Statutory Diligence GuideUpdated October 2026Follow on Google★

Free Class MA Permitted Development Calculator Online UK

Statutory Source: GPDO 2015 (as amended) Class MA Commercial-to-Residential Regulations

Quick Answer: Free Class MA Permitted Development Calculator Online UK

Our free online Class MA Permitted Development Calculator models commercial-to-residential conversion feasibility across England. Enter your commercial building's gross internal floor area, select proposed flat configurations (studios, 1-bed, 2-bed, 3-bed), and instantly verify statutory NDSS compliance. The calculator checks Article 4 Direction risks, calculates statutory council planning fees (£120 per home), computes Community Infrastructure Levy (CIL) exemptions, and outputs an official 1-page A4 certified planning diligence brief.

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How to Use the Interactive Class MA Calculator

Our interactive calculator models statutory algorithms under the Town and Country Planning (GPDO) (England) Order 2015 (as amended):

Step 1: Enter total existing commercial Class E Gross Internal Area (e.g. 850 m²).

Step 2: Allocate proposed unit mix (e.g. 6 × 1-bed flats, 4 × 2-bed flats).

Step 3: Review automatic NDSS compliance checks to ensure all proposed layouts satisfy minimum size limits.

Step 4: Check site constraints (Listed Building status, SSSI, Conservation Area, Article 4).

Step 5: Review computed council planning fees and download your certified 1-page A4 statutory brief with SHA-256 verification.

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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: Commercial-to-Residential Conversions

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 Class MA Permitted Development 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 GPDO 2015 (as amended) Class MA Commercial-to-Residential Regulations 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.