Section one

The three‑way trade, made explicit

A framework we use with clients before anyone opens a plan catalog.

Write your program down in three columns before you look at a single elevation. Nearly every expensive mistake in custom building comes from never having separated these.

Section two

What the market actually wants

Four charts that should shape your plan before your taste does.

1. In North Alabama, single‑story is the default

This is the most useful regional fact in this article. Nationally, one‑story homes are a minority of starts — 48.6% in 2025. In Alabama’s census division they are a clear majority at 61.7%, the highest share of any division in the country. New England, by contrast, builds 74.3% two‑story.

So a rambling one‑level plan is not the “retirement” compromise it reads as elsewhere. Here it is what the market builds, what the market buys, and — as you will see below — what the country is most often purchasing in plan form.

Wide, low and three bays deep. On an acre‑plus Huntsville lot, the single‑story plan is usually cheaper per finished foot to live in, easier to age in, and the form the local resale market reaches for first. The trade is footprint — which is exactly what a bigger lot buys you.

2. Buyers want less house than builders deliver

Buyers said they wanted 2,067 square feet in NAHB’s most recent study. Builders delivered a 2,179 sq ft median — and a 2,411 sq ft average — the same year. The 2024 median of 2,150 sq ft was the lowest in fifteen years.

This does not mean you should build a 2,100 sq ft house on a $475,000 lot. It means square footage has stopped being the thing buyers are impressed by, and that money moved to the wrong place is money you will not see again. The generational split is stark: Millennials prefer 2,408 sq ft, Boomers 1,869. And 70% of Boomers say they would take a smaller home in exchange for higher‑quality amenities — which is a direct instruction about where to put your budget.

3. The wanted list is boring. That is the point.

Nothing in the top of NAHB’s most‑wanted list is exotic. A laundry room. A patio. A front porch. Garage storage. A walk‑in pantry. A full bath on the main level. These are the features that clear 80% — and they are cheap to design in and expensive to add later.

The rejected list is the interesting one, and it should make anyone building at this level pause: the two most actively unwanted built features in the study are an elevator (56% do not want) and a wine cellar (48%) — two of the most reliably specified “luxury custom” indulgences there are.

Eighty percent of buyers want a walk‑in pantry and table space in the kitchen. Neither costs much at the drawing stage. Both are near‑impossible to add once the slab is poured.

4. Know the mix you are building into

Three bedrooms is now the largest share of new construction at 47% — the highest since 2011. Two full baths dominates at 65%, and East South Central leads the nation at 71.6% of starts with two full baths. Three‑plus car garages have fallen from a 2015 peak of 24% to 15% nationally.

Your $1.5M house is not the median house — but the median is the field you are standing out from, and standing out costs money only where it buys you something.

5. Open concept: the evidence genuinely conflicts

You will be told confidently that open concept is dead, and confidently that it is not. Here is the actual state of the evidence:

The synthesis both NAHB and the plan marketplaces have landed on is “zoned” open concept — open sightlines and shared light, with the ability to actually close something off. A cased opening instead of a missing wall. A scullery behind the kitchen. A study with real doors. That is the design move to ask your designer for, and it is a far better brief than “open” or “not open.”

Zoned, not just open. The volume and the sightlines are the part buyers respond to. The part they complain about after two years is the noise, the cooking smells and having nowhere to shut a door.

Section three

The three plans America is actually buying

Not an editor’s pick. A purchase‑count ranking, read on September 5, 2026.

Most “most popular house plans” lists are editorial. One is not. Architectural Designs ranks its 100 Most Popular collection by a disclosed method: “the number of times this plan has been purchased.” That makes it the only genuine sales ranking we could verify, so it is the one we are using.

The pattern matters more than the three plans

Across the top fifteen most‑purchased plans on that list: twelve of fifteen are single story. Eleven of fifteen are Modern Farmhouse. The median is roughly 2,282 sq ft, four bedrooms, three‑car garage. Separately, Houseplans.com reported that Modern Farmhouse accounted for 33% of all their 2025 plan sales, with barndominium plans growing from 8% to 11% of sales year over year.

The layout is the durable part; the skin is the fashion part. A well‑zoned single‑story plan can wear a farmhouse, a European, or a transitional elevation. Choose the plan for how it lives, then choose the exterior for how long you want it to look current.

Section four

Five floor‑plan websites worth your time

Chosen on verifiable differences — catalog, authorship, licensing terms and refund policy — not on which paid us. Nobody paid us.

Honourable mentions, and one we deliberately left off

Advanced House Plans (founded 2002) is worth a look for one specific reason: they design their own catalog in‑house, so the person modifying your plan is the person who drew it — no marketplace handoff. Sater Design Collection is the strongest option if you want luxury Mediterranean or coastal, with a genuinely awarded designer behind it. America’s Best House Plans is a solid family‑run marketplace with 20,000+ plans.

