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

Rental Yield Calculator

Work out the gross yield, the net yield after running costs and the weeks it stands empty, and the cash-on-cash return on the deposit, fees, and refurbishment you actually paid

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