Is Building a House Cheaper Than Buying? Here's the Real Math

What Building a House Actually Costs in 2026

Construction costs are not the whole bill. NAHB's 2024 Cost of Construction Survey found that construction costs make up 64.4% of a new home's final sales price. The finished lot adds another 13.7%. Builder profit runs 11.0%. Overhead and general expenses take 5.7%. Sales commission, financing, and marketing account for the rest. Add it up and the number a builder first quotes you, the per-square-foot construction cost, is usually only about two-thirds of what you'll actually pay to close.

Per-square-foot pricing backs this up. NAHB's regional data puts the South Atlantic division, which includes Florida, at $147 per square foot for spec-built homes, and that figure excludes the lot entirely. Custom, contractor-built homes run higher nationally at $166 per square foot. Neither number includes permits, site prep, or the interest paid on a construction loan while the house gets built. A 2,200-square-foot custom home at $166 a foot runs $365,200 in construction cost alone, before land, before overhead, before profit margin.

Time adds its own cost. Census Bureau data shows single-family homes averaged 9.1 months from authorization to completion in 2024, split between 1.4 months to get permitted and 7.6 months of actual construction. Spec homes built for sale moved fastest at 7.6 months. Custom and owner-built homes ran 15.1 months. Every one of those months is a month of rent, a mortgage on your current place, or a construction loan racking up interest before you've moved a single box.

What Buying an Existing Home Costs Instead

Buying beats building on certainty, even if it doesn't always win on price. The national median price for an existing home was $440,600 in June 2026, according to the National Association of Realtors. That number already includes a finished lot, permits, landscaping, and everything else a new build has to add on top of its construction quote. A typical existing-home purchase closes in 30 to 45 days once you're under contract, not the 9.1 months Census data shows for a new build.

Buying existing has its own costs. Expect a down payment, closing costs of roughly 2% to 5% of the purchase price, an inspection, and very likely a repair negotiation once that inspection turns something up. An appraisal that comes in under contract price can force a renegotiation or kill the deal outright. None of that is unique to Florida. It's the standard friction of a traditional listing on either side of a transaction.

Cash Flow Deals is a Florida real estate investor that locks in a net price for a seller's house before repairs are scoped, using a novation-based, flat-fee process arranged through its licensed FL brokerage partner, Silver Door Realty — not a traditional listing, and not a brokerage itself.

If you already own a house and you're weighing whether to build new or buy something else, the math only works once you know what your current house is actually worth to sell today. A locked number changes the decision. It tells you your real budget before you sign a construction contract or make an offer on another property.

The Cash Flow Deals Three-Step Path to a Locked Number

Here's how the process works in three steps.

1. Cash Flow Deals evaluates your current house and locks a net price before any repairs are scoped, so you have a real number while you're still weighing whether to build or buy next.

2. You pick the timeline. Close in as little as 10 business days through a novation-based process, or take more time if you need to line up a builder, a lot, or your next house first.

3. You walk away with a fixed number, no listing commission, no repair negotiation, and no construction bill stacked on top of a mortgage payoff.

The one exception: if something structural surfaces that was not visible or disclosed before we signed — foundation issues, hidden moisture, old wiring, cast-iron drain failure — we re-cost it and bring the number back to you. You decide. You can walk away. We disclose what we know at offer time so this almost never happens.

The 35.6% gap is the reason a locked number matters more than a rough estimate. NAHB's data shows construction cost alone is only 64.4% of a new build's final price. Land, profit, and overhead make up the other 35.6%. A seller who locks in a net price on their current house before repairs get scoped is working from a real number on day one. That's a fixed budget, not a guess that changes after inspection, appraisal, or a construction overrun.