Barnet · N3
Bespoke, design-led architects working across Finchley (N3). We deliver contemporary extensions, whole-house renovations and new build homes tailored to the streets and planners of Finchley.
Reviewed by Dor Cohen, RIBA Chartered Architect, ARB Registered

DOR Architects tests what your Finchley property or site can achieve, designs a scheme that suits Barnet Council's planning policies, and prepares the drawings for approval and building. Our construction and development background keeps designs buildable and on budget, reducing the risk of refusals and costly redesigns.
Contents
Newsletter
Occasional case studies, planning notes and design ideas from our Finchley projects.
Architecture in Finchley
Period terraces and semis around Finchley centre
Post-war infill closer to the N3 boundary
Larger detached stock on the leafy northern edge
Mixed-use frontages along the main high street

Planning
London Borough of Barnet planners are focused on suburban character, garden depths, and rear-extension precedent under Barnet's Residential Design Guidance SPD.
Planning a home project in Finchley? Our house extension and loft conversion architects can help, or you can check whether your extension needs planning permission first.
Overlooking, daylight and sunlight typically tested at two-storey work.
Local SPDs set clear expectations on rear-extension projection.
Mature street trees and TPOs shape foundations and consent.
Most side-return and rear-extension projects trigger party wall notices — flagged upfront.
We tune brick, render and joinery to sit calmly within the existing streetscape.
Lifestyle, sustainability & value uplift

Rooms that suit real life: quiet breakfasts, homework at the big table, friends round on a Friday. And a proper link to the garden.
We think about warmth and energy bills from the first sketch: good insulation, sensible glazing and materials that last. Not bolted on at the end.
A home that works well is easier to love now and easier to sell later. Good design is usually the best-value part of the whole project.
Case study
Phoenix Canoe Club: a waterfront community building that achieved planning permission.
See the projectServices in Finchley
Our services process
Site appraisal, planning strategy and a costed brief within four weeks.
Concept and options tested in three dimensions from day one.
Full planning submission with Design & Access statement and neighbour consultation.
Tender-ready technical package and on-site support through completion.
Why choose DOR
Everything you need to know about working with DOR Architects.
Many single-storey rear extensions fall under permitted development, but flats, conservation areas, Article 4 areas and larger or two-storey schemes usually need full planning permission. We check your address against local policy before you spend money on drawings.
Yes — we work across north London and Hertfordshire and design every scheme around the local council's policies and design guidance.
First sketch to completion is typically 12–18 months — 3–4 months design, 8–10 weeks for planning, then 6–9 months on site.
We keep a small, vetted list of contractors who consistently deliver in the area — we'll introduce you at Stage 3.
Transparent stage-based fees, shared as a fixed proposal after our first meeting — no hidden hourly billing.