Build Check
Build Check provides UKAS-accredited fenestration testing and certification services for UK window and door fabricators, system houses, and specifiers, covering weather, security, performance, and thermal transmittance testing. It also operates the subscription-based BuildCheck Oracle platform for self-service U-value and acoustic compliance calculations.
- Company typePrivate
- Founded2004
- HeadquartersHigh Wycombe, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Build Check does
Build Check Ltd is a UKAS-accredited (No. 2731) testing laboratory founded in 2004 and headquartered in Brill, Buckinghamshire. It operates as a private limited company and is a wholly-owned portfolio company of Phenna Group, sitting within the group's Built Environment Division. The company provides laboratory and on-site facade, water, weather, performance, and security testing services for the UK fenestration industry, including CWCT sequence B testing, PAS 24 security testing, BS 6375-2 performance testing, and thermal transmittance (U-value) calculations under BS EN ISO 10077-1/2. Its proprietary assets include a custom-built weather testing rig capable of accommodating samples up to 3000mm x 3000mm and the BuildCheck Oracle online subscription platform, which hosts manufacturer component libraries and enables fabricators, installers, and sealed unit manufacturers to self-produce U-value, acoustic, window energy rating, and Factory Production Control calculations for Part L Building Regulation compliance.
The business is run on a hybrid revenue model: fee-based professional services for laboratory and on-site testing engagements, supplemented by recurring subscription revenue from Oracle. Build Check goes to market through a national field engineering network for on-site CWCT and water testing, inside sales (phone, email, online quote forms) for laboratory bookings, and product-led self-service for Oracle. The customer base is concentrated in the UK fenestration value chain — window and door fabricators, system houses, sealed unit manufacturers, and architectural specifiers — with services feeding into UKCA marking, CERTASS, FENSA, and Secured by Design certification outcomes. Partnerships with CWCT, UKAS, Secured by Design, CERTASS, and FENSA integrate Build Check's evidence into the UK's regulated fenestration certification chain, supporting its regulatory moat in a niche vertical.
Operating scale is modest at 11-50 employees, primarily engineers and technical specialists; specific revenue is undisclosed. The company is governed by the laws of England and Wales, holds ISO/IEC 17025 conformance for its management and quality system, and operates in a UK construction and fenestration end market that has been cyclical but remains regulation-driven, supporting stable underlying demand for third-party compliance testing.
Build Check firmographics
Firmographics- Name
- Build Check
- Legal name
- Build Check Ltd
- Website
- https://buildcheck.co.uk
- Company type
- Private
- Founded year
- 2004
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Build Check provides UKAS-accredited fenestration testing and certification services for UK window and door fabricators, system houses, and specifiers, covering weather, security, performance, and thermal transmittance testing. It also operates the subscription-based BuildCheck Oracle platform for self-service U-value and acoustic compliance calculations.
- Ownership category
- akta.pro rank
Build Check industry classification
Industry- Product category
- Fenestration Testing and Certification Services
- NAICS
- Testing Laboratories and Services (541380)
- SIC
- Services-Testing Laboratories (8734)
- akta.pro primary industry
- Testing, Adjusting & Balancing (TAB) & Performance Verification (BPABACAJ)
- akta.pro secondary industries
- Building Compliance Testing & Certification (Backflow, RPZ, Cross-Connection) (BPABAHAK), Building Envelope & Weatherproofing (Roofing/Waterproofing/Gutters) (IMAIABAG)
Keywords
Where Build Check is headquartered
LocationHeadquarters
- HQ city
- High Wycombe
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Build Check business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Infrastructure, Technology or R&D, Operations, Marketing or Sales
Revenue model
- Laboratory Testing Services: UKAS-accredited laboratory testing for windows and doors including weather testing, performance testing (BS 6375), PAS 24 security testing, CWCT façade testing, and thermal transmittance calculations. Revenue generated through per-test fees for product certification and compliance verification.
- On-site CWCT Testing Services: On-site water testing services including hose testing for closed-joint curtain walling and spray bar testing for open-jointed systems, providing compliance verification for CWCT standards and NHBC requirements.
- Oracle Subscription Service: Subscription-based access to the Oracle online calculator platform providing U-value calculations, acoustic calculations, window energy ratings, and factory production control templates. Enables fabricators and installers to self-produce calculations for Part L Building Regulation compliance.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Multi-year contract | Oracle subscription service for U-value and acoustic calculations |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels4 records
Build Check product offering
Product offeringCore offering
Build Check provides UKAS-accredited laboratory and on-site façade, weather, and water testing services for windows, doors, curtain walling, and rainscreen systems in the fenestration industry. It also offers the BuildCheck Oracle online subscription platform for U-value, acoustic, and Factory Production Control calculations supporting Part L Building Regulation compliance, and PAS 24 security testing supporting Secured by Design and Approved Document Q requirements.
