Start a project ↗ARCHITECTURAL SERVICES · BARNET
Architects for Barnet, from suburb to garden suburb.
Extensions, loft conversions, flat and HMO conversions, listed buildings and every type of planning application — designed and submitted to London Borough of Barnet by a London practice with nearly two decades of planning experience.
Call 0203 026 2883 ↗
Planning in Barnet
Barnet is London's most populous borough — and one of its most design-conscious.
Barnet's housing ranges from interwar semis and Edwardian terraces to the Arts and Crafts streets of Hampstead Garden Suburb. Barnet Council applies its residential design guidance closely, so the size, roof form and materials of an extension matter as much as the floor area. We design to that guidance from the first sketch, which is why our Barnet schemes go in ready to be approved.
Where we work in Barnet
Finchley, East Finchley, Hendon, Golders Green, Edgware, Mill Hill, Whetstone, Totteridge, High Barnet, New Barnet, Colindale, Cricklewood, Friern Barnet and Hampstead Garden Suburb.
What to know before applying
Barnet has 16 conservation areas, and Hampstead Garden Suburb has its own Trust whose consent is needed in addition to planning permission. Article 4 directions remove permitted development rights in several areas, and the borough has an Article 4 direction controlling conversions of family houses into small HMOs. We check every designation on your address before design starts.
Extensions & loft conversions
Single and double storey rear extensions, wraparounds, hip-to-gable and rear dormer lofts are the most common Barnet projects. Barnet's guidance limits depth, height and dormer bulk to protect neighbours on semi-detached streets — we design to those limits and use the prior approval larger home extension route where it gets you more space.
Conversions, HMOs & change of use
Flat conversions and HMOs need careful handling in Barnet: the borough protects family-sized homes and applies space standards strictly. We assess viability, licensing and policy up front so you know whether a scheme is realistic before you pay for full drawings.
Refused by Barnet Council?
Send us the decision notice and drawings. We review the officer's reasons and give you a straight answer: which changes would make the scheme approvable, whether an appeal is worth pursuing, or whether the honest advice is that the project is a no-go on this site. We prepare resubmissions and manage appeals to the Planning Inspectorate.
Planning permission across London →
Official sources for Barnet planning
- Barnet Council planningLondon Borough of Barnet — applications, policy and guidance
- Planning PortalThe official planning application service for England and Wales
- National Heritage ListHistoric England — check whether a building is listed
- National Planning Policy FrameworkMinistry of Housing, Communities & Local Government

“In Barnet, approval comes from respecting the street — we design extensions the council recognises as good neighbours.”
Begin a conversation
Have a property in mind?
Tell us a little about your project and we will come back to you within one working day. Prefer to talk? Call us, or email anytime.
info@simplicity-designs.co.uk ↗







