home improvement
Home Addition Costs in 2026: Complete Breakdown
How much does a home addition cost in 2026? Detailed breakdown by addition type, region, and quality, with real numbers and a free calculator.
Open the sheetSheet B-00 · Field Guide IndexRev 04.2026
Editorial Portfolio · 10 Sheets on File
Field guides from the drafting table.
Cost breakdowns, permit playbooks, and addition-by-addition studies, each one drafted with numbers we'd actually hand a client. No fluff. No clickbait. Just the sheet you'd pull from the binder.
A10 drafted guides
BNAHB & HomeAdvisor data
CRevised quarterly
Index · Filter by category:home improvement
§ Portfolio Index, 09 more sheets
Room Addition vs Second Story: Which Is Worth It?
Room addition or second story? Compare costs, disruption, ROI, and when each makes sense. Real numbers for a 400 sqft project in 2…
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How Much Does a Bathroom Addition Cost? (2026)
Bathroom addition costs range from $28,000 to $120,000+ in 2026. See real breakdowns by size, quality, and location, and what driv…
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Home Addition Permits: What You Need and Costs
Home addition permits cost $500–$2,500 and take 1–8 weeks to approve. Learn what permits are required, what inspections to expect,…
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Sunroom Addition Cost Guide: 3-Season vs 4-Season
Sunroom additions cost $15,000–$80,000 depending on the type. Compare screened porches, three-season rooms, and four-season rooms …
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Home Addition ROI: Which Additions Add Most Value?
Home additions recoup 45–65% of their cost at resale on average. See which addition types provide the best ROI, and when the math …
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7 Costly Home Addition Mistakes to Avoid in 2026
These 7 home addition mistakes cost homeowners thousands. From skipping permits to hiring unlicensed contractors, learn what to av…
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DIY vs Contractor for Home Additions: Real Costs
DIY home additions can save 30–40% on labor, but come with permit, structural, and quality risks most homeowners underestimate. He…
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Kitchen Addition Cost: What to Budget in 2026
Kitchen additions cost $45,000–$150,000+ in 2026 depending on size and quality. See the full cost breakdown, what drives prices up…
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How to Finance a Home Addition: Loans and HELOCs
The best way to finance a home addition depends on your equity, project size, and timeline. Compare HELOCs, home equity loans, cas…
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