4 Things to Check Before You Buy a House Plan

Most plan regrets don't start at the job site. They start weeks earlier, when a floor plan looked perfect on screen and nobody asked the harder questions. For example, a garage that won't clear the side setback. A west-facing wall of glass that bakes all summer. A builder bid that came in higher than expected because the square footage you budgeted for wasn't the square footage being built.

The good news is that almost all of these problems can be caught before you buy. Here are the four checks we walk every client through, and what to look for in each one.

Setbacks. Your city, county, or HOA sets minimum distances from the front, side, and rear property lines. On a 60-foot-wide lot with 7.5-foot side setbacks, you have 45 feet to work with, not 60.

Easements and utilities. Look for utility, drainage, or access easements on your survey. You usually can't build over them.

HOA and deed restrictions. Many Texas subdivisions set a minimum square footage, a required masonry percentage, roof pitch, garage orientation, or even approved exterior styles. Get the architectural guidelines before you choose a plan, not after.

Slope and drainage. A plan designed for a flat slab lot may need foundation changes on a sloped site. Water should always drain away from the house.

Septic and well placement. On rural acreage, the septic field and its required clearances can take up more room than you expect.

Garage and driveway access. A front-entry garage and a side-entry garage need very different lot widths. Picture how you'll actually pull in.

Pro tip: Get a copy of your lot survey and sketch the plan's footprint on it to scale. If the fit is tight on paper, it will be tighter on site.

A plan drawn for Minnesota won't live well in Houston. In Texas, climate should shape the design as much as style does.

Here's what to look for:

Orientation and sun exposure. Large windows facing west will take the full force of the afternoon sun. Think about how the plan will sit on your lot and where the living spaces and outdoor areas will face.

Roof overhangs and porches. Deep overhangs and covered porches shade walls and windows, cut cooling costs, and make outdoor space usable for more of the year.

Wind and storm requirements. Coastal counties have windstorm codes that affect roof framing, connections, and window ratings. Make sure your plan can meet them.

Humidity and ventilation. Good attic ventilation, room for a properly sized HVAC system, and mechanical space that's easy to service all matter in a hot, humid climate.

Energy code. Your local jurisdiction's energy code affects insulation, windows, and equipment. Ask your builder what your area requires.

Pro tip: A plan designed with Texas living in mind (think deep porches, split bedroom layouts, and indoor-outdoor flow) will usually need fewer climate-related changes than one adapted from another region.

This is the check that catches the most people off guard. The number in big print on a plan is usually the heated (or living) square footage, meaning the conditioned space inside the house. But your builder is building much more than that.

Total square footage, often called total under roof, includes everything with a foundation and a roof over it:

• Garage

• Front and back porches

• Covered patios and outdoor kitchens

• Storage rooms and unconditioned spaces

Why it matters: A 2,400-square-foot home with a three-car garage and wraparound porches can easily top 3,500 square feet under roof. Foundation, framing, and roofing costs follow that larger number. If you set a budget from heated square footage alone, your bids will surprise you.

When comparing plans, look at both numbers side by side. Also ask how your builder prices: per heated square foot, per total square foot, or line by line. The same plan can look very different depending on the method.

Pro tip: Two plans with the same heated square footage can have very different construction costs. The one with more porch, patio, and garage space costs more to build.

A house plan isn't one drawing. It's a set of sheets, and what's included varies by designer. Knowing what you're getting helps you avoid paying for extra drafting later or having your permit application sent back.

Also ask about what's usually not included, because you'll need to plan and budget for it separately:

Pro tip: Before you buy, call your local permitting office and ask what they require for a residential permit. Then compare that list to the plan set contents.

The Checks That Come Next

Lot fit, climate, square footage, and plan set contents are the foundation. They aren't the whole picture, though. Before you commit, you'll also want to review how the layout works for your daily routine, which modifications you'll need (and what they'll cost), and which questions to ask your builder before you sign anything.

We put all of it in one place.

Download the Free Before You Buy a House Plan Checklist

Our Before You Buy House Plan Checklist walks you through every step: lot fit, climate, plan set contents, square footage, layout, modifications, and builder questions. It's a simple printable you can bring to your lot, your lender, and your builder so nothing gets missed.

Download the free checklist here →

Buying a house plan is one of the first big decisions in building a home. Take a few extra minutes up front, and you'll build with confidence, not regret.

Have questions about a specific plan? Contact our team. We're happy to help you figure out whether it's the right fit.