We left Eplans off the top five despite its 60,000‑plan catalog for a simple reason: it and Houseplans.com are corporate siblings under Zonda, so counting both would fake diversity in this list. Its homepage claims of being “the #1 seller of house plans in the US” with “over 60 years of experience” are also unsupported by any published evidence we could find. We also could not reach Southern Living House Plans at all across repeated attempts, so we could not verify anything about it — their editorial best‑seller list is widely syndicated but carries an original publication date of 2013 with no visible revision date, so treat it as a style reference, not current sales data.

Section five

What a plan costs — from $1,100 to $225,000

The single most confusing number in custom building, and why two credible sources disagree by 100×.

The $1,100 set and the $150,000 set are not the same product. One is a licence to build a drawing. The other is a professional standing behind the building.

Read the licence before you buy — this trips up almost everyone

A house plan is not sold to you. It is licensed to you, and the default licence is narrower than most buyers assume.

• Build‑once is the norm. Houseplans.com’s terms grant “a limited, non‑exclusive license to use the Plans to build the home depicted in the Plans one time and one time only.” Building it again requires written consent and a re‑use fee.
• Print rights and build rights are different axes. Architectural Designs’ PDF Light lets you print unlimited copies but build once and forbids modification. Their PDF Plus and Unlimited Build tiers grant repeat builds with no re‑use fee.
• Modification rights are not automatic. Some tiers explicitly prohibit derivative works beyond code‑compliance changes. If you intend to alter the plan — and you probably do — buy a tier that allows it, or buy CAD.
• Study sets carry no build licence at all. They are stamped NOT FOR CONSTRUCTION and exist so you can evaluate before committing.
• PDF versus CAD is a decision, not a preference. PDF is faster and cheaper; CAD is the format your local designer or engineer will want if the changes are substantial.
• Nearly all sales are final. Two of the three largest marketplaces refund nothing, for any reason.

Section six

Who is legally allowed to draw your house in Alabama

The most consequential thing in this article, and the thing almost no homeowner knows.

This is the single most misread sentence in Alabama residential construction. The statute contains a 2,500 sq ft threshold — but that threshold attaches to “any other type building,” not to houses. The Board’s own administrative rule states it plainly: “An architect is not required for design of a detached single‑family residence, a farm building, or utility works, structure or building.”

Where the exemption stops — and it is a Huntsville case

In Stoneridge Homes, Inc. v. Alabama State Board for Registration of Architects (Ala. Civ. App., March 1, 2019), a builder proposed two buildings of ten attached townhouse units each. The City of Huntsville’s building inspector denied the permit because the plans lacked architect certification. The court upheld the Board, holding that a “single family residence building” is “by necessity, a detached single‑family residence.”

So: detached house, any size, no architect required. Attached product — townhomes, duplexes, anything sharing a wall — architect required. If you are building a detached custom home, you are squarely inside the exemption.

But the title is still protected

Alabama Code § 34‑2‑31 makes it unlawful to use the title “architect,” or any derivative, without registration. This produces a distinction most homeowners never notice: a firm may legally design your house without a licence, but may not legally call itself an architect. So you will see practices describing themselves as a “residential design studio” offering “custom residential architecture” — carefully avoiding the noun.

That is entirely legal and often entirely fine. Some of the best residential drawings in this market come from unlicensed designers with thirty years of houses behind them. But you should know which one you are hiring, and right now most buyers do not.

Architect, designer, or draftsperson. All three legally draw detached houses in Alabama. They differ in training, in what they carry insurance for, and in whether anyone is professionally accountable for the building after the drawings are delivered.

The three kinds of people who will offer to draw your house

Eight questions that sort them out fast

1. “Are you a registered architect in Alabama, and what is your licence number?” Not a rude question. If yes, verify it yourself in the state licensee lookup. If no, that is fine — but now you know.
2. “What does your fee include, and where does it stop?” Specifically: does it end at construction documents, or do you stay involved through construction? This is the difference between a $12,000 engagement and a $150,000 one.
3. “How many detached custom homes have you drawn in Madison or Limestone County in the last three years?” Local reps matter more than portfolio glamour — they mean the drawings will clear the local plan review without three rounds of comments.
4. “Who does the structural engineering, and is it included?” Long spans, tall walls, unusual foundations and engineered beams need a sealed engineer’s drawing. Find out now whether that is your cost or theirs.
5. “Will you walk the lot before schematic design?” A designer who will not stand on your dirt before drawing is going to give you a house that could go anywhere — which is the opposite of what you are paying for.
6. “What do you carry for professional liability?” Unlicensed designers often carry none. That may be acceptable to you; it should not be a surprise.
7. “Can I talk to two clients whose houses you drew that are now finished and lived in?” Not under construction. Lived in — for at least a year.
8. “What would you change about this plan for this lot?” Ask it about a stock plan you like. The quality of the answer tells you more than any portfolio.

