Two Victorian terraced houses on a London street, one painted white and one in yellow stock brick, with bay windows
Floor plan drawings, pencil sketches of a house, a scale rule and a protractor spread across a desk
Photo: Tima Miroshnichenko / Pexels

Building regulations drawings · London Borough of Croydon

Building regulations drawings in Croydon, £695 fixed

Croydon needs a full plans application for work within 3 metres of a public sewer, and structural calculations for loft conversions and new openings. We check the sewer first, then draw the floor layouts, cross-sections and construction details the council lists.

Building regs£545 drawings + £150 survey (£695 total)
Get your fixed feeFFP-01 · Rev A
Our fixed fee£795
Council fee, paid to your council£548
Our fee + council fee£1,343
CoverageAll 33 boroughs

Householder application fee, paid to your council at submission.

Plus the Planning Portal's own charge if the application goes through the Portal: up to £149 including VAT, depending on the application type, and some types have none (source).

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or email hello@fixedfeeplans.co.uk

No obligation. Nothing is sent until you ask; your enquiry comes to us and nowhere else.

Starts at£150
Boroughs33/33
Stages5

Photo: Huy Phan / Pexels

Fixed fee, in writing

Tell us about your project

Send the postcode and what you want to build, and add photos or old plans if you have them. We reply with the fee in writing and the payment stages set out in full.

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Clay roof tiles on a pitched house roof with a black flue pipe passing through, against a blue sky
A pitched tiled roof in England: building control inspects roof work before it is closed up. Photo: Kristian Thomas / Pexels.

What Croydon Council asks of a building regulations application

From the council's Building control: Full plans and Building notices (adopted current council pages, read 25 October 2026).

  • Croydon's full plans route is for major domestic works, alterations and commercial premises and needs detailed drawings including floor layouts, cross sections and details of construction methods and materials. (source, checked 25 October 2026)
  • Structural calculations may be required if the work includes structural changes such as loft conversions, removing load bearing walls and creating openings. (source, checked 25 October 2026)
  • Croydon's building notice is aimed at minor domestic work such as chimney breast removal, re-covering a roof, a new bathroom, converting an attached garage to a habitable room, forming a through lounge or replacing windows, and can also be used for an extension or new home. (source, checked 25 October 2026)
  • A full plans application must be submitted if the building work involves building over or within 3 metres of a public sewer, or affects a building to which the Regulatory Reform (Fire Safety) Order applies. (source, checked 25 October 2026)
  • Croydon lets applicants apply and pay for both full plans and building notices online, and reminds them that building regulations approval is separate from planning permission. (source, checked 25 October 2026)

What Croydon building regulations application drawings have to show

For a Croydon loft or knock-through, the set that goes in is the one Croydon describes: floor layouts, cross sections and construction details, with the structural calculations for the new beams, steels and openings. We draw the beam positions and bearings on the plans so the calculations and the drawings agree before the council reads either.

Before choosing the route we look for the Croydon trigger: whether the extension sits over or within 3 metres of a public sewer. If it does, a building notice is not available and full plans is mandatory. For a garage conversion or a through lounge, where Croydon accepts a building notice, we still draw the construction details so your builder has them.

PS2 · at a glance

Croydon: 786 householder decisions

Croydon
Approvals, prior approvals included86.6%

681 of 786 granted. London: 85.8%.

Decided within 8 weeks95.3%

502 of 527 applications, prior approvals excluded.

Source: MHCLG PS2, 1 July 2025 to 30 June 2026. Dark tick: London.
Two hands holding a printed floor plan over a desk of drawings, with a pen and notebook beside it
Checking the drawings with you before anything goes to the council. Photo: Tima Miroshnichenko / Pexels.

What it costs in Croydon

  • Building regulations drawings: £545 drawings + £150 survey (£695 total).
  • The building control charge is set by your council or a registered building control approver.

Building regulations drawings across London · Croydon planning rules · every price

Answers

Croydon building regulations application questions

When is a full plans application mandatory in Croydon?
Croydon says it must be submitted if the building work involves building over or within 3 metres of a public sewer, or affects a building to which the Regulatory Reform (Fire Safety) Order applies. Elsewhere, minor domestic work can use a building notice. We check the sewer position first.
Do I need structural calculations for a loft conversion in Croydon?
Croydon says they may be required where work includes structural changes such as loft conversions, removing load bearing walls and creating openings. We prepare the beam and lintel calculations and draw their positions on the plans, so the calculations and the drawings agree when the council reads them.
Can I use a building notice for a garage conversion in Croydon?
Yes. Croydon lists conversion of an attached garage to a habitable room among the minor domestic works a building notice covers, along with forming a through lounge and replacing windows. The work is inspected rather than approved in advance, so we still draw the construction details for your builder.

Start with £150

Your fixed fee is already on this page.

Tell us the postcode and what you want to build. We confirm the fee in writing and book the survey.

Get my fixed fee020 7131 9703
01
Measured surveyWithin five working days
£150
02
Existing drawingsThe building as it stands
£175
03
Proposed drawingsYour scheme, revised until right
£225
04
Planning application packForms, statements, OS plans
£125
05
Submission and agent servicePortal submission, queries handled
£120
Total, planning application£795
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