TrustMark accredited companies in London

120 construction companies in and around London displaying TrustMark.

• 2 21 Degrees London · Solar PV

  Change the way you think about energy by Harnessing your own sustainable energy to improve efficiency, comfort and the planet.

• A Ada Windows Ltd London · Windows & doors

  FENSA registered installers based in Enfield, North London. We manufacture and install UPVC and aluminium energy efficient windows, doors & bifolds.

• A Agir London Construction Ltd London · Refurbishment

  AGIR London Construction offers a wide range of construction services including renovations, refurbishments, extensions, new builds, and more. With ov

• A Ask Windows Ltd London · Windows & doors · 1-9 employees

  Ask Windows Ltd offers double and triple glazed windows, doors, and conservatories in Mill Hill, London. Experts in uPVC products with a focus on qual

• A ATLAS ROOFING SOLUTIONS LTD London · Roofing

  Atlas Roofing Solutions Ltd offers expert roofing, guttering, and uPVC fascia & soffit services in London and surrounding areas. With 20 years of expe

• A AZ Electrical London · Electrical

  Expert residential and commercial electrical services in London. Full-service electrician, from installation to design and consultancy. Call 07508 885

• B Baseline Ltd London · Refurbishment · 1-9 employees

  South London based renovation, installation and maintenance company specialising in high-end residential projects. Offering quality workmanship for ki

• B BDG Contracts London · Insulation · 1-9 employees

  Trusted retrofit installation partner for main contractors, local authorities and housing associations. Delivering PAS 2030-compliant insulation, fene

• B Bella Landscape Construction Ltd London · Landscaping · 1-9 employees

  Bella Landscape Construction Ltd specialises in designing and building stunning, functional outdoor spaces. With expertise in landscape design and con

• B Bera Springs Services Ltd London · Fit-out & interiors

  Bera Springs Services Ltd is a UK construction company specializing in fire compartmentation, school renovations, retail/commercial fit-outs, and ener

• B BG Construct London · Main contractor

  B & G Construct Ltd offers bespoke new builds, loft conversions, and home extensions. With over 15 years of experience and 50+ projects completed, the

• B Brit Builders Ltd London · Main contractor

  Certified London builders. Extensions, loft conversions, new builds, renovations, kitchens, bathrooms, electrical, gas & roofing. Free quotes in 24 ho

• B Britelite Windows London · Windows & doors · 10-49 employees

  Talk to Britelite for amazing value, high-quality windows, doors and conservatories across Kent, Sussex, Essex, Surrey and London. We're trusted, we c

• B Brown Building Ltd London · Main contractor · 1-9 employees

  Brown Building is a well-established, London-based company with an outstanding reputation for creating inspirational and functional living spaces.

• B Build My Space Ltd London · Main contractor · 1-9 employees

  Transform your space with Build My Space Limited - the general builder contractor in London. Discover our services and contact us today.

• B Builders London Ltd London · Main contractor

  Elite Builders London Specialise In Small & Large Residential/Commercial Projects. From Renovations to New Builds, Extension & Basement/Loft Conversio

• C Chelsea And Fulham Builders Ltd London · Refurbishment · 1-9 employees

  High-end builders in London delivering expert renovations, extensions & refurbishments in Chelsea, Fulham, Kensington and beyond. Get a quote today.

• C Complete Solar Energy Ltd London · Solar PV · 1-9 employees

  Discover Complete Solar Energy Ltd in Romford. 10 years of experience. 2,000+ installations. Delivering expert solar solutions for homes and businesse

• C Cosier Heat Ltd London · Heating & ventilation

  Switch to a heat pump with Cosier. Our experienced team designs and installs MCS Certified heat pump systems tailored to your home, with grants availa

• D Davies Daniel Refurbishments Ltd London · Refurbishment

  Davies Daniel offers high-quality restoration, refurbishment, maintenance, and property management services throughout London. Reformed in 2014, they

• D Decoracus Ltd London · Refurbishment

  London High-End Building Contractor with over 20 Years of experience. Kitchen Extension Specialists.

• D Decoworks Construction Ltd London · Refurbishment · 1-9 employees

  DecoWorks Construction LTD is based in London UK. Specialising in refurbishment works, lofts, extensions and basements we are experts at construction

• D Deltawatt Ltd London · Electrical

  Deltawatt Ltd are trusted electrical and renewable energy specialists covering Kent and South East London. From rewires to solar panels, get a free qu

• D Denham Crescent Ltd London · Design & build · 1-9 employees

  Denham Crescent Ltd is a building company in South West London specialising in home extensions, loft conversions, and full renovations for residential

• D Dmgc Ltd London · Refurbishment

  DMGC Ltd offers top-quality construction services for residential and commercial projects, specializing in precision and reliability. Explore our serv

• D Ds Damp Proofing Ltd London · Damp proofing

  DS Damp Proofing Ltd specialises in structural waterproofing, damp proofing, and cementitious slurry systems. Offering free surveys and reports across

• D DUMREA BUILDING CONSTRUCTION LTD London · Refurbishment

  Expert builders in South East London. We offer building renovations, domestic maintenance, loft conversions, extensions, and refurbishments.