Section seven

Getting your plan through the building department

Unincorporated Madison County

Enforces the 2018 International Residential Code with local amendments under its 2021 Residential Construction Resolution. A single‑family permit needs a floor plan with heated, unheated and under‑beam square footages; foundation and framing details; mechanical, electrical and plumbing layouts; a site plan showing building lines, easements and property lines; and code compliance notes.

Sealed drawings are not required for a standard single‑family home following prescriptive IRC design. They are required for two‑or‑more‑dwelling structures and for non‑prescriptive engineered systems — which is exactly where a national stock plan can catch you out. Requirements.

City of Huntsville

For a new one‑ or two‑family dwelling: a scaled site plan showing the house on the lot with measurements and all easements; dwelling plans including elevations, footing and foundation plans and floor plans; and the permit application. Submission runs through the city’s ePlans Review system as PDFs; permits are picked up in person. Extra documents apply for variances, owner‑builders, flood zones, historic districts and metes‑and‑bounds lots. Permit page · Inspection Office, 305 Fountain Circle, (256) 427‑5331.

Section eight

Nine plan mistakes that cost the most

Section nine

Ten pro tips for choosing the plan

1. Shortlist three plans, not thirty. Then run a cost‑to‑build report on all three at your ZIP code. You will learn more in an afternoon than in three months of browsing.
2. Walk a finished house built from any plan you are serious about. Plan sites list which builders have built each design. Photographs flatten proportion; a hallway that reads generous on paper often does not in person.
3. Tape it out. Chalk or tape the primary suite and the kitchen on your garage floor or the lot itself. Twenty dollars of tape has killed more bad plans than any consultant.
4. Count the circulation. Add up hallway square footage. On a well‑drawn plan it is remarkably low. Corridor is the square footage you pay for twice — once to build, once to heat — and never use.
5. Put the primary on the main floor. In a division that builds 61.7% single‑story, a two‑story plan with the primary upstairs is swimming against the local current for no premium.
6. Ask for zoned open, not open. Sightlines and shared light, with doors that exist. A scullery behind the kitchen is the single best resale‑neutral luxury in a modern plan.
7. Orient before you finalize. Long axis east–west, primary glazing south with overhang, garage and utility on the west wall to buffer afternoon heat. Free at the drawing stage in North Alabama, expensive forever if you get it wrong.
8. Spend the ceiling budget on one or two rooms. Ten‑foot main‑floor ceilings throughout plus one genuinely vaulted space reads far more expensive than uniform nine‑foot everywhere — and the most‑purchased plan in America specifies exactly that.
9. Design storage like you mean it. Garage storage, a walk‑in pantry and a real laundry room all clear 80% on the wanted list. All three are cheap in plan and nearly impossible to retrofit.
10. Buy CAD if you are modifying anything structural. The few hundred dollars extra saves your designer or engineer from redrawing the base file, which costs many multiples of that.

The plan you should want is the one your family recognizes as theirs and a stranger can read in ninety seconds. Those are not opposites — but you only get both on purpose.

Questions we get

Frequently asked questions

The last word

A house plan is the only purchase in this process where the cheapest option and the best option are frequently the same thing.

A $1,200 stock plan, modified thoughtfully by someone who has stood on your lot, beats a $150,000 custom set that nobody stress‑tested against the market. And a $150,000 custom set is worth every dollar when the site is difficult, the program is genuinely unusual, or the architecture is the reason you are building at all. The mistake is not picking one. The mistake is not knowing which situation you are in.

Get the three columns written down. Run the cost‑to‑build report. Tape the primary suite out on the garage floor. Ask somebody who sells houses what they would change. Then build the house you actually want.

Have us review your plan Call or text (256) 361-5593

Sources

• Buyer preferences — NAHB What Home Buyers Really Want, 2024 edition and the 2021 special study (PDF)
• Home size — NAHB, March 2026 · NAHB, February 2025
• One-story share by division — NAHB analysis of the Census Survey of Construction, July 2026
• Bedrooms, bathrooms, garages — bedrooms · bathrooms · garages · two-story foyers
• Open concept — Homes.com / YouGov, May 2025 · NAR · Pro Remodeler on the AIA panel
• Plan sales and trends — Architectural Designs 100 Most Popular · Houseplans.com 2026 trends
• Plan and architect costs — HomeGuide blueprint costs · Letter Four on architect fees · plan modification guide
• Alabama law — Ala. Code § 34-2-32 · Ala. Admin. Code ch. 100-X-4 · Stoneridge Homes v. Alabama Board (2019) · Alabama Board for Registration of Architects
• Permitting — Madison County residential requirements · City of Huntsville permits · Alabama Home Builders Licensure Board

This article is general information about the Huntsville-area real estate market, not legal, architectural, engineering or investment advice. Ben Nemec is a licensed Alabama real estate professional, not an attorney, architect or engineer. Plan prices, marketplace policies, rankings and code adoptions change constantly; every figure that matters to your project should be confirmed with the relevant company, department or licensed professional before you rely on it. Team Nemec has no financial relationship with any plan marketplace, designer or firm named in this article. Equal Housing Opportunity.