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Portman Estate architects.
Britain's No. 1

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

Save up to 50% off design + planning costs with Resi Ready

Get build-ready in as little as four-weeks

A planning team staffed by ex-council officers

Organise your entire project from one place

Westminster planning application stats

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

Westminster

%

UK Average

%

Resi's planning consultant

Danielle Price

Former Wigan Council Planning Officer
Westminster's planning officers

Kimia Khatmian, Ernie Cheung, Morgan Cheung, Tristan Goldsmid, Max Jones, ...

25 Number of applications
8 - 259 days Submit to complete time
19 Granted applications
6 Refused applications
11w 5d Average decision time
See if you qualify for Permitted Development

We've had 19 planning applications approved in Westminster

Ground floor Rear

Cosway Street, NW1 5NR

27 Oct '20

Ground floor Rear

Cosway Street, NW1 5NR

22 Feb '21

Ground floor Rear

Cosway street, NW1 5NR

19 Jun '19

Whole house Internal alteration

Chester Street, SW1X 7BB

09 Jun '22

Whole house Internal alteration

Chester Street, SW1X 7BB

03 Oct '22

Airspace New floor

Chester Street, SW1X 7BB

30 May '22

Ground floor Internal alteration

Maida Vale, W9 1SE

09 Jan '19

Ground floor Internal alteration

Maida Vale, W9 1SE

26 Mar '19

Ground floor Internal alteration

Maida Vale, W9 1SE

12 Aug '20

Ground floor Internal alteration

Maida Vale, W9 1SE

17 Jul '19

Loft Mansard roof

Gloucester Terrace, W2 6HT

20 Apr '21

Loft Mansard roof

Gloucester Terrace, W2 6HT

19 Oct '21

First floor Internal alteration

Lapworth Court, Chichester Road, W2 6PJ

21 Sep '23

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

Average construction costs for the Portman Estate area

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

Rear

£k

Side Infill

£k

Loft

£k

First Floor

£k

Try our Construction Cost calculator

Here's just a few projects we've done near Portman Estate

Why people near Portman Estate love Resi

Over 8800 homeowners have trusted Resi with their home extensions — that’s more than any other architect in the UK.

Came across Resi in 2017 and have to say their service has been exceptional on all fronts. Prompt...

Ann

Ground floor Rear

Alexander Ell

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

Alexander

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...

Dharam

Two storey Side

Luisa Wolf

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

Luisa

Loft Main dormer

Peter Spence

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

Peter

Ground floor Rear

Resi are a great investment!

Resi have been great. We knew we needed help and saw a couple of “all in” firms before we found R...

Helena

Ground floor Rear

Patricia Ladly

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

Patricia

Loft Main dormer

STEVE BOWMAN

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

Steve

Ground floor Rear

Freddie White

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

Freddie

Whole house New build

Absolutely Brilliant!

I was recommended to use Resi by a friend of mine. I found the whole process an absolute dream. F...

Ayisha

Ground floor Side infill

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Builders we work with in Portman Estate

Home Republic Limited
4.7
7 reviews
Covers Portman Estate
39 Resi projects
My Extension PM Ltd.
4.7
17 reviews
Covers Portman Estate
112 Resi projects
Fittra Construction
Covers Portman Estate
4 Resi projects
N-Vico Ltd.
3.8
4 reviews
Covers Portman Estate
8 Resi projects
Kovacs Construction Ltd
4.0
7 reviews
Covers Portman Estate
37 Resi projects
4 You Residential Ltd
Covers Portman Estate
6 Resi projects
Check out our vetted builders
Other architects in Portman Estate

AK Studios - Architecture & Interiors, Dominic McKenzie Architects, Rubrics Architects, SSD Architecture, F Line Designs, InkArchitects, Scaleruler

Postcodes we serve in and around Portman Estate

W1H, W1, W2, WC1, WC2, EC1, EC2, EC3, EC4, NW1, NW2, NW3

Speak to an expert

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