Cardiff EPCs
Based in Cardiff, Wales · Covers Cardiff and the Vale of Glamorgan Accreditation stated by provider: Elmhurst, ECMKOwn website
02 · Building Regulations · Part L
SAP calculations in Wales
57 providers offering SAP calculations in or across Wales, including national firms. The rules in Wales differ from England’s, so see the notes below.
The rules in Wales
Every new home needs design-stage and as-built SAP under Wales’s own Part L. Wales uses SAP 10.2 today, with a Welsh compliance report (BRWL) instead of England’s BREL. From 4 March 2027, new Welsh rules move to SAP 10.3 and require on-site renewables, usually solar PV, on new homes.
57 SAP assessors for Wales
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Based in or covering Wales (3)
Fairwood Solutions
Based in Carmarthen, Carmarthenshire · Covers South and West Wales, and parts of South West England Accreditation stated by provider: Elmhurst EnergyOwn website
Melin Energy Consultants
Based in Swansea · Covers UK-wide (offices in Swansea, Bristol and London) Accreditation stated by provider: Elmhurst (Approved Psi Value Competency Scheme), BREEAM AP, CIBSE, UK Thermography AssociationOwn websiteUK-wide
National providers (check they cover your area) (54)
AES Sustainability Consultants
Based in Tiverton, Devon · Covers England, Scotland and Wales Accreditation stated by provider: ATTMA, SITMA, Elmhurst, ECMK, TrustMark, BREEAM, PassivhausOwn websiteUK-wide
Air Testing UK Ltd
Based in Manchester · Covers Nationwide Accreditation stated by provider: iATS, BINDT, BPEC, AECBOwn websiteUK-wide
Airtight Testing Staffordshire
Based in Stoke-on-Trent · Covers Staffordshire and UK-wide Accreditation stated by provider: ATTMAOwn websiteUK-wide
Apex Home and Energy Surveyors
Based in Warrington, Cheshire · Covers Warrington and WA postcodes for EPCs; calculation work across England and Wales Accreditation stated by provider: RICS, Elmhurst Energy, CHASOwn websiteUK-wide
APT Sound Testing (Air Pressure Testing Ltd)
Based in Upper Sundon, Bedfordshire · Covers Coventry, Warwickshire and UK-wide Accreditation stated by provider: UKAS accredited testing laboratory (No. 4340)Own websiteUK-wide
Assessment Hive
Based in Goffs Oak, Hertfordshire · Covers London and throughout the UK Accreditation not yet checkedOwn websiteUK-wide
ATSPACE
Based in Royston, Hertfordshire · Covers England and Wales Accreditation stated by provider: Elmhurst, NHER, SITMA, TrustMark, Passivhaus Trust (Patron), BPEC, BSRIA, Passivhaus Trust PatronOwn websiteUK-wide
Base Energy
Based in Staines-upon-Thames, Surrey and Bootle, Merseyside · Covers UK-wide, including London Accreditation stated by provider: Elmhurst, CIBSE, TrustMark, BREEAMOwn websiteUK-wide
Briary Energy
Based in Hatfield, Hertfordshire · Covers UK-wide Accreditation not yet checkedOwn websiteUK-wide
Build Energy
Based in UK (several offices) · Covers UK-wide Accreditation not yet checkedOwn websiteUK-wide
Building Energy Experts
Based in Bristol · Covers Nationwide Accreditation stated by provider: Elmhurst, ATTMA, TrustMark, Retrofit Academy (Corporate Member), Retrofit Academy Corporate Member, AECBOwn websiteUK-wide
Complete EPC
Based in Finchley, London · Covers All of London, and elsewhere in the UK Accreditation stated by provider: Quidos, StromaOwn websiteUK-wide
Compliance 4 Buildings
Based in Hornchurch, Essex · Covers Nationwide (UK) Accreditation stated by provider: ATTMAOwn websiteUK-wide
Coventry Property Certification