• E Eco First Group Ltd London · Solar PV

  Eco First Group Ltd, based in London, offers MCS-accredited solar panel installations for homes and businesses, alongside EV chargers and a specialist

• E Eco Target London · Insulation · 10-49 employees

  Eco Target Ltd is a professional energy services company with over 15 years of collective experience in the energy industry, offering affordable energ

• E Electric Forces Ltd London · Electrical · 1-9 employees

  Electric Forces provides expert electrical services for residential and commercial clients in London and the UK. Offering 24/7 emergency call-outs, re

• E Electric Tech Ltd London · Electrical · 1-9 employees

  Professional electrical contractors in Ealing, London. Established for 10 years, providing quality electrical installations and repairs for residentia

• E Eleventh Element Ltd London · Design & build

  Award-winning turn-key construction company specialising in architecture-driven prime residential builds and refurbishments in London & the South East

• E Envy Electrical Ltd London · Electrical

  NICEIC-approved electrician covering Gravesend, North Kent. Specialising in EV chargers, rewires, EICRs & fault finding. Offers free quotes & 24/7 eme

• E Evigo London · EV charging

  Evigo are OZEV-authorised EV-charger installers and NICEIC-approved electricians serving London and the Home Counties. Transparent pricing, friendly e

• E EXPERT MAINTENANCE LONDON LTD London · Electrical · 1-9 employees

  Expert Maintenance London provides comprehensive electrical services, including planned maintenance, fault finding, landlord certifications, and 24-ho

• F Facelift Electrical Services Ltd London · Electrical

  FACELIFT ELECTRICAL SERVICES guarantees you a prompt, reliable, customer centred service for all your wiring and electrical needs.

• F Fahri Electricians London Ltd London · Electrical

  Family-run electricians in London offering 24/7 emergency callouts, domestic and commercial electrical services, testing, and installations. Experienc

• F Ferbogar UK Ltd London · Main contractor · 10-49 employees

  London's trusted building contractor for construction, refurbishment, roofing and maintenance. Request a quote or book a site visit with Ferbogar UK L

• F First Landlord Certificates London London · Electrical · 1-9 employees

  Book landlord certificates and request electrical services across London. EICR, EPC, CP12, fire safety, PAT, HMO and electrical work from First Landlo

• F Fixiz London · Loft conversions · 1-9 employees

  Fixiz delivers loft conversions, house extensions, garage conversions and property services across North London. Request a no-obligation project revie

• F Fyndpris Ltd London · Utilities

  Fyndpris Ltd offers smart, simple, and cost-effective utility connections for gas, electricity, and water to homeowners, developers, and businesses ac

• G Ggc Electrical Ltd London · Electrical

  GGC Electrical LTD is your trusted partner for high-quality, safe, and efficient electrical solutions for homeowners, landlords, estate agents, and bu

• G Glazing Southern Solutions Ltd London · Glazing

  Glazing Southern Solutions (GSS) engineers premium aluminium windows, doors, curtain wall, roof lights, wintergardens and metal cladding for residenti

• G Green ECO Services London · Insulation

  Green ECO Services helps homes and businesses achieve a net zero future by recommending and implementing energy efficiency measures, including heating

• H Harmer Services Ltd London · Plumbing

  Harmer Services Ltd is a professional plumbing, heating, electrical, and gas company covering London, Hertfordshire, and Essex. Specialising in boiler

• H Heat Pump Installer Directory London · Heating & ventilation

  Find and compare MCS certified heat pump installers near you. Claim the £7,500 Boiler Upgrade Scheme grant. Free quotes from trusted UK installers.

• H Hi-Load Electrical Ltd London · Electrical

  Professional NICEIC-approved electricians based in Park Gate, offering electrical services across Hampshire, including Winchester, Portsmouth, Eastlei

• H HMS ECO HOMES London · Insulation

  HMS ECO HOMES LTD specializes in high-quality energy efficiency solutions, offering insulation and heating services under the ECO4 scheme for eligible

• I Installio Ltd London · Solar PV

  Installio delivers clean energy upgrades as one connected system, helping improve EPC ratings and reduce household energy bills. From solar and batter

• I INSULATION SPECIALISTS LTD London · Insulation

  Insulation Specialists Ltd offers expert insulation services, focusing on renewable and environmentally friendly energy sources to create comfortable