Barnet is London’s most populated borough, stretching from the Arts and Crafts streets of Hampstead Garden Suburb to the 1930s semi-detached suburbs of Finchley, Mill Hill and High Barnet. That scale means housing stock, and the planning rules that come with it, can look quite different from one part of the borough to the next.
What We Do
Our Building Services in Barnet
Every service below is delivered by our own in-house tradespeople, fixed-price and fully insured, right across Barnet.
Loft Conversions in Barnet
Dormer, mansard, hip-to-gable and Velux loft conversions across London, built to a fixed price and full Building Control sign-off.
Learn more →House Extensions in Barnet
Rear, side return, wraparound and double storey extensions designed and built to fit seamlessly with your London home.
Learn more →Basement Conversions in Barnet
Cellar conversions, basement lowering and full new excavations, engineered and waterproofed to BS 8102 by our in-house team.
Learn more →Garage Conversions in Barnet
Integral, attached and detached garage conversions into bedrooms, offices and annexes, most without planning permission.
Learn more →Property Refurbishment in Barnet
Cosmetic updates through to full structural refurbishments, managed under one dedicated site manager from start to finish.
Learn more →General Building in Barnet
Repointing, roof repairs, damp treatment, brickwork and small structural alterations, carried out by our own trades.
Learn more →Design & Build in Barnet
One team, one contract, one fixed price for design, planning, structural engineering and construction on your project.
Learn more →New Builds in Barnet
New homes and replacement dwellings built from foundation to final finish, with zero-rated VAT on construction costs.
Learn more →Commercial Building in Barnet
Office, retail and restaurant fit-outs across London, delivered around your trading hours with minimal disruption.
Learn more →Residential Building in Barnet
The full range of residential building work, from a single repair to a new build, delivered by one London contractor.
Learn more →Building Demolition in Barnet
Safe, fully licensed demolition work across London, from internal wall removal to complete house demolition ahead of a new build.
Learn more →Why Choose Us
Why Choose Us in Barnet
One Site Manager, Start to Finish
You get a single dedicated site manager for the whole of your Barnet project, not a rotating cast of subcontractors passed between agencies.
Fixed-Price Quotes
Every quote is itemised and fixed against a proper site survey, so the price we agree with you in Barnet is the price you actually pay.
Our Own In-House Trades
Bricklayers, carpenters, electricians and plumbers all work for us directly, which is why our schedule holds up on site in Barnet.
Local Planning Knowledge
We know Barnet Council's conservation areas, Article 4 directions and design guidance, so your Barnet project starts on the right planning route.
Local Knowledge
Building & Planning Considerations in Barnet
Barnet has around 16 to 20 conservation areas, with Hampstead Garden Suburb and Monken Hadley carrying some of the tightest design controls anywhere in the borough. Outside these protected pockets, Barnet's dominant 1930s semi-detached housing stock generally keeps full permitted development rights for rear extensions and loft conversions, and the council publishes a Residential Design Guidance SPD setting out expected depths, heights and materials for extensions across the wider borough.
Every quote we provide for a Barnet property starts with a check against Barnet Council's conservation area maps and Article 4 register, so you know exactly which route your project needs before any design work begins.
Areas We Cover
Areas We Cover in Barnet
Finchley
Mill Hill
High Barnet
Hampstead Garden Suburb
Whetstone
Edgware
Totteridge
New Barnet
Don't see your street listed? We cover the whole of Barnet and the surrounding area — get in touch to check.
Our Work
Recent Barnet Projects
A look at recent work carried out for clients in and around Barnet.
Full House Rewire & Consumer Unit Upgrade
A complete rewire and 18th Edition consumer unit upgrade for a London flat, tested, certified, and signed off with a full Electrical Installation Certificate.
View Project →
Family Bathroom Renovation
A dated bathroom stripped back and rebuilt with full tanking, marble-effect tiling, underfloor heating, and a walk-in shower enclosure.
View Project →What Clients Say
Reviews from Barnet
“Alpha converted our loft into two bedrooms and a bathroom without a single hiccup. They turned up when they said they would, kept the site tidy, and the finish is better than we hoped for.
”
Priya Shah
Loft Conversion, Walthamstow
Common Questions
FAQs for Barnet Homeowners
Is it harder to extend a house in Hampstead Garden Suburb?
Yes. Hampstead Garden Suburb is one of Barnet's most tightly controlled conservation areas, and many properties there are also subject to a private Scheme of Management in addition to the council's planning requirements, so we always check both before designing anything.
How quickly can you start a project in Barnet?
Once your survey is complete and any required planning approval is granted, most projects in Barnet start on site within 2 to 4 weeks, subject to our current schedule.
Do you handle planning permission and Building Regulations in Barnet?
Yes. We manage the full planning and Building Regulations process for Barnet projects, including liaising with Barnet Council where a planning application is required.
Do I need to get multiple quotes before choosing a builder in Barnet?
It is always sensible to compare quotes, but make sure you are comparing fixed, itemised prices based on a proper site survey rather than rough estimates, since these rarely match the final bill.
Ready When You Are
Get a Quote for Your Barnet Building Project
Free site survey, a fixed-price quote within 48 hours, and one team from first fix to final handover.
Get My Free Quote →