Ask a builder what a custom home costs and you will hear a number per square foot. We treat that number as where the conversation starts, not where it ends. Two houses of the same size, on the same footprint, can land a million dollars apart, and none of that gap shows up in the square footage. It shows up in the window package, the mechanical systems, the roof, and the finishes. Here is where the money on a custom home actually goes.
You can have a 150,000 dollar window package, or a half million, or a million. And there are different quality levels inside of that.
Where a custom home separates from a spec home
The two biggest line items, both on the same dollar scale, from a speculative build to a custom one. Ranges Scott Hobbs gives; illustrative, the real figure depends on the project.
The window is the same size. The difference is whether you feel it
On the speculative side, you build for a mass market, so you choose the less expensive window and appeal to the most buyers. On a custom home, we hand a client a truly expensive window and watch what they do.
Some walk over and feel the weight of it, look at the joinery, see how the pieces come together. As Scott Hobbs describes it, that is the person who should have the expensive window, because they will notice it every day. Someone else glances at the same window and says it looks nice outside. They can save hundreds of thousands of dollars and never miss the difference. The window is the same size. What you are paying for is whether you feel it.
The mechanical systems are the biggest custom difference
Where custom money really goes is not the marble. It is heating, ventilation, and air conditioning. On a speculative house, that package might be 100,000 dollars with four or five zones. On the custom side of the same house, it can be half a million dollars with thirteen or fourteen zones, a great deal of radiant heat, and variable-speed air handlers.
The point is comfort you stop noticing. In Scott Hobbs’s words, when a custom system kicks on you do not get a poof of air on the back of your neck. It ramps up, it ramps down, it anticipates, and it makes the whole space quieter and steadier to live in.
From speculative to fully custom
Windows and mechanical systems only, using the ranges Scott Hobbs gives. The climb steepens near the top on purpose: the jump from 95 to 96 percent quality can cost 50 percent more. Illustrative.
Buy good design first
For all the talk of windows and mechanicals, one decision sits above the rest: buy good design first. The reasoning is plain. The cost of good design over poor design is not that different. The difference in the finished house is enormous.
The architect Robert Cardello, who has worked with Hobbs on custom homes for two decades, puts the same idea another way. A great house, he says, comes down to “a million little things.” The round tower on a waterfront home is there because the sea wall wraps that corner and frames the view. Good design is the sum of decisions like that, made early.
You are going to spend the money either way. Spend it on design that turns the same budget into something worth building. That is the decision that makes every line item after it worthwhile, and it is why we price a home as it is drawn, not after.
The difference between spending that money on good design and spending it on poor design, the overall cost is not tremendously different. But the difference in the end result is huge.
A spec home and a custom home, side by side
| System | Speculative | Custom |
|---|---|---|
| Window package | Around 150,000 | Up to a million, better glass and joinery |
| Mechanical systems | ~100,000, 4 to 5 zones | ~500,000, 13 to 14 zones, radiant |
| Roof shingles | Thinner, wear sooner | Thicker, made to last |
| Decorative finishes | Standard | 100 to 300 per sq ft added |
| Recessed lighting | About 100 each | Up to 1,500 each |
Illustrative ranges. The real figure depends on the project.
A square-foot number is a range. A real number is a document
This is why we are wary of a price per square foot. It gives you a range, and a useful one, but it is not a real number. A real number comes from a forty to fifty page, line-item estimate that prices every trim item, all the tile and marble, the millwork, down to each individual part.
We get there by drawing a little, pricing it, drawing more, then pricing again, so by the time you are ready to build there is very little left to surprise you. Honesty about the budget early is the whole point.
Custom home cost, in brief
- What drives the cost of a custom home?
- The window package, the mechanical systems, the roof, and the finishes, far more than the square footage. Scott Hobbs prices a window package anywhere from 150,000 dollars to a million, and an HVAC system from four or five zones to thirteen or fourteen with radiant heat. Those choices, not the floor area, set the number. See how we work.
- How much does a custom home cost per square foot?
- Per square foot is a useful range, not a real number. Two homes of the same size can land a million dollars apart on windows, mechanicals, and finishes alone. A real figure comes from a full line-item estimate. More on that in how we work.
- Where does Hobbs build custom homes?
- Hobbs builds custom homes across the Hamptons, New York City, New Jersey, and the Fairfield County and Litchfield County area of Connecticut. See our work.
- How does Hobbs handle the budget?
- Hobbs prices as it draws: a preliminary budget early, a price check at each stage, then a forty to fifty page line-item estimate before the build. The goal is no surprises. When you are ready, start a conversation.
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To hear Scott Hobbs talk this through in his own words, watch the full conversation on Boroughs & Burbs.