15 Years of Building
Trust, One Project at a Time
We know choosing a builder is one of the most significant decisions you'll make. Here is why over 500 homeowners and businesses across London and Hertfordshire have trusted TCM Building & Maintenance.
Built on Craftsmanship,
Driven by Integrity
TCM Building & Maintenance was founded by Constantin Popescu, a builder with over 15 years of hands-on experience in residential and commercial construction across London and Hertfordshire.
Constantin built TCM on a simple belief: that every client deserves the same standard of work he would want for his own home. That means honest pricing, clear communication, skilled trades, and a finish that lasts.
From a single-person operation, TCM has grown into a multi-disciplinary team that includes in-house architects, structural engineers, party wall surveyors, and specialist tradespeople — giving clients a complete, coordinated service under one roof.
Today, TCM is one of the most respected building and maintenance companies in East London and Hertfordshire, with a 5.0-star Checkatrade rating and a portfolio of over 500 completed projects.
"I'm so incredibly proud of our team at TCM for being recognised as great at our job, super friendly as people, and for delivering projects that look incredibly professional."
Six Reasons Clients Choose Us
We know you have a choice of builders. Here is what makes TCM different — and why our clients come back to us, and refer us to their friends.
15+ Years of Proven Experience
Founded in 2009, TCM has completed over 500 projects across London and Hertfordshire. Our track record speaks for itself — from single-room refurbishments to full commercial fit-outs.
In-House Multi-Disciplinary Team
Unlike many builders who subcontract everything, our team includes in-house architects, structural engineers, party wall surveyors, and interior designers — giving you a complete, coordinated service.
Communication at Every Stage
We assign a dedicated project manager to every job. You will always know who to call, and you will always receive a prompt response. Weekly progress updates as standard.
Fully Compliant & Certified
All our work is carried out in full compliance with Building Regulations. We are Checkatrade verified, IPAF certified, and CSCS card-holding across our entire site team.
On Time & On Budget
We provide detailed, fixed-price quotations before any work begins. No vague estimates, no day-rate surprises. Our project management process is built around delivering on time.
End-to-End Project Management
From initial consultation and planning permission through to final snagging and handover, we manage every aspect of your project. You deal with one team, one point of contact.
From First Call to Final Key
Every TCM project follows the same five-stage process — designed to keep you informed, in control, and confident at every step.
Free Consultation
Contact us by phone, email, or our online form. We'll discuss your project, answer your questions, and arrange a convenient time for a free site visit.
Site Survey & Design
Our team visits your property to take measurements, assess structural requirements, and discuss design options. We work with our in-house architects and engineers where needed.
Fixed-Price Quotation
We provide a detailed, itemised, fixed-price quotation — no vague estimates. We also handle planning permission applications and Building Regulations submissions on your behalf.
Build & Project Management
Work begins on the agreed start date. Your dedicated project manager oversees every stage, coordinates all trades, and keeps you informed with regular progress updates.
Completion & Handover
We carry out a thorough snagging inspection before handover. You receive all relevant certificates, warranties, and Building Regulations completion certificates.
Certified, Verified & Compliant
One Team. Every Discipline.
Unlike many building companies that rely entirely on subcontractors, TCM has built an in-house multi-disciplinary team. This means better coordination, higher quality control, and a single point of accountability for your entire project.
The TCM Promise — On Every Single Project
We don't just build structures — we build trust. Every project we undertake comes with our full commitment to the following standards, without exception.
The Principles We Build By
Integrity
We are respectful and fair to every client, every time. No hidden costs, no surprises.
Safety
Total commitment to safety at every level — from site management to every individual operative.
Innovation
Our team are part of the decision-making process. Better ideas come from collaborative thinking.
Stability
Reliability and consistency that results in a satisfied client, delivered within budget.
Teamwork
We don't work as individuals — we work together as a team, as a family.
Quality
Our goal is simply to be the best and to continually improve our work with the highest standards.
Community
Committed professionals who save clients money through cost-effective, practical solutions.
Character
Above all else, we are an ethical, dependable company that focuses on quality over everything.
What Our Clients Say
"Constantin and his team were exceptional from start to finish. The extension was completed on time, on budget, and the quality of the finish is outstanding. I wouldn't hesitate to recommend TCM to anyone."
"What sets TCM apart is the communication. We always knew what was happening, when, and why. The team treated our home with real respect. The loft conversion has completely changed our lives."
"I've used other builders before and the difference with TCM is night and day. Fixed price, no surprises, and the work is genuinely excellent. Constantin runs a very professional operation."
Let's Talk About
Your Project
Contact Constantin and the team today for a free, no-obligation site survey and fixed-price quotation. We cover all areas of London and Hertfordshire.