London Borough of Barnet
Planning & Conservation in Barnet
The London Borough of Barnet includes Hampstead Garden Suburb, among the most tightly controlled residential areas in London. We design sensitively and navigate both Barnet planning and the Suburb Trust’s scheme of management — two separate tracks.
Hampstead Garden Suburb, within the London Borough of Barnet, is a planned Arts-and-Crafts community of international significance. Two layers of control apply: it is a designated conservation area under Barnet as local planning authority, and the Hampstead Garden Suburb Trust operates a private scheme of management requiring its own consent for many external works — in addition to any planning permission.
Trust approval does not replace planning permission, and planning permission does not replace Trust consent. The practical process is one measured design model feeding both packs, sequenced so a contractor is not appointed against half-consent. The Trust publishes design guidance covering repairs, alterations, extensions, trees and gardens.
We design to the Suburb’s exacting standards — subordinate extensions, careful materials and roof forms — and coordinate Barnet applications with Trust submissions. Confirming exactly which controls apply to a property is always the essential first step.
How planning works here
London Borough of Barnet: process for homeowners
Barnet includes Hampstead Garden Suburb, where Barnet planning permission and Hampstead Garden Suburb Trust consent often both apply — two separate approval tracks, not one.
Householder process
1. Is the property in Hampstead Garden Suburb?
If yes, treat Trust approval as a parallel regime to Barnet planning. The Hampstead Garden Suburb Trust publishes design guidance and controls many external works under its scheme of management. Trust consent does not replace planning permission, and planning permission does not replace Trust consent.
2. Confirm Barnet designations
Conservation area status, Article 4 directions (including those associated with HGS), listing, and planning history. Barnet is the local planning authority; the Trust is not a substitute decision-maker for planning.
3. Design to Suburb grain or ordinary Barnet policy
In HGS, materials, roof forms, hedges, front boundaries and subordinate extensions are tightly controlled. Outside the Suburb, standard householder design and amenity tests apply, still street-specific where CAs exist.
4. Sequence both packs
Prepare one measured design model that can feed Barnet drawings and Trust application materials. Programme both lead times so a builder is not appointed against half-consent.
Project types & evidence
Extensions in Hampstead Garden Suburb
Expect character-led, subordinate design. Large dominant rear boxes and unsympathetic roof changes are hard to support. Use Trust design guidance early, not after planning drawings are frozen.
Extensions elsewhere in Barnet
More conventional householder assessment: depth, height, amenity, design quality. Still confirm CA and PD for the pin.
Dual-regime risk
The common failure mode in HGS is obtaining one consent and discovering the other body will not accept the same design. Align Trust and Barnet requirements before production drawings.
Packages
Barnet householder/full application drawings as usual; Trust packs may need additional elevational and material detail. Keep both packages consistent.
Official sources used on this page
Policy and Article 4 maps change. Confirm designations for your exact address on the council’s live planning map before relying on any general description.
Areas we cover
Prime neighbourhoods in Barnet
Barnet
Architects in Hampstead Garden Suburb
Hampstead Garden Suburb is among the most tightly controlled residential areas in London. We design sensitively and navigate both the conservation area and the Suburb’s scheme of management.
View areaBarnet
Architects in East Finchley
Architecture, interior design and planning for East Finchley’s Edwardian terraces and 1930s semis — affordable, well-designed extensions and lofts.
View areaBarnet
Architects in Finchley
Architecture, interior design and planning for Finchley’s interwar semis and Edwardian homes across N3 and N12 — practical extensions and loft conversions.
View areaBarnet
Architects in Golders Green
Architecture, interior design and planning for Golders Green’s Edwardian and interwar houses and mansion flats — extensions, lofts and refurbishments.
View areaPlanning in Barnet: FAQs
Do I need Trust approval as well as planning permission in the Suburb?
When did Hampstead Garden Suburb’s Article 4 direction take effect?
Planning a project in Barnet?
Send us the address, property type and a short description of the work. We will advise whether you are likely to need planning drawings, building regulations drawings, listed building advice or leasehold approval drawings.