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Northwood architects.
Britain's No. 1

Northwood Grange may be popular, but wait until people see your new home extension, designed by Trustpilot's highest-rated UK architectural practice.

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A planning team staffed by ex-council officers

Organise your entire project from one place

Hillingdon planning application stats

Our planning permission win rate for the Hillingdon area is as follows:



UK Average


Resi's planning consultant

Jordan Macann

Former Wandsworth Council Planning Officer
Hillingdon's planning officers

Mitchell Heaven, Eoin Concannon, Helen Harris, Benjamin Hicks, Niamh McMenamin, ...

84 Number of applications
15 - 301 days Submit to complete time
76 Granted applications
8 Refused applications
8w 6d Average decision time
See if you qualify for Permitted Development

We've had 76 planning applications approved in Hillingdon

Whole house Internal alteration

Ashurst Close, HA6 1EL

11 Aug '20

Ground floor Wraparound

Roy Road, HA6 1EH

31 Oct '22

First floor Side

Watford Rd, HA6 3NT

21 Sep '23

Ground floor Rear

Addison Way, HA6 1SY

16 Nov '22

Ground floor Rear

Addison Way, HA6 1SY

19 Aug '22

Garage Conversion

Hillside Road, HA6 1QA

27 May '22

Garage Conversion

Hillside Road, HA6 1QA

06 Jun '22

Ground floor Internal alteration

Tolcarne, HA5 2DG

20 Jan '21

Ground floor Rear

Ashridge Drive, WD19 6UQ

24 Oct '19

Ground floor Internal alteration

Joel Street, HA5 2PJ

15 Sep '21

Ground floor Rear

Buckland Rise , HA5 3QS

20 May '21

Ground floor Internal alteration

Burnley Close, WD19 6YS

13 Jan '23

Loft Main dormer

Larkswood Rise, HA5 2HH

18 Dec '19

The above are all actual Resi projects in and around Hillingdon. Projects have been anonymised in accordance with GDPR data regulations.

Average construction costs for the Northwood area

In the last year, the construction costs we've seen for the Northwood area are as follows:



Side Infill




First Floor


Try our Construction Cost calculator

Here's just a few projects we've done near Northwood

Why people near Northwood love Resi

Over 8400 homeowners have trusted Resi with their home extensions — that’s more than any other architect in the UK.

Alexander Ell

Used to do initial design phase for a loft conversion and internal remodelling. Very helpful in t...


Loft Main dormer

The best out there

I have been with Resi now for over a year and they have looked after me well. They have helped me...


Two storey Side

Luisa Wolf

The planning permission (1st of that kind on my neighbourhood) for the extension of my house was...


Loft Main dormer

Peter Spence

So easy! Previous experience with face to face architect not great. But Resi are so easy to deal ...


Ground floor Rear

Patricia Ladly

I had my reservations about getting design plans on-line but the whole process has been very prof...


Loft Main dormer


Very impressed with the service and the attention to detail to my requirements. the team were ver...


Ground floor Rear

Freddie White

Great service, easy to use and very fast results, highly recommend. Easy process from start to fi...


Whole house New build

100% recommend Resi to help you through the struggles

Resi were a breathe of fresh air to work with. They are responsive, proactive, knowledgable and h...


Ground floor Side

Sarah Boothe

would highly recommend this company, worked with Alessio on our planning application for our rea...


Ground floor Side and rear

I could not be happier with the services provided by Resi, very professional, and extremely helpf...


Loft No dormer

You'd be with the numero uno in architecture category on Trustpilot

Be more likely get an 'A-okay' with our 90% planning approval rating.

A dedicated Account Manager to help you through the process's more stressful moments

Keep your project on time & budget with our project management app

Screen-share with your designer, rather than inconvenient home visits

Get intro'd to vetted builders who've been around the (extension) block before

We use bleeding-edge new tech like laser scanners and 3D modelling software

Receive a premium service at an affordable price thanks to our proprietary technology & processes

Builders we work with in Northwood

Home Republic Limited
7 reviews
Covers Northwood
39 Resi projects
Fittra Construction
Covers Northwood
4 Resi projects
N-Vico Ltd.
3 reviews
Covers Northwood
8 Resi projects
Kovacs Construction Ltd
7 reviews
Covers Northwood
31 Resi projects
4 You Residential Ltd
Covers Northwood
6 Resi projects
Lifestyle London Design & Build Ltd
2 reviews
Covers Northwood
7 Resi projects
Check out our vetted builders
Other architects in Northwood

Kwork Architects, Middlesex & Herts Architectural Services, F Line Designs, KevCADs, The Plan Hub, The Planning Man, Chiltern Architectural Services

Postcodes we serve in and around Northwood

HA6, HA7, HA8, HA9, UB1, UB2, UB3, UB4, UB5, UB6, UB7, UB8

Speak to an expert

We’re always up for 30 min phone consultations to help you with your project.