This is a question for your local building office. They control setbacks and maximum lot coverage. If this is in a development the sales office should be able to help you

As a potential buyer, you should be able to get a copy of HOA documents that provide information on things like that. HOA communities typically have a lot of guidelines or restrictions regarding what you can build. The houses on that particular street all look like they were built by the same builder or at least followed rather tight set of requirements.

If you have a builder buy the lot, and offer a complete finished package, you will lose some control over the project. The lot/house will belong to the builder until you buy it with cash or get a bank loan to buy it.

If there are only a few good lots left in the development, you might not want to hand it over to a builder.

Contact the developer, Lennar at Hilton Head Lakes. Three plans available period.

Front/back/side setbacks from your property lines should be available in your local city zoning documents and/or your HOA. Also factor in FAR, the ratio of house/land that also should be in your HOA and local documents. That will determine the footprint, but also factor in unfinished space such as garage. If you can add a second story, that obviously lets you put a bigger house onto a smaller footprint. It's too localized for anyone to give you an accurate answer.

Go to your local Property tax website and you should be able to find your neighbors' lot sizes and house sizes. My county even shows the footprint and how many sq.ft for living/garage/patio spaces. It might give you a better idea of what your neighbors have managed to build on similar sized lots.

That's a tract builder and tract build. Not custom. You can't do anything you want to do there. Only what they let you do.

Your local regulations regarding setbacks may be online. The front setback appears significant, and the width of the lot is pretty compromised. With those limitations, you could have a really cool house - but it means you REALLY need a person of design talent to maximize your building envelope.

Thank you everyone for your responses @worthy and @Minardi I really appreciate your help abd advice. I have been in contact with matt at the sales office with Lennar and he has been a big help. However this lot and the other lot I am looking at are privetly owned lots left over from when HHL was supposex to be the traditions years ago. apparently because they are privetly owned Lennar has nothing to do with those lots. This is why im asking what i am and will hopefully be able to build my dream home with the HOA’s approveal of my future house plans. Thank you @chispa I will definitely look that up on the property tax website.

You need to check with the local Building Department and see what the building codes for your area are. Your HOA will also have restrictions. These restrictions are local things--there is not some national building code that applies everywhere.

For example, your building code might restrict your home size to a minimum of XXX square feet, forbid 3 stories, and have a maximum of XXX square feet. You might be required to limit the house square footage to 20% of the lot square footage. You might be required to build back 50 feet from the side property lines, 100 feet from the front property lines, and 75 feet from the back property lines.

I would recommend that the future owners of the two remaining non-Lennar owned lots build a home that is equivalent in size, level of finishes, and stature to the entire neighborhood of tract homes that those two lots are nestled in.

Real estate 101.

Does anyone else find it interesting that there appears to be very little elevation change from water to foundation. I see the property is not on Hilton Head which helps but it isn't that far inland either.

OP - Generally, a neighborhood built by Lennar or other major tract builder will have a price point that is lower than custom built homes. When you build a single house, you have to do custom which will cost significantly more than Lennar can build a house for. So your resale will be challenged. Lennar will have made the HOA require certain things from the houses that they do every time anyway. So you will be forced to hit their standards with a much higher price point.

The lot should be priced accordingly - ie cheaper than expected. It still generally will be a bad idea and they will hope for an unsophisticated buyer.

You are an unsophisticated buyer based on your initial question.

To me, it looks like the neighbor to the one side bought extra land to increase the size of his lot. So this lot might be a bit smaller than the average lot in the neighborhood.

The neighbor might appear to have extra land that is actually a drainage easement, between the street/sewers and the pond, that can't be touched by homeowners, other than basic mowing. OP needs to look up all this stuff.

You also need to find out if AC units and generators have to be placed inside the setbacks or can be placed outside of them, which can affect the width of the house by roughly 5 ft at the locations where they need to be placed.

Building a custom in a neighborhood of tract homes is a quick way to lose several hundred thousand dollars in value. Those tract home neighbors control the appraisal value of your build. If it cost you 1.2M to build,(+land cost) and the neighborhood comps are 600K, then you have 800K in cash you need to come up with, plus the land price, before you ever get started.

As everyone else has said, the local building codes dictate what can be done. The builder who developed all the other lots, however, had the ability to do a few things you probably couldn't because they developed the whole neighborhood, so had a different set of requirements when it came to handling drainage, and Storm Water Management Plan; This means there is a defined ratio of permeable to impermeable areas that are allowed on your lot, figured based on the speed of drainage of your specific lot. (The idea is to keep your water on your lot and drain it through your lot, not into your neighbor's yard, not into the water source at the edge of that lot.) Interestingly, two lots next door to each might have totally different ratios due to soil.

When a developer comes in, they do not necessarily have to define each individual lot and solve each lot differently. They solve this with a big puzzle of a plan, perhaps with a neighborhood retaining pond somewhere, swales and green spaces.

As an individual lot owner, with a single builder, your lot may not be included in that plan, so you have to deal with your drainage. And that helps define your footprint and landscaping.