The old Poplar Town Hall, a Victorian yellow-brick civic building with a domed corner tower, pale stone bands and tall arched windows, on a sunny day
Floor plan drawings, pencil sketches of a house, a scale rule and a protractor spread across a desk
Photo: Tima Miroshnichenko / Pexels

Flood risk assessment · London Borough of Tower Hamlets

Flood risk assessment in Tower Hamlets, from £375 fixed

Tower Hamlets asks for a flood risk assessment in Flood Zones 2 and 3 when the work is a new build, a basement or a ground floor extension. A loft or upper-floor extension is not on that list. Where one is needed, the council expects it to cover drainage design and a safe way in and out too.

Flood risk assessmentfrom £375
Get your fixed feeFFP-01 · Rev A
Our fixed feefrom £375
Council fee, paid to your councilNone
Total, our feefrom £375
CoverageAll 33 boroughs
Get this fee in writing

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: Doyle of London / Wikimedia Commons, CC BY-SA 4.0

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.

Ask for your fixed fee in writing

Name and email are required. Everything else helps us price it, but is optional.

Your enquiry goes to us and nowhere else. It is never syndicated or sold. See our privacy notice.

A red clad outbuilding with a white window standing in brown floodwater among bare trees
Flood-resistant materials are specified to a height above the estimated flood level. Photo: Serge Lavoie / Pexels.

What Tower Hamlets Council asks of a flood risk assessment

From the council's Local validation list: Flood Risk Assessment (FRA) (adopted current list, read 29 October 2026).

  • Tower Hamlets requires a flood risk assessment for all applications in Environment Agency Flood Zone 2 or 3 relating to new builds and basement or ground floor extensions. (source, checked 29 October 2026)
  • The assessment should identify and assess all forms of flooding to and from the development, show how they will be managed with climate change taken into account, and identify opportunities to reduce the probability and consequences of flooding. (source, checked 29 October 2026)
  • It should include the design of surface water management, including sustainable drainage systems, and address safe access to and from the development in areas at risk of flooding. (source, checked 29 October 2026)

What Tower Hamlets flood risk assessment drawings have to show

In Tower Hamlets the type of work decides the requirement as much as the flood zone. A ground floor or basement extension in Flood Zone 2 or 3 needs the assessment; a loft conversion or an upper-floor extension on the same house is not in the list, and we tell you so rather than sell you a report.

Where one is needed, it carries the drainage for the new roof and paving, and a route out of the house to dry ground, since the council asks for both inside the same document.

PS2 · at a glance

Tower Hamlets: 191 householder decisions

Tower Hamlets
Approvals, prior approvals included92.7%

177 of 191 granted. London: 85.8%.

Decided within 8 weeks92.7%

101 of 109 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 Tower Hamlets

  • Flood risk assessment: from £375.

Flood risk assessment across London · Tower Hamlets planning rules · every price

Flood risk assessment · Tower Hamlets

What happens next in Tower Hamlets

We check your address on every map the council uses, take the flood level with climate change, set the floor level and resilience measures, and mark them on the drawings.

Photo: Helena Jankovičová Kováčová / Pexels

Answers

Tower Hamlets flood risk assessment questions

Does my loft conversion in Tower Hamlets need a flood risk assessment?
Not under the council's local validation list, which asks for one in Flood Zones 2 and 3 for new builds and basement or ground floor extensions. An upper-floor extension or loft conversion is not in that list. We confirm the flood zone and the type of work before quoting, and say plainly if you do not need one.
What does Tower Hamlets want a flood risk assessment to include?
An assessment of all forms of flooding to and from the development, how they will be managed with climate change, and opportunities to reduce the risk. It should also include the design of surface water management, including sustainable drainage, and safe access to and from the development where the area is at risk of flooding.

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
Get my fixed fee