A rendered rear extension opening onto a mature garden

North London, Mill Hill

Bespoke home builders inMill Hill

Good plots, strong values and whole house reinventions.

Federation of Master Builders
25 years, 100+ homes
Working in Mill Hill and nearby
10 year structural warranty

Building in Mill Hill

What working in Mill Hill actually involves

Mill Hill has some of the largest suburban plots in north London, particularly around Mill Hill Village and the roads off the Ridgeway, which makes serious extension and replacement dwelling work worthwhile.

Most of our briefs here are whole house: extend, remodel, re-service and landscape together, so the finished home reads as one design.

Local detail

Planning authority
London Borough of Barnet
County
North London
Also covering
Totteridge, Hampstead, Highgate, Finchley, Barnet
Check your planning route

Planning

Planning policy in Mill Hill

The constraints we test before design begins, not after a refusal.

  • The London Borough of Barnet determines applications and applies its residential design and extensions guidance.
  • Mill Hill Village and Moat Mount conservation areas control materials, roof form and frontage changes.
  • Green Belt land to the north limits new plots and favours replacement dwellings.
  • Barnet's basement policy applies to excavation, with party wall awards needed on most attached and closely spaced houses.
  • Sloping plots off the Ridgeway suit lower ground floors, which are usually cheaper than a full basement dig.

What we build here

The projects that suit Mill Hill

Guide costs, planning routes and worked examples for each.

Wrap-Around Extensions

£2,300 to £3,100 typical cost per m²

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Double Storey Extensions

£2,400 to £3,000 typical cost per m²

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Guidance

Useful reading before you start

Costs

How Much Does a House Extension Cost in 2026?

Read the guide

Costs

How Much Does a Basement Conversion Cost?

Read the guide

Planning

Do You Need Planning Permission for an Extension?

Read the guide

FAQs

Mill Hill questions, answered

Allow £1,900 to £2,800 per square metre for a well specified conversion, with dormer and mansard work at the upper end. Structure and stair position drive the figure.

Nearby

Other towns we work in across North London

Next step

Planning a project in Mill Hill?

Answer four questions and see an indicative range for your project. It takes under a minute and it is always step one.