an important part of the process. Evaluating whether a property is suitable for construction is a different skill. Setbacks, elevation, flood requirements, utilities, drainage, access, fill, permitting, and site development costs all decide whether a lot is a good fit. We work alongside the Realtor to review the properties you are considering, so the search moves toward land that supports the home, the budget, and the project.

We would rather advise you against a property than let you buy land that creates cost, limitations, or complications later.

What if the plan you love does not fit the lot?

It happens more often than people expect, and the answer is rarely to force the plan onto the land.

“I love the direction of the home, but I don’t want to force a house onto a lot that isn’t right for it. Let’s figure out what you love most about this plan and see whether we can adapt those elements to your property. If we can’t do that without compromising the home, then I’d rather tell you that now and help you find the right solution.”

Derrick Henderson, President

Our custom home floor plans are meant to be adapted to the lot. Whether a plan fits as drawn, needs modification, or calls for a custom design is one of the first things we settle. The land decides which changes make sense.

How do Collier County and Lee County differ?

Both require careful pre-construction planning, but permitting costs, impact fees, review processes, utility conditions, municipality requirements, and processing times vary by jurisdiction. Collier County projects, particularly inside Naples-area communities, may also involve community architectural review or design requirements. Lee County varies by municipality and by whether the property uses municipal utilities or well and septic.

Impact fees are one example. As of May 1, 2026, Collier County charges $34,051.97 for a single-family home under 4,000 square feet of living area, including county water and sewer. Lee County and the cities publish their own schedules. We confirm the figure for the specific address during pre-construction.

Where do we build on your lot?

Across Southwest Florida: Naples and Golden Gate Estates, Marco Island, Bonita Springs, Estero, Fort Myers, Lehigh Acres, Alva, and Buckingham. See where we build across Southwest Florida for how each area differs in lot size, utilities, and review process, and our custom homes in Naples page for how the design-build process runs on your lot.

If you do not own land yet, land and financing can be handled in the same conversation. Our guide to construction loans in Florida explains how. And if timing matters more than the search, we keep permitted homes on lots we already own. They are tagged Ready to Build on our available homes page.

Frequently asked questions

Before you close on the land