Home Addition Cost Calculator
Get an instant, accurate estimate for your home addition project in under 2 minutes
What type of addition are you planning?
Select the option that best describes your project
How big will your addition be?
Drag the slider or enter the square footage below
What finish level do you prefer?
This significantly impacts your final investment
- Laminate countertops & flooring
- Basic fixtures and hardware
- Standard paint finishes
- Stock cabinets and trim
- Hardwood or quality LVP flooring
- Quartz or granite counters
- Semi-custom cabinets
- Quality fixtures throughout
- Premium hardwood flooring
- Designer fixtures and hardware
- Custom cabinetry
- Upgraded insulation & windows
- Exotic hardwoods & natural stone
- Smart home integration
- Fully custom everything
- Architectural details & millwork
Any special features to include?
Select all that apply to your project
When are you looking to start?
This helps us understand your timeline and provide accurate scheduling estimates
We serve all of Southeast Michigan
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*Monthly payment estimate based on 7.5% HELOC rate over 15 years. Actual rates vary. This calculator provides estimates only; actual costs depend on site conditions, design, and materials.
Home addition cost calculator
Planning your Southeast Michigan home addition starts with understanding potential investment ranges. While every project has unique requirements, Wright's Renovations helps homeowners estimate costs using proven calculation methods based on hundreds of completed additions throughout Oakland, Washtenaw, and Wayne counties. This guide provides realistic cost expectations for various addition types and sizes.
Basic cost calculation method
Southeast Michigan addition costs typically range from $200 to $400 per square foot depending on complexity and finish level. Budget-friendly additions with standard finishes average $200-$250 per square foot while luxury additions with premium materials reach $350-$400 per square foot. Mid-range additions balancing quality and value typically invest $275-$325 per square foot including all labor, materials, and permits.
Calculate basic addition costs by multiplying desired square footage by appropriate per-square-foot rate. A 300-square-foot master suite addition with quality finishes calculates to $82,500-$97,500 (300 sq ft × $275-$325). A 200-square-foot bedroom addition with standard finishes estimates $40,000-$50,000 (200 sq ft × $200-$250).
Factors affecting final costs
Foundation type significantly impacts costs with full basements adding $15,000-$25,000, crawl spaces adding $8,000-$12,000, and slab foundations representing the most economical option. Second-story additions eliminate foundation costs but require structural engineering ensuring existing construction supports additional weight. Wright's Renovations evaluates your home's capacity providing accurate structural assessments.
Bathroom and kitchen additions cost substantially more per square foot due to plumbing, electrical, and appliance requirements. Bathroom additions average $300-$450 per square foot while kitchen additions range from $350-$500 per square foot depending on appliance and cabinetry selections.
Michigan-specific cost considerations
Southeast Michigan's climate requires proper insulation and weatherproofing adding $3,000-$8,000 to projects but essential for comfort and energy efficiency. Winter construction may incur weather protection costs ensuring quality work continues year-round. Wright's Renovations plans projects strategically minimizing weather-related delays and expenses.
Permit fees vary significantly across Southeast Michigan municipalities from $500 in smaller townships to $2,500 in larger cities. Design and engineering fees typically add 8-12% to total project costs. Wright's Renovations includes all costs in comprehensive estimates eliminating surprise expenses during construction.
Get personalized cost estimates for your specific addition. Schedule your consultation for detailed pricing tailored to your Southeast Michigan home and goals.