UK Property & Land Calculators
Stamp Duty Land Tax, Section 24 landlord tax, permitted development volume, HMO cash-on-cash, commercial SDLT, London plot ratio and acres-to-hectares fencing calculators.
- SDLT Top Tier
- 12.0%
- Above £1.5m
- Additional Dwelling
- +5.0%
- Surcharge
- Section 24 Credit
- 20%
- Finance cost relief
Localized Calculators
Every UK calculator in the ParcelSizer registry, each running entirely in your browser with the jurisdiction's currency, units and statutory rules.
- Stamp Duty Land Tax (SDLT) CalculatorCalculate Stamp Duty Land Tax on a UK residential purchase across the standard tiers, first-time buyer relief and the additional dwelling surcharge.
- UK Buy-to-Let Rental Yield CalculatorCalculate gross and net rental yield on a UK buy-to-let property after mortgage interest, management, maintenance and void periods.
- UK Section 24 Landlord Tax CalculatorCompare pre-Section 24 full interest relief against the current 20% tax credit and see the effective tax rate on your rental profit.
- Permitted Development Volume CalculatorCheck whether a rear extension or loft conversion falls within permitted development volume and height limits, or needs full planning permission.
- UK HMO Cash-on-Cash Return CalculatorMeasure the cash-on-cash return of a UK house in multiple occupation after licensing, utilities, management and mortgage costs.
- Commercial SDLT CalculatorCalculate Stamp Duty Land Tax on a UK commercial or mixed-use property, including the 5% non-residential surcharge above £250,000.
- London Plot Ratio & Site Coverage CalculatorCheck London plot ratio and site coverage against the London Plan density matrix and local borough design policies.
- Acres to Hectares & Fencing CalculatorConvert acres to hectares and square metres, and calculate perimeter fencing quantities for UK land parcels.
Statutory Tax Cheat-Sheet
The transfer-tax, stamp-duty or equivalent tiers and rates that apply in UK, as published in the current schedule.
Regional Benchmark Reference
| Jurisdiction / Tier | Rate or Limit | Statutory Note |
|---|---|---|
| £0–£125k | 0% | Nil rate |
| £125k–£250k | 2% | Basic |
| £250k–£925k | 5% | Standard |
| £925k–£1.5m | 10% | Higher |
| Above £1.5m | 12% | Top |
Formula & Statutory Rule
sdlt = tiered(price, [0, 2%, 5%, 10%, 12%])additional_dwelling_surcharge = price × 5%; section_24_credit = interest × 20%Frequently Asked Questions
When is SDLT payable?
SDLT is due within 14 days of completion on most residential and commercial purchases in England and Northern Ireland.
What is the additional dwelling surcharge?
An extra 5% SDLT applies to purchases of additional residential property above a buyer's main home.
How does Section 24 work?
Since 2020, landlords cannot deduct mortgage interest from rental profit; instead they receive a 20% tax credit on finance costs.
What is permitted development?
Permitted development rights allow certain extensions and changes of use without a full planning application, within volume and height limits.