Based in Coventry, West Midlands · Covers England and Wales Accreditation not yet checkedOwn websiteUK-wide
DAA Group
Based in London · Covers Nationwide across the UK Accreditation stated by provider: ATTMA, BPECOwn websiteUK-wide
Designed 2 Comply
Based in Chorley, Lancashire · Covers Whole of the UK Accreditation stated by provider: OCDEAOwn websiteUK-wide
E2 Specialist Consultants
Based in Birmingham office (head office Wakefield) · Covers Birmingham and 25+ West Midlands towns Accreditation stated by provider: SITMA, iATSOwn websiteUK-wide
Easy EPC Ltd
Based in Brighton, East Sussex · Covers Nationwide, with local landing pages for many UK towns including Leicester, Nuneaton and Coventry Accreditation not yet checkedOwn websiteUK-wide
Elmstead Energy Assessments & Building Services (EEABS)
Based in Colchester, Essex · Covers UK-wide, including London Plan energy assessments Accreditation stated by provider: Elmhurst, CIBSE Low Carbon Consultant, CIBSE Low Carbon Energy Assessor, EDSL TASOwn websiteUK-wide
Energist
Based in Cirencester, Gloucestershire · Covers Nationwide Accreditation stated by provider: Elmhurst, ATTMA, ANCOwn websiteUK-wide
Energy & Design
Based in Cannock, Staffordshire · Covers England, Scotland and Wales Accreditation stated by provider: Scotland Section 6 Approved Certifier of Design, BREEAM UK New Construction (Residential)Own websiteUK-wide
Energy Counsel
Based in Manchester, Greater Manchester · Covers Manchester, the North West and nationwide Accreditation stated by provider: CIBSE, BPEC, iATS, SITMA, BREEAM, AECB, ConstructionlineOwn websiteUK-wide
Energy National
Based in Rochdale, Greater Manchester · Covers Greater Manchester and East Lancashire locally; SAP work nationwide Accreditation stated by provider: Elmhurst Energy, Stroma, ABBE, BRE, TrustMarkOwn websiteUK-wide
Energycount
Based in Poole, Dorset · Covers Nationwide (UK) Accreditation not yet checkedOwn websiteUK-wide
Energytest
Based in Tunbridge Wells, Kent · Covers London and the South East; nationwide Accreditation stated by provider: ATTMAOwn websiteUK-wide
EnergyWise Services
Based in Belfast, Northern Ireland · Covers UK-wide (remote delivery available) Accreditation not yet checkedOwn websiteUK-wide
enevo
Based in Birstall, West Yorkshire · Covers UK-wide (national network of local assessors) Accreditation stated by provider: ATTMA, iATS, SITMA, Elmhurst, Stroma Certification, BREEAM, ABBEOwn websiteUK-wide
Environmental Economics
Based in Luton, Bedfordshire · Covers UK nationwide, including London Plan work Accreditation stated by provider: Elmhurst (overheating scheme)Own websiteUK-wide
EPC Assess Ltd
Based in Midlands · Covers Birmingham, Wolverhampton, Coventry and UK-wide Accreditation not yet checkedOwn websiteUK-wide
EPC Experts
Based in Coventry, West Midlands · Covers Coventry, Nuneaton, Rugby, Warwick and nationwide Accreditation not yet checkedOwn websiteUK-wide
EPC National
Based in Heywood, Greater Manchester · Covers Nationwide Accreditation not yet checkedOwn websiteUK-wide
ERS Consultants
Based in Oxford · Covers UK residential and commercial developments Accreditation not yet checkedOwn websiteUK-wide
Fading Footprints Ltd
Based in Leeds, West Yorkshire · Covers Nationwide (UK) Accreditation not yet checkedOwn websiteUK-wide
Focus 360 Energy
Based in UK (several offices) · Covers Nationwide Accreditation stated by provider: Elmhurst, ECMK, StromaOwn websiteUK-wide
Gradwell Group
