
TCM Building delivers extensions, loft conversions, refurbishments, and property maintenance across North London — covering Barnet, Enfield, Haringey, Waltham Forest, and the surrounding areas. Trusted by North London homeowners for over 15 years.
North London is one of TCM Building's most active service areas. We cover a broad sweep of North and North-East London — from Barnet and Enfield in the north to Haringey, Waltham Forest, and Hackney in the south. Our team has completed hundreds of projects across North London's diverse housing stock, from Victorian terraces and Edwardian semis to 1930s suburban semis and modern apartment conversions.
North London's Victorian and Edwardian housing stock is particularly well-suited to loft conversions. The area's characteristic terraced houses — with their steeply pitched roofs and generous ridge heights — are ideal for dormer and hip-to-gable conversions that create substantial additional living space. Rear extensions, basement conversions, and full refurbishments are also extremely popular across the area.
TCM works across multiple North London planning authorities, including the London Boroughs of Barnet, Enfield, Haringey, Waltham Forest, and Hackney. We have a strong track record of securing planning approvals across all these authorities and are experienced in navigating the specific policies and Conservation Area requirements of each borough.
Single and double-storey rear, side, and wrap-around extensions.
Dormer, hip-to-gable, Velux, and mansard loft conversions.
Full property refurbishments, kitchen and bathroom renovations.
Integral, attached, and detached garage conversions.
Cellar conversions, basement excavations, and underpinning.
New builds, structural repairs, concreting, and demolition.
Planned and reactive maintenance for homes and businesses.
Emergency call-out for structural damage, leaks, and fire/flood.
North London spans multiple London Borough planning authorities, each with its own policies and character area guidance. TCM has experience working with all the major North London authorities and a strong track record of securing planning approvals. We advise on the planning position for every project during the free site survey.
North London's housing stock is predominantly Victorian and Edwardian — terraced houses, semi-detached properties, and purpose-built mansion blocks. This stock is exceptionally well-suited to loft conversions, rear extensions, and basement conversions. Many properties have existing cellars that can be converted into habitable rooms with relatively modest investment.
North London has a large number of Conservation Areas — particularly in Barnet, Haringey, and Hackney — which restrict external alterations and require planning permission for works that would otherwise be Permitted Development. Article 4 Directions are also common in parts of North London. TCM is experienced in navigating these restrictions and advising on the best approach for each property.
We offer a free, no-obligation site survey for all projects in North London and the surrounding areas.
Book a Free SurveyTCM has been delivering building and maintenance projects in North London and surrounding areas for over 15 years. We know the local planning authorities, the local building stock, and the local market.
All our tradespeople are independently verified on Checkatrade. Our 5-star rating is based on genuine, verified reviews from clients in your area.
We provide fully itemised, fixed-price quotations. There are no hidden extras, no surprise invoices, and no ambiguity about what is included.
We cover all building trades — from structural work and groundworks to plastering, electrics, plumbing, and decoration. One team, one contract.
We handle all Building Regulations applications and inspections on your behalf, and provide you with the completion certificate at handover.
We provide a 24-hour emergency call-out service across North London for structural damage, water ingress, fire damage, and other urgent situations.
"TCM converted our Victorian terrace loft in Walthamstow — a full dormer conversion with two bedrooms and a bathroom. The project was completed in eight weeks and the finish is outstanding. They navigated the Conservation Area planning requirements expertly."
"We had a rear extension built on our Edwardian semi in Barnet. TCM handled everything from planning to final decoration. The extension is beautifully finished and has added significant value to our home. Highly recommended."
"TCM converted our existing cellar into a home cinema and games room. The structural work was immaculate, the waterproofing is flawless, and the finish is exceptional. Two years on and not a drop of damp. Absolutely outstanding."
Contact our team today for a free, no-obligation site survey and quotation. We cover all areas of North London and North & North-East London.