Barnet · NW7
Mill Hill Architects
Bespoke, design-led architects working across Mill Hill (NW7). We deliver contemporary extensions, whole-house renovations and new build homes tailored to the streets and planners of Mill Hill.
Reviewed by Dor Cohen, RIBA Chartered Architect, ARB Registered
How can an architect help with your project in Mill Hill?
DOR Architects tests what your Mill Hill 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
Want us to send you information?
Occasional case studies, planning notes and design ideas from our Mill Hill projects.
Architecture in Mill Hill
What homes and buildings are typical in Mill Hill?
Period terraces and semis around Mill Hill centre
Post-war infill closer to the NW7 boundary
Larger detached stock on the leafy northern edge
Mixed-use frontages along the main high street
Planning
What should you know about planning in Mill Hill?
London Borough of Barnet planners are focused on suburban character, garden depths, and rear-extension precedent under Barnet's Residential Design Guidance SPD.
Neighbour amenity
Overlooking, daylight and sunlight typically tested at two-storey work.
Garden depth policy
Local SPDs set clear expectations on rear-extension projection.
Trees & TPOs
Mature street trees and TPOs shape foundations and consent.
Party wall matters
Most side-return and rear-extension projects trigger party wall notices — flagged upfront.
Materiality
We tune brick, render and joinery to sit calmly within the existing streetscape.
Lifestyle, sustainability & value uplift
Will a well-designed project add value to your home?
Lifestyle
Family-first spaces that flex from quiet mornings to Friday-night hosting — with real indoor-outdoor connection.
Sustainability
Fabric-first upgrades, MVHR-ready detailing and low-carbon materials baked in from Stage 2.
Value uplift
Well-considered extensions consistently outperform local price-per-sq-ft on resale.
Case study
What have we delivered?
Phoenix Canoe Club: a waterfront community building where we secured the main planning permission, followed by a separate application for the slipway and a current fencing and parking proposal.
See the projectOur services process
How does the design process work?
Feasibility
Site appraisal, planning strategy and a costed brief within four weeks.
3D Design
BIM-led concept and options tested in three dimensions from day one.
Planning
Full planning submission with Design & Access statement and neighbour consultation.
Technical
Tender-ready technical package and on-site support through completion.
Why choose DOR
Why choose DOR Architects in Mill Hill?
- 3D / BIM-led design from the first sketch
- Comprehensive support from brief through completion
- Deep planning experience across London & Herts
- Transparent, stage-based fees — no hourly billing
- A small, senior team — you work with the principals
- Sustainability considered from Stage 1, not bolted on
Questions
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.