Product overview
Build Check offers a portfolio of fenestration testing and compliance software products. The core offering consists of BuildCheck Oracle (an online subscription platform providing U-value calculations, acoustic calculations, and Factory Production Control templates for Part L compliance) alongside a comprehensive suite of laboratory and on-site testing services covering CWCT facade testing, CWCT Sequence B testing, weather testing, PAS 24 security testing, BS 6375-2 performance testing, and thermal transmittance calculations. The Oracle platform serves as the software component enabling fabricators and installers to self-serve compliance calculations, while the testing services provide UKAS-accredited physical testing and certification for product development and regulatory compliance.
Differentiator
Problem solved
Functional benefit
Brands
- BuildCheck Oracle: Online U-value calculator tool and publication platform for Part L compliance, providing thermal calculations, acoustic calculator, and quality control system templates for the fenestration industry.
Products and services
- Laboratory Testing Services In-house laboratory testing services for windows and doors offering comprehensive evaluation of façade systems, weather resistance, air permeability, watertightness, and wind load resistance for product development and regulatory compliance. UKAS-accredited (No. 2731).
- On-site CWCT Testing On-site testing services including hose testing for closed-joint curtain walling and spray bar testing for open-jointed systems, ensuring compliance with CWCT standards and NHBC requirements for façade installations.
- CWCT Sequence B Testing Rigorous façade testing evaluating air permeability, water penetration resistance, wind resistance, and impact resistance of building envelope systems to CWCT standards.
- Weather Testing Laboratory weather testing services using a custom-built rig (up to 3000mm x 3000mm) assessing air permeability (BS EN 1026:2016), watertightness (BS EN 1027:2016), and wind load resistance (BS EN 12211:2016).
- PAS 24 Testing UKAS-accredited testing for enhanced security performance of doorsets and windows to PAS 24:2022 standard, supporting Secured by Design (SBD) and Approved Document Q compliance.
- Performance Testing UKAS-accredited testing to BS 6375-2 standard evaluating operating force, impact resistance, and mechanical strength of windows and doors.
- Thermal Transmittance (U-Value) Calculations UKAS-accredited U-value calculations (BS EN ISO 10077-1:2017) for windows and doors, including 2D thermal transmittance modelling (BS EN 10077-2:2017) supporting Declaration of Performance (DoP) and UKCA marking.
- R&D and Other Testing Services Bespoke research and testing services for windows and doorsets, including custom test design, performance testing, durability testing, and safety testing tailored to unique product requirements.
- BuildCheck Oracle Online subscription-based software platform providing U-value calculations, acoustic calculations, and Factory Production Control (FCP) templates for the fenestration industry, enabling fabricators and installers to achieve Part L building regulation compliance.
Companies that use Build Check
Customer profileNamed customers4 records
Segments4 records
Ideal customer profiles4 records
Build Check technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Build Check partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and minor.
- Phenna GroupcoreBuild Check is a portfolio company of Phenna Group, a global Testing, Inspection, Certification and Compliance (TICC) business. Being part of Phenna Group enables access to complementary services, technical knowledge, and industry best practices across divisions including Infrastructure, Industrials, Food and Life Sciences, and Certification and Compliance.
- Centre for Window and Cladding Technology (CWCT)coreBuild Check is a proud member of CWCT, a leading authority on building envelopes. The partnership enables Build Check to offer CWCT-compliant on-site and laboratory testing services for facades, curtain walling, and rainscreen systems, meeting NHBC requirements and industry standards.
- CERTASSminorCERTASS is a UK certification body for fenestration products. Build Check's UKAS-accredited calculations and test evidence support CERTASS certification for UKCA marking applications.
- FENSAminorFENSA (Fenestration Self-Assessment Scheme) is a UK government-authorised competent person scheme for window and door installations. Build Check provides test evidence and calculations required for FENSA certification and compliance.
- UKAS (United Kingdom Accreditation Service)coreUKAS is the national accreditation body for the UK. Build Check holds UKAS accreditation (No. 2731) for testing laboratory activities, ensuring independent verification of testing services meets recognised standards.
- Secured by Design (SBD)coreSecured by Design is a UK Police initiative promoting the use of products that meet recognised security standards. PAS 24 testing from Build Check supports products achieving Secured by Design accreditation, aligning with UK Police crime prevention goals.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
Build Check competitors and assessment
Company assessmentDirect peers
- Wintech Testing & Certification: UK-based fenestration testing laboratory offering weather, security, performance, and thermal transmittance testing for windows and doors. Wintech is the closest direct competitor to Build Check, operating in the same UKAS-accredited fenestration testing niche with overlapping customer base of fabricators and system houses.
