Statutory Diligence GuideUpdated October 2026Follow on Google★

Free Online EPC Calculator: Estimate SAP Points and Rating Uplifts

Statutory Source: Standard Assessment Procedure (SAP) Tables & MHCLG Guidelines

Quick Answer: Free Online EPC Calculator: Estimate SAP Points and Rating Uplifts

You can estimate your home's energy performance rating for free using our interactive SAP points calculator. Simply select your current EPC band (Band D, E, or F), property typology, and wall construction to see instant real-time SAP point gains, annual energy bill savings, and estimated installation costs for 8 statutory retrofit measures without paying for an assessment. The calculator displays your journey towards the 69-point Band C threshold and flags whether your property is eligible for statutory grant funding.

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How to Calculate Your SAP Gap in 3 Simple Steps

Step 1: Identify Your Current Score. Look at the top right of your existing EPC. A property with a score of 52 is Band E and requires exactly 17 SAP points to achieve Band C (69 points).

Step 2: Model Fabric Interventions. Test cavity wall insulation (+9 pts) and loft top-up (+5 pts). Combined, these two fabric upgrades deliver 14 points, bringing the score to 66.

Step 3: Select the Final Low-Cost Measure. Adding thermostatic radiator valves (+3 pts) pushes the score to 69, securing Band C compliance for under £2,500 total expenditure.

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Instant 3-Second Statutory Screening

Check Any Property Across 12 Official Statutory Registers

Conducting property due diligence requires cross-referencing multiple public registries. Run a free instant desktop screening across Environment Agency flood models, British Geological Survey subsidence data, UKHSA radon maps, HM Land Registry sold prices, and local planning constraints.

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Environment Agency FloodingSurface water, rivers & sea risk bands

BGS Ground StabilityShrink-swell clay & subsidence risk

UKHSA Radon Gas PotentialOfficial radon class & protection rules

HM Land Registry PricesHistorical transactions & tenure type

EPC Energy & RdSAP SpecsOfficial construction era & wall fabric

Planning Applications BufferRecent nearby planning notices (500m)

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Official Primary Verification Registers

Cross-reference property diligence across verified UK government open registers under the Open Government Licence v3.0:

Category: EPC Band C & Energy Efficiency

Property Age & RdSAP Era

Official construction age bands, wall specifications, and earliest conveyance dates.

MHCLG Energy ActOpen Tool

Council Tax & Precepts

Statutory Band A–H ratios, police/fire levies, and 1 April 1991 baseline thresholds.

Local Govt Finance Act 1992Open Tool

Public Rights of Way (PRoW)

Conclusive legal proof of footpaths, bridleways, and restricted byways on land.

Wildlife & Countryside Act 1981Open Tool

Planning & Consultations

Live planning applications, 21-day neighbor notices, and permitted development appeals.

Town & Country Planning Act 1990Open Tool

Flood Risk & Surface Water

Statutory Flood Zones 1, 2, 3, 30/100/1000-year pluvial models, and Flood Re rules.

Flood & Water Mgt Act 2010Open Tool

Land Registry Sold Prices

Verified historical completion prices, title deed values, and regional ONS house price indices.

Land Registration Act 2002Open Tool

Stamp Duty (SDLT)

Exact progressive residential thresholds, £300k FTB relief, and 5% additional home surcharges.

Finance Act Statutory ScheduleOpen Tool

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Inspect Any UK Property on Our EPC Band C 2030 Landlord Cost Calculator

Run an instant preliminary screening across official government databases including the MHCLG EPC register, HM Land Registry, and Environment Agency records.

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Official Statutory Notice & Guidance:

This guide is compiled for informational due diligence referencing official statutory records from Standard Assessment Procedure (SAP) Tables & MHCLG Guidelines under the Open Government Licence v3.0. Legal titles and physical structural condition should always be independently inspected by a qualified conveyancing solicitor and chartered RICS surveyor prior to legally binding property commitments.