Real Estate & Construction

Paint and tile estimators, rental cashflow, DPE heating, and renovation ROI.

• French Rental Cash Flow Calculator (Net-Net, LMNP) – Enter rent, vacancy, charges, loan payment and LMNP tax regime to get the monthly cash flow after French tax.
• French Heating Power Calculator by Volume and DPE Rating – Enter floor area, ceiling height, DPE class (A to G) and climate to estimate the heating power needed in watts.
• French Carrez Law Calculator: Floor Area (loi Carrez) – Enter floor areas, balconies, cellars and parts under 1.80 m to get the Carrez surface of a French condo unit.
• Energy Renovation Payback Calculator with Grants – Enter the quote, grants and heating bill to find the year when your insulation or heat pump work pays for itself.
• US BRRRR Calculator: Refinance Cash-Out and PMI Removal – Buy, Rehab, Rent, Refinance, Repeat : calculate cash extracted on ARV refinance, net cashflow, and HPA 80% PMI removal.
• EU Energy Performance Certificate (DPE) Renovation Auditor – Evaluate thermal leak rental bans (G in 2025, F in 2028, E in 2034), calculate renovation subsidies and green property value gains.
• Property Transfer Tax in Europe: Notary Fees by Country – Compare real estate acquisition costs across France, Belgium, Spain, Italy, Germany, and Portugal for existing and new homes.
• EU Golden Visa & Tax Residency Regime Simulator – Compare investment thresholds, special expat tax regimes (Beckham Law, NHR 2.0, €300k Flat Tax), and citizenship timelines in Spain, Portugal, Greece, Italy, and France.
• US Mortgage Refinance Breakeven & Discount Points Optimizer – Calculate your exact breakeven horizon in months, model discount point buydowns, and project net savings over 5, 10, and 30 years.
• US Cost Segregation Calculator with Bonus Depreciation – Accelerate depreciation on commercial and residential rental properties into 5-year and 15-year buckets for immediate cashflow deductions.
• Real Estate Cap Rate, DSCR & Cash-on-Cash Return Calculator – Analyze investment property profitability: Net Operating Income (NOI), bank DSCR coverage ratio, cash flow, and 5-year equity build-up.
• Airbnb vs Long-Term Rental Calculator: Yield and Cash Flow – Compare short-term vacation rental yield against long-term leases accounting for occupancy, cleaning fees, concierge commissions, and taxes.
• Property Capital Gains Tax Calculator for France – Calculate net taxable property capital gains, progressive holding duration allowances, and total tax liability.
• Mortgage Refinance Calculator: Break-Even and Total Savings – Determine if refinancing your home mortgage saves money by calculating break-even months, monthly savings, and total interest reduction.
• US Closing Cost Calculator: Home Buyer and Seller Fees – Estimate buyer and seller closing costs, loan origination fees, title insurance, escrow reserves, and state transfer taxes.
• Home Remodel ROI Calculator: Renovation Cost Recouped – Calculate return on investment and cost recouped at resale for kitchens, bathrooms, decks, roof replacements, and heat pumps.
• LMNP Real vs Micro-BIC Furnished Rental Tax Simulator – Compare the 50% flat allowance against the Real Simplified Regime with accounting depreciation to eliminate rental income taxes.
• City Center vs Suburbs Rent & Commute Calculator – Calculate the true net trade-off between downtown high rent vs suburban commuting costs, fuel, tolls, and lost travel time.
• Concrete Mix Calculator: Cement Bags, Sand & Gravel – Work out how many cement bags, how much sand, gravel and water a concrete slab or mortar needs, with a waste margin and the mix in kg/m³.
• Decking Joist Spacing Calculator: Span, Overhang, Boards – Find the maximum deck joist spacing, joist span and overhang (2021 IRC), then the boards, joists, pedestals and screws for a wood or composite deck.
• Slope Calculator: Percent, Degrees & Ratio Converter – Convert a slope between percent, degrees, 1:n ratio and x:12 pitch, or find it from a rise and run or two points. Roof, drain and ramp benchmarks.
• Stair Calculator: Blondel’s Rule, Riser & Tread Size – Find the number of steps, riser height, tread depth and run of your staircase, with a Blondel’s rule check (2h + g = 60 to 64 cm).
• Natural hazards in France by address: Géorisques lookup – Enter a French address to see listed hazards, seismic zone, clay shrink-swell exposure, radon category and natural disaster orders from Géorisques.
• French cadastral parcel lookup by address: number and area – Find the cadastral reference of a French address: section, parcel number, recorded area in m², municipality and outline, from IGN cadastre data.
• UK Stamp Duty Calculator 2026: SDLT for England and NI – Work out UK stamp duty (SDLT) on a home in England or Northern Ireland: first-time buyer relief, 5% second home surcharge, 2% non-resident rate.
• Community fees calculator Spain: share by quota (cuota) – Split a community of owners' budget in Spain by each unit's participation quota: monthly, quarterly and yearly fees, derrama and reserve fund.
• Drywall calculator: sheets, screws, tape and joint compound – Estimate drywall for walls and ceilings with openings: 4x8, 4x10 or 4x12 sheets with waste, screws, joint tape length, joint compound and a sheet layout.