- BBA (British Board of Agrément): UK certification body issuing Agrément Certificates for construction products including windows, doors, and façades. BBA is a direct comparability peer as an upstream certification gatekeeper for fenestration products, often requiring test evidence from UKAS-accredited laboratories like Build Check.
Broad incumbents
- Element Materials Technology: Global Testing, Inspection, and Certification (TIC) provider offering building products testing, fenestration performance, and fire/safety testing across multiple industries. Element competes with Build Check in window and façade testing while operating a much broader testing portfolio across aerospace, energy, and life sciences.
- BRE Group (Building Research Establishment): UK building science organization offering testing, certification, and standards development for construction products and systems, including fenestration and building envelope performance. BRE provides similar UKAS-accredited testing services and is recognized by BREEAM, NHBC, and CWCT as an authoritative voice.
- Bureau Veritas: Global TIC conglomerate providing building and infrastructure testing, inspection, and certification services worldwide. Bureau Veritas competes with Build Check on larger commercial façade and curtain wall testing projects, particularly for international developers operating in the UK.
- SATRA Technology Centre: UK-based testing and certification organization providing product testing across footwear, PPE, furniture, and construction products including windows and doors. SATRA overlaps with Build Check in fenestration performance and security testing while serving a much wider product testing portfolio.
- Intertek: Global TIC provider offering building products testing, fenestration performance, and certification services across multiple geographies. Intertek competes with Build Check at the high end of large-format façade testing while serving much broader product categories and international markets.
- UL Solutions: Global safety science company providing testing, inspection, and certification for building products including windows, doors, and façades. UL Solutions competes with Build Check in UK and European fenestration testing while operating a substantially larger global TIC platform with adjacent fire and security offerings.
- BM TRADA (part of Element): UK timber, construction products, and fire safety testing/certification body providing Q-Mark certification, façade testing, and window/door performance certification. BM TRADA's Q-Mark scheme directly overlaps with Build Check's PAS 24 and Secured by Design offerings in the UK fenestration market.
Emerging players
- Kiwa UK: UK and European TIC provider offering testing and certification for construction products including fenestration, with growing UK presence through acquisitions. Kiwa UK overlaps with Build Check on certification-adjacent services but with a broader portfolio including water, gas, and fire safety testing.
Market position
Strengths1 record
Weaknesses1 record
Competitive moat3 records
Key risks6 records
Key highlights7 records
Customer concentration
Build Check social profiles
Digital presenceBuild Check compliance and trust
Trust signalCompliance2 records
Build Check financial estimates
Financial estimateRevenue estimate
Valuation estimate
Build Check leadership team
Management profileNumber of profiles
Build Check funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Build Check M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Build Check
What does Build Check do?
Build Check provides UKAS-accredited laboratory and on-site façade, weather, and water testing services for windows, doors, curtain walling, and rainscreen systems in the fenestration industry. It also offers the BuildCheck Oracle online subscription platform for U-value, acoustic, and Factory Production Control calculations supporting Part L Building Regulation compliance, and PAS 24 security testing supporting Secured by Design and Approved Document Q requirements.
Is Build Check a public or private company?
Build Check is a private company. It is classified as corporate owned and is currently operating.
When was Build Check founded?
Build Check was founded in 2004. It employs 11 to 50 people.
Where is Build Check based?
Build Check is headquartered in High Wycombe, United Kingdom, in the Europe region.
How does Build Check make money?
Three revenue lines are on record. Laboratory Testing Services are the primary driver. The others are on-site CWCT Testing Services and oracle Subscription Service.
Who are Build Check's main competitors?
Direct peers on record are Wintech Testing & Certification and BBA (British Board of Agrément). Broad incumbents are Element Materials Technology, BRE Group (Building Research Establishment), Bureau Veritas, SATRA Technology Centre, Intertek, UL Solutions and BM TRADA (part of Element). Kiwa UK is listed as an emerging player.
Does Build Check have an API?
No public API is recorded for Build Check.
What industry is Build Check in?
Build Check's product category is Fenestration Testing and Certification Services. Its primary akta.pro industry code is BPABACAJ, Testing, Adjusting & Balancing (TAB) & Performance Verification, with a secondary code of BPABAHAK, Building Compliance Testing & Certification (Backflow, RPZ, Cross-Connection). Its NAICS code is 541380 and its SIC code is 8734.