Based in Doncaster, South Yorkshire · Covers England-wide Accreditation not yet checkedOwn websiteUK-wide
HA Acoustics
Based in Harlow, Essex · Covers East Anglia, London, South West and nationwide Accreditation stated by provider: UKAS, iATSOwn websiteUK-wide
Manchester EPC Ltd
Based in Cheadle, Greater Manchester · Covers EPC visits within about 50 miles of Manchester; SAP and new-build work nationwide Accreditation not yet checkedOwn websiteUK-wide
MES Building Solutions
Based in Newark, Nottinghamshire · Covers Throughout the UK (offices in Newark, London and Birmingham) Accreditation stated by provider: ATTMA, Elmhurst, AECB, TrustMarkOwn websiteUK-wide
MSAFE
Based in Bournemouth, Dorset · Covers Nationwide Accreditation stated by provider: UKAS (sound insulation testing)Own websiteUK-wide
PB Sustainability
Based in Wirral, Merseyside · Covers Nationwide Accreditation stated by provider: ABBE, CABE, ElmhurstOwn websiteUK-wide
Purple Energy Solutions
Based in UK (several offices) · Covers Nationwide Accreditation stated by provider: ATTMA, UKASOwn websiteUK-wide
QuinnRoss Energy
Based in Sittingbourne, Kent · Covers UK-wide, with a focus on Greater London and the South East Accreditation stated by provider: Elmhurst, UKAS, BRE Global, CIBSE Low Carbon Consultant, Low Carbon Energy AssessorOwn websiteUK-wide
Ratio Seven
Based in Nantwich, Cheshire · Covers Nationwide including Birmingham and the West Midlands Accreditation not yet checkedOwn websiteUK-wide
sap2sbem
Based in Leek, Staffordshire · Covers UK-wide (desk-based) Accreditation stated by provider: ElmhurstOwn websiteUK-wide
SAPgen
Based in Warrington, Cheshire · Covers UK-wide Accreditation stated by provider: Elmhurst (OCDEA)Own websiteUK-wide
SAPs UK
Based in London · Covers UK-wide, including Scotland Accreditation stated by provider: Elmhurst (NHER)Own websiteUK-wide
SEES
Based in Durley, Southampton, Hampshire · Covers UK-wide Accreditation stated by provider: Elmhurst, ATTMA, BREEAM licensed assessor company, Stroma certifiedOwn websiteUK-wide
Shire Group BSC
Based in Birmingham · Covers Nationwide (UK) Accreditation stated by provider: CIBSE Low Carbon ConsultantOwn websiteUK-wide
Sound Solution Consultants
Based in Ipswich, Suffolk · Covers Nationwide Accreditation stated by provider: UKAS, IOAOwn websiteUK-wide
Southern Assessors
Based in Salisbury, Wiltshire · Covers UK-wide, with offices in London, Bristol and Birmingham Accreditation stated by provider: NHEROwn websiteUK-wide
Stroma Built Environment
Based in Wakefield, West Yorkshire · Covers UK-wide Accreditation stated by provider: UKAS (No. 2731), ATTMAOwn websiteUK-wide
UK Building Compliance
Based in Hinckley, Leicestershire · Covers UK-wide (England, Wales, Scotland and Northern Ireland) Accreditation stated by provider: ATTMA, Elmhurst, SITMA, BPEC, UKASOwn websiteUK-wide
Vision Energy & Sustainability
Based in Bollington, Cheshire · Covers UK-wide Accreditation not yet checkedOwn websiteUK-wide
SAP calculations in other regions
London (22) South East (12) East of England (12) South West (9) West Midlands (14) East Midlands (5) Yorkshire and the Humber (5) North West (15) Scotland (4) Northern Ireland (11)
Getting signed off in Wales
Building control in Wales works much like England. Your council or a registered building control approver checks the work and issues a completion or final certificate. Wales has its own Approved Documents, and all new and converted homes must have sprinklers.