Serving London · Online

Home extension plans in London.

Arkiplan is an online architectural design service for London homeowners — the practical alternative to a traditional high-street architect. Planning drawings, building regs and structural work, designed with you over video and delivered at a fixed price.

Book a free design call
Fixed priceAgreed up front, no percentage fees
London & beyondRemote design, your local council
We handle planningSubmitted, chased and answered

Planning drawings & extensions in London

London homes are typically Victorian and Edwardian terraces and conversions, where side-return extensions, rear extensions and loft conversions add the most usable space. The catch is density: London has a very high concentration of conservation areas and Article 4 Directions, which remove permitted development rights street by street.

That makes checking your specific address essential before assuming you can build under permitted development. We work out your route first, design with you over video, and submit to the right borough — so you are not guessing at the rules.

There is no single “London Council” — your application goes to your local borough, one of 33 authorities plus the City of London. We identify the correct one and submit on your behalf.

What we do for London homeowners

Whatever your project, it is designed and submitted the same simple way — from wherever you are.

What we design

  • Rear, side & wrap-around extensions
  • Loft conversions & dormers
  • Garden rooms & outbuildings
  • Garage conversions & new builds
  • Planning & permitted-development applications
  • Building regulations drawings & structural calculations

How it works from anywhere

  • One 3D Home Scan™ of your property — the only visit needed
  • Design on video with your designer, evenings included
  • We draw & submit planning and building-regs applications
  • We handle your council — queries, chasing, the decision
  • One fixed price, agreed up front from your free call

London planning & extensions FAQ

Do you cover London?

Yes. Arkiplan is an online architectural design service working across England and Wales, including London and the surrounding area. Your design is done over video, with a single 3D Home Scan of your property.

Which council handles my London planning application?

There is no single “London Council” — your application goes to your local borough, one of 33 authorities plus the City of London. We identify the correct one and submit on your behalf.

Do I need planning permission for an extension in London?

It depends on the size and your property. Many single-storey rear extensions are permitted development, but London has an unusually high number of conservation areas and Article 4 Directions that remove those rights, so it pays to check. We confirm exactly which route applies to your address before drawing anything.

Do you visit homes in London?

We arrange one 3D Home Scan of your property to capture it accurately. Everything after that — design calls, drawings and submission — is handled remotely, so you do not need to take time off for office visits.

How much does it cost in London?

The price is the same wherever you are — a single fixed price agreed up front, with no percentage-of-build-cost fees. Use the instant price tool for a tailored range in about 45 seconds.

Do you handle building regulations in London?

Yes — we produce building regulations drawings and coordinate structural calculations to England standards, and submit to building control on your behalf.

Get your London project priced in 45 seconds.

No call required, no card required — just a tight, fixed-price range tailored to your project, with the planning route confirmed for your address.

Book a free design call

This page is general information, not planning advice. Permitted development and planning rules depend on your specific property and local authority and can change. We confirm the current position for your address as part of every project.