Home Addition Cost per Square Foot in 2026
Compare 2026 home addition cost-per-square-foot planning ranges for bedrooms, bathrooms, kitchens, sunrooms, garages and second stories.
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Independent home addition cost and planning guides.
Sunroom Addition Cost in 2026
Compare sunroom addition costs and see how glazing, insulation, HVAC, foundation and three-season versus four-season use affect the budget.
Read article →Garage Addition Cost in 2026
Estimate attached garage addition costs by size and understand foundation, driveway, garage-door, fire-separation and electrical cost drivers.
Read article →Kitchen Addition Cost in 2026
Plan a kitchen addition or extension with cost ranges for structure, cabinets, appliances, plumbing, electrical work, permits and contingency.
Read article →Bathroom Addition Cost in 2026
Estimate bathroom addition costs with planning ranges for plumbing, waterproofing, fixtures, ventilation, permits and contingency.
Read article →Bedroom Addition Cost in 2026
Estimate bedroom addition costs by square footage and see a worked 300 sq ft example, cost drivers, quote checklist and planning assumptions.
Read article →Second-Story Addition Costs: What Drives the Budget?
See what drives second-story addition costs, including engineering, roof removal, stairs, structural reinforcement and temporary living expenses.
Read article →Home Addition Permits, Engineering & Planning Costs
Prepare for a home addition permit with a free 15-step checklist and CSV worksheet. Review plans, zoning, local fees, inspections and contractor scope.
Read article →How Much Does a Home Addition Cost in 2026?
Understand 2026 home addition costs, price-per-square-foot ranges, hidden budget items and a 400-sq-ft example before requesting contractor bids.
Read article →How to Compare Home Addition Contractor Quotes
Compare home addition contractor quotes, uncover exclusions, and generate a free written bid request with a downloadable CSV checklist.
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