New Build
Construction
Custom new build houses, self-build projects, and garden plot developments across London and Hertfordshire. Turnkey project management from planning through to handover.
New Build Services
From a single self-build on a garden plot to a small residential development, TCM Building manages every aspect of the new build process.
Detached New Builds
Custom-designed detached houses on individual plots, built to your specification from foundations to final finishes.
Semi-Detached & Terraced
New semi-detached and terraced houses, including infill plots and gap-site developments in urban areas.
Self-Build Projects
We work with self-builders to deliver their vision — from groundworks and structure through to first fix and beyond.
Bungalows & Annexes
Single-storey new builds, bungalows, and self-contained annexes for multi-generational living or rental income.
Garden Plot Developments
New builds on garden plots and subdivided land, including planning application management and utility connections.
Commercial New Builds
New commercial buildings, warehouses, and mixed-use developments for business and investment clients.
Our 7-Stage New Build Process
A transparent, structured process that takes your project from initial plot assessment through to keys in hand.
Site Assessment & Feasibility
We assess your plot, review planning constraints, and provide an honest feasibility appraisal — including likely build cost and programme.
Planning Application
We work with architects and planning consultants to prepare and submit your planning application, managing the process through to approval.
Design & Specification
Detailed construction drawings, structural calculations, and a full specification are prepared. We obtain Building Regulations approval before work starts.
Groundworks & Foundations
Site clearance, excavation, drainage, and foundations are laid. We use NHBC-registered subcontractors for all groundworks.
Structure & Weathertight
Superstructure construction — blockwork, timber frame, or steel frame — through to roof, windows, and external doors. The building is made weathertight.
First & Second Fix
All mechanical and electrical first fix, insulation, plasterboard, and internal joinery. Second fix — kitchens, bathrooms, electrics, plumbing, and decorating.
Completion & Handover
Snagging, Building Regulations completion certificate, and full handover pack including all warranties, guarantees, and O&M documentation.
New Build Cost Guide — London 2025
Build costs per square metre for London and Hertfordshire. Excludes land, professional fees, and planning costs.
| Specification | Typical Cost | Notes |
|---|---|---|
| Basic Specification New Build | £1,800 – £2,200 per m² | Standard finishes |
| Mid-Range Specification | £2,200 – £2,800 per m² | Good quality finishes |
| High Specification New Build | £2,800 – £3,500+ per m² | Premium finishes |
| London Premium (add) | +15% – +25% | On all above figures |
| Typical 3-bed detached (120m²) | £216,000 – £420,000 | Excluding land & fees |
| Typical 4-bed detached (160m²) | £288,000 – £560,000 | Excluding land & fees |
All costs are estimates. Survey and detailed specification required for accurate quotation. Costs include VAT.
"TCM built our self-build home on a garden plot in Hertfordshire. From planning application to handover, they managed everything professionally. The quality of the build is exceptional and we moved in on schedule."
Related Services & Guides
Single and double-storey extensions as an alternative to moving or building new.
Understand Permitted Development rights and when planning permission is required.
15+ years of experience, Checkatrade verified, and fully insured.
New Build FAQs
Ready to Build Your New Home?
Contact us for a free feasibility consultation. We will assess your plot, advise on planning potential, and provide an indicative build cost — completely free of charge.
Starting a new build project can feel like a huge undertaking, can't it? You're not just building a structure; you're creating a future home or a thriving business environment. It's a significant investment of time, emotion, and money, and you want to get it right. That's where we come in. Simply put, a new build is the construction of a brand-new property from the ground up. This includes everything from initial site preparation and foundations to the final finishes and landscaping. It's about bringing a fresh design to life, tailored exactly to your specifications and needs. Why does this matter to you? Because a new build offers unparalleled freedom. You get to decide every detail, ensuring the property perfectly aligns with your lifestyle or business goals. It's an opportunity to create something truly unique, built to modern standards of efficiency and comfort, without the compromises often found in existing properties.
You've been thinking about your current space, haven't you? Maybe it's too small, doesn't quite fit your family's needs, or your business is outgrowing its premises. You know you need a change, something more tailored, but you're not sure what the best solution is yet. Is it an extension, a renovation, or something entirely new? You're exploring options, trying to figure out how to get the perfect space that truly works for you.
What You Need to Know
Full Project Management, Groundworks to Completion
We take care of every single step of your new build. From laying the first brick to the final coat of paint, our team manages the entire process. You won't need to juggle multiple contractors; we handle it all, ensuring a seamless and stress-free experience for you.
Expert Navigation of Planning & Regulations
Dealing with planning permission and building regulations can be a headache, can't it? We've got extensive experience in Hertfordshire, so we know the local requirements inside out. We'll guide you through the paperwork and approvals, making sure your project complies with all necessary standards.
Assured Quality with NHBC Warranty
Your peace of mind is paramount. All our new builds come with an NHBC warranty, giving you confidence in the quality and longevity of your investment. This means your property is protected, and you're covered for any structural issues that might arise.
Tailored Residential & Commercial Solutions
Whether you're looking to build a bespoke family home or a functional commercial property, we've got the expertise. We understand the different demands of residential and commercial projects and deliver custom solutions that meet your specific requirements and aspirations.
Everything Else You Should Know
Understanding Your New Build Costs
How much does a new build really cost? It's a common question, and the answer depends on many factors like size, materials, and finishes. We provide transparent, detailed quotes, breaking down every expense so you know exactly where your money is going. We'll help you budget effectively from the start.
Navigating Planning Permission and Building Regulations
The journey to a new build always involves planning permission and adherence to building regulations. These aren't just hurdles; they're safeguards ensuring your property is safe, sustainable, and fits its surroundings. We'll manage the entire application process, ensuring everything is in order and approved efficiently.
New Build vs. Renovation: Which is Right for You?
You might be wondering if a new build is better than renovating an existing property. A new build offers complete customisation and modern efficiency, while renovation can be quicker and often less disruptive. We can discuss your specific situation to help you decide which path makes the most sense for your goals and budget.
Common Mistakes to Avoid in New Build Projects
Building a new property can be complex, and it's easy to make mistakes if you're not careful. Things like inadequate budgeting, poor site management, or overlooking critical regulations can cause delays and extra costs. We'll help you steer clear of these common pitfalls with our experienced project management and attention to detail.
Where We Deliver New Builds
TCM Building & Maintenance is based in Borehamwood and serves Hertfordshire, North London, and the surrounding area. Each location page covers planning authority details, property types, and local considerations specific to that area.
Our home base. Fast response times across the whole town.
Serving Radlett's conservation areas and Green Belt properties.
Covering Bushey, Bushey Heath, and the surrounding Hertsmere area.
Serving Potters Bar, Brookmans Park, Northaw, and Cuffley.
Full coverage across Watford and the Three Rivers district.
Experienced in St Albans conservation areas and listed buildings.
Covering Hatfield, Welham Green, Birchwood, and Old Hatfield.
Specialists in the WGC Conservation Area's Arts and Crafts properties.
Serving all parts of the London Borough of Barnet.
Covering Edgware, Canons Park, Burnt Oak, and Queensbury.
Serving Stanmore, Harrow Weald, Belmont, and the surrounding area.
Not sure if we cover your area? Call 07305 121634 — we serve a wide area across Hertfordshire and North London.