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Derry Downs architects.
Britain's No. 1

Scadbury Park 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

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Bromley planning application stats

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



UK Average


Resi's planning consultant

Danielle Price

Former Wigan Council Planning Officer
Bromley's planning officers

John White, Manpreet Virdi, Lasse Lottgen, Nicola Taplin, Gary Wong, ...

251 Number of applications
0 - 1380 days Submit to complete time
224 Granted applications
27 Refused applications
9w 2d Average decision time
See if you qualify for Permitted Development

We've had 224 planning applications approved in Bromley

Ground floor Wraparound

Molash Road , BR5 3NX

14 Jul '20

Loft Hip to gable with main dormer

Marion Crescent , BR5 2DE

25 Mar '24

Garden Annex

Gillmans Road, BR5 4LB

16 Sep '22

Ground floor Wraparound

Lynton Avenue, BR5 2EH

26 Feb '20

Ground floor Wraparound

Lynton Avenue, BR5 2EH

25 Sep '20

Ground floor Wraparound

Lynton Avenue, BR5 2EH

29 Jun '20

Loft Hip to gable with main dormer

Lodge Crescent, BR6 0QE

05 Apr '22

Loft Hip to gable with main dormer

Lodge Crescent, BR6 0QE

14 Apr '22

Ground floor Side

Poverest Road, BR5 2DQ

26 Jun '20

First floor Balcony

Friar Road, BR5 2BP

04 Apr '23

Loft Main dormer

Amherst Close, BR5 2HH

08 Apr '24

Ground floor Rear

Court Road, Orpington KENT, BR6 0PY

26 Jan '22

Ground floor Wraparound

Oakdene Rd, BR5 2AP

04 Aug '22

Ground floor Rear

Avalon Road, BR6 9AX

14 May '19

Ground floor Rear

Lancing Road, BR6 0QX

18 Feb '22

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

Average construction costs for the Derry Downs area

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



Side Infill




First Floor


Try our Construction Cost calculator

Here's just a few projects we've done near Derry Downs

Sidney Road

Sidney Road

Ground floor wraparound
Loft main dormer
Completed 2021
Planning authority Bromley

Elwill Way

Elwill Way

Completed 2022
Planning authority Bromley

The Penge House

The Penge House

Ground floor side and rear
Completed 2023
Planning authority Bromley

Why people near Derry Downs love Resi

Over 8400 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…

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


Ground floor Rear

Alexander Ell

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


Loft Main dormer

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

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...


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

Absolutely Brilliant!

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


Ground floor Side infill

Sarah Boothe

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


Ground floor Side and rear

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.

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

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Builders we work with in Derry Downs

Home Republic Limited
7 reviews
Covers Derry Downs
39 Resi projects
My Extension PM Ltd.
17 reviews
Covers Derry Downs
106 Resi projects
N-Vico Ltd.
3 reviews
Covers Derry Downs
8 Resi projects
Kovacs Construction Ltd
7 reviews
Covers Derry Downs
31 Resi projects
Lifestyle London Design & Build Ltd
2 reviews
Covers Derry Downs
7 Resi projects
D2D Projects Limited
2 reviews
Covers Derry Downs
7 Resi projects
Check out our vetted builders
Other architects in Derry Downs

Smoove Build, Robert Potz Architects, Sophie McManus Architecture, FJ Urban Planning, Quote Builders Ltd, Homestead - The Planning & Building Regulations Company LTD, Brooks Architecture and Interior Design

Postcodes we serve in and around Derry Downs

BR6, BR7, SE1, SE2, SE3, SE4, SE5, SE6, SE7, SE8, SE9, SE10

Speak to an expert

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