THE BIG HOUSES

Real Estate & Home Calculators

Free, practical tools for buyers, owners, and remodelers β€” size up a mortgage payment, estimate property tax, budget a renovation, measure a room, ballpark your insurance, and gauge a home's value.

Mortgage Calculator

Estimate your full monthly payment from home price, down payment, rate, and term β€” principal and interest plus property tax and insurance, with total interest and total of payments

Property Tax Calculator

Turn an assessed value into annual and monthly property tax using a mill rate or a percentage, subtract exemptions, and see the effective rate on your home

Renovation Cost Estimator

Budget a kitchen, bath, basement, addition, or whole-home remodel from area and quality tier, with a per-square-foot rate, subtotal, contingency buffer, and total cost

Room Size Calculator

Find a room's floor area, wall area, and volume from length, width, and ceiling height β€” plus the flooring boxes and paint gallons you'll need to buy

Home Insurance Calculator

Get a rough homeowners-insurance premium from rebuild value, location risk, deductible, and personal-property coverage β€” annual and monthly figures for budgeting

Home Value Estimator

Estimate a home's worth with a price-per-square-foot comp method, adjust for lot and condition, and see a likely value range β€” a quick read, not an appraisal

Smart Home Integration Calculator

Price a connected-home build from bulbs, plugs, cameras, thermostats, and a doorbell β€” with a hub, installation, total cost, and an estimated monthly camera-cloud fee

Luxury Property Tax Calculator

Estimate annual and monthly property tax on a high-value home with an optional luxury or mansion surcharge, exemptions, and the effective rate broken out

Pool Cost Calculator

Estimate the installed cost of a pool by type and area, add a heater and lighting, and see annual maintenance plus a projected ten-year total of ownership

Mansion Mortgage Calculator

Estimate a luxury or jumbo mortgage payment from price, down payment, rate, term, tax, insurance, and HOA β€” with total interest and your down-payment percentage

Luxury Real Estate Valuation

Value a luxury home with a price-per-square-foot method, add lot value and amenities, adjust for condition, and see an estimated value with a likely range

Luxury Home ROI Calculator

Combine rental cash flow with compounding appreciation to estimate total return, ROI on the cash invested, and the cap rate on a luxury investment property

Luxury Amenities Checklist

Generate a categorized amenities checklist β€” wellness, entertainment, technology, and outdoor β€” scaled to your budget tier and property type

Landscaping Cost Estimator

Estimate landscaping cost from area, project type, and quality tier β€” lawn, garden, hardscape, or full design β€” with a per-square-foot rate, design fee, and total

Home Security Planner

Get a recommended count of cameras and door, window, and motion sensors from your home's layout, with an estimated hardware cost including a hub

Historic Mansion Restoration Estimator

Estimate the cost to restore a historic mansion from its area, condition, and scope of work, with a per-square-foot rate, a 20% contingency, and a total

Estate Maintenance Scheduler

Build an annual maintenance schedule for a large home or estate, switching pool and grounds tasks on by feature, with each task's cost and a total yearly budget

Energy Efficiency Analyzer

Estimate the bill savings from insulation, solar, windows, and HVAC upgrades, with your savings percentage, annual savings, upgrade cost, and a simple payback period