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Blackfen architects.
Britain's No. 1

The Oval 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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Bexley planning application stats

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



UK Average


Resi's planning consultant

Jordan Macann

Former Wandsworth Council Planning Officer
Bexley's planning officers

Michele Katzler, Luke Tassell, Racheal Osinuga, Maya Elmi, Russell Smith, ...

98 Number of applications
28 - 223 days Submit to complete time
92 Granted applications
6 Refused applications
8w 4d Average decision time
See if you qualify for Permitted Development

We've had 92 planning applications approved in Bexley

Loft Main dormer

Burnt Oak Lane, DA15 8LN

09 Jun '21

Ground floor Internal alteration

Yorkland Avenue, DA16 2LN

08 Sep '20

Ground floor Rear

Birch Grove, DA16 2JW

01 May '19

Two storey Rear

Ridgeway West, DA15 8SE

14 Dec '18

Ground floor Rear

Rowanwood Avenue , DA15 8WL

28 Apr '23

Two storey Side

Rainham Close, SE9 2JB

11 Dec '20

Two storey Side

Rainham Close, SE9 2JB

10 Jun '19

Two storey Side

Lancelot Road, DA16 2HX

04 Sep '20

Ground floor Wraparound

Cornwall Avenue, DA16 2PR

12 Sep '22

Ground floor Rear

Westmoreland Avenue, DA16 2QD

19 Mar '19

Ground floor Rear

Westmoreland Avenue, DA16 2QD

30 Oct '18

Ground floor Rear

Cavendish Avenue, DA16 2EP

19 Feb '21

Ground floor Front

Holland Gardens, SE9 2AY

05 Dec '23

First floor Side

Lamorbey Close, DA15 8BA

06 Apr '21

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

Average construction costs for the Blackfen area

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



Side Infill




First Floor


Try our Construction Cost calculator

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

Longlands Road

Longlands Road

Ground floor wraparound
Completed 2021
Planning authority Bexley

Why people near Blackfen 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 say their service has been exceptional on all fronts. Prompt...


Loft Hip to gable with main dormer

Alexander Ell

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


Ground floor 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

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.

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

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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 Blackfen

Home Republic Limited
7 reviews
Covers Blackfen
39 Resi projects
My Extension PM Ltd.
17 reviews
Covers Blackfen
106 Resi projects
N-Vico Ltd.
3 reviews
Covers Blackfen
8 Resi projects
Kovacs Construction Ltd