Home Addition Cost: What to Budget in 2026

Home addition cost runs $80 to $500 per square foot in 2026, with the average project landing between $55,000 and $95,000 all-in (HomeGuide, Home Addition Cost, 2026). A standard 20-by-20 room addition typically costs around $118,000 once you include design, permits, and a contingency. The biggest swing factor isn’t finishes — it’s whether you build out or build up.

Here’s what a home addition really costs, how the numbers break down, and where an addition pays back.

What Is the Average Home Addition Cost in 2026?

The average home addition cost in 2026 is $100 to $400 per square foot, with most homeowners paying $125 to $250 for a standard room addition (Angi, Home Addition Cost, 2026). For a 400 square foot room at mid-range finishes, that works out to roughly $71,500 to $191,000 all-in, with most landing near $118,000.

That all-in figure matters: it includes not just construction but design, permits, and contingency — the line items that first-timers forget and that turn a “$60,000 addition” into a six-figure project.

Build Out or Build Up? The Biggest Cost Factor

The single biggest driver of home addition cost is direction. Building out on the ground floor runs $80 to $200 per square foot, while building up a second story runs $300 to $500 — because building up means reinforcing the structure below, adding stairs, and often upgrading systems.

• Build out (ground floor): $80-$200/sq ft — usually cheaper, but you lose yard space and need available lot.
• Build up (second story): $300-$500/sq ft — keeps your footprint but requires structural reinforcement and stairs.
• Bump-out (small extension): the budget option for a few extra feet of kitchen or bath.

Our take: if you have the lot for it, building out is almost always the better value. Building up looks efficient but the hidden structural work underneath is where the budget goes.

Labor now represents 40 to 50 percent of an addition budget, up from 35 to 40 percent five years ago, so it’s a bigger share than it used to be. An addition is essentially building a small house, so it stacks onto your overall cost to remodel a house.

Does a Home Addition Pay Off?

Most home additions return about 60 to 70 percent of their cost at resale, with curb-appeal and living-space additions performing best. That’s a solid but not full return, so the math works best when you’ll actually use the space for years, not just flip it.

Additions make the most sense when they solve a real need — a growing family, a home office, an in-law suite — and when the finished home still fits its neighborhood. Over-building for the block is the fastest way to lose money on an addition.

Home Addition Cost in Fort Lauderdale

In Fort Lauderdale and across Broward, additions sit at or above national rates, and they always require permits and inspections because you’re changing the structure and footprint. Coastal wind-load codes and older foundations can add engineering steps, so a local contractor who knows Broward’s requirements is worth the vetting.

NJL General Services has built additions across Broward for 15+ years. We’ll give you an itemized estimate that includes design, permits, and a realistic contingency — no lowball number that balloons halfway through.

Frequently Asked Questions

How much does a home addition cost in 2026?

Home additions cost $80 to $500 per square foot, averaging $55,000 to $95,000 total. A standard 400 square foot room addition typically runs $71,500 to $191,000 all-in, including design, permits, and contingency, with most near $118,000.

Is it cheaper to build up or build out?

Building out is usually cheaper at $80 to $200 per square foot, versus $300 to $500 to build up. Building up avoids using yard space but requires structural reinforcement, stairs, and often systems upgrades, which drive the higher cost.

Do home additions add value?

Yes, typically 60 to 70 percent ROI, with living space and curb-appeal additions performing best. The return is strongest when the addition meets a real need and keeps the home in line with its neighborhood rather than over-building.

Do you need a permit for a home addition?

Always. An addition changes the structure and footprint, so it requires permits, inspections, and often engineering, especially in coastal areas like Broward with wind-load codes. Budget the permit and inspection timeline into your plan.

The Bottom Line on Home Addition Cost

Home addition cost in 2026 runs $80 to $500 per square foot, with a typical room addition near $118,000 all-in. Whether you build out or up is the biggest lever, followed by finishes and your local code requirements. Expect a 60 to 70 percent return, best when the space meets a genuine need.

Get an all-in estimate that includes design, permits, and contingency — not just construction. When you’re ready to plan yours, general contractor fort lauderdale starts with a free consultation.