Building Work You Can
Actually Rely On.
TCM Building & Maintenance has been delivering house extensions, loft conversions, refurbishments, and commercial fit-outs across Borehamwood, Hertfordshire, and North London for over 15 years. Checkatrade verified. IPAF certified. Fixed-price quotes.
Our Core Services
From single-room renovations to full commercial fit-outs, TCM manages every aspect of your build — one team, one contract, zero stress.
House Extensions
Single and double storey rear, side return, and wrap-around extensions that add space and value.
Loft Conversions
Dormer, Mansard, Hip-to-Gable, and Velux conversions — transforming unused roof space into beautiful living areas.
Property Refurbishments
Full house renovations managing all trades under one roof, from strip-out to final decoration.
Commercial Fit-Outs
Retail, office, and industrial fit-outs delivered on time and on budget, minimising your downtime.
Fire & Flood Renovation
Rapid response renovation after fire or flood damage. We work directly with insurers to restore your property.
Basement Conversions
Excavation, waterproofing, and fit-out of basement and cellar spaces to create premium habitable rooms.
15 Years of Building
Trust. Quality. Results.
TCM Building & Maintenance was founded on a simple principle: do the work you'd want done on your own home. Based in Borehamwood, we serve homeowners and businesses across Hertfordshire and North London — from Watford and St Albans to Barnet, Finchley, and Harrow.
Every project is managed by our in-house team of structural engineers, architects, and specialist tradespeople. You deal with one point of contact from the first survey to the day you get your keys back. No subcontractor roulette. No surprises on the final invoice.
Loft Conversions That
Transform Your Home
A loft conversion is one of the most cost-effective ways to add space and value to your home — typically adding 20–25% to your property's value without losing garden space.
Commercial Fit-Outs &
Office Refurbishments
We understand that business downtime costs money. Our commercial team works around your schedule — including out-of-hours and weekend working — to deliver fit-outs and refurbishments that minimise disruption to your operations.
What Our Clients Say
"TCM transformed our Victorian terrace with a stunning rear extension. The team was professional, tidy, and finished ahead of schedule. Absolutely delighted with the result."
"We had a full loft conversion done and couldn't be happier. From planning to completion, TCM managed everything seamlessly. The quality of workmanship is exceptional."
"After a kitchen fire, TCM responded within hours and managed the entire restoration. They liaised with our insurers and returned our home to a better state than before."
Serving London &
Hertfordshire
Based in Borehamwood, we cover a wide area within approximately 10 miles — including Watford, Barnet, Harrow, Finchley, Hendon, St Albans, and throughout Hertfordshire.
Borehamwood
Our home base — serving WD6 and surrounding areas.
Watford
Full building services across Watford and Cassiobury.
Barnet
Extensions and loft conversions across the Barnet borough.
Hertfordshire
Covering all major towns across the county.
24/7 Emergency Property Services
Burst pipes, structural damage, fire or flood — our emergency team is available around the clock to secure and restore your property.
Ready to Transform
Your Property?
Get a free, no-obligation quote from our expert team. We'll visit your property, listen to your vision, and provide a detailed, transparent estimate.