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Tower Hamlets, London

Structural calculations in Tower Hamlets

Structural calculations for a Tower Hamlets home start at £295 including VAT. The borough sits on London Clay with pockets of high groundwater, and its building control prices structural alterations by cost band, so the beam, the ground and the fee are best settled together before you build.

From £295 (VAT included)

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    Steel beams supporting exposed timber floor joists on temporary props during a house renovation

    Structural calculations in Tower Hamlets: what building control charges

    Tower Hamlets files structural alterations under its Table C for internal alterations, fittings and structural alterations, banded by estimated cost with VAT included. The council's figures read: GBP 2,000-5,000: plan GBP 251 + inspection GBP 376.92 (building notice GBP 628.20); GBP 5,000-20,000: building notice GBP 1,856.60; regularisation 1.25 x building notice, no VAT; effective date not stated.

    A loft has its own table, with and without a dormer: No dormer: plan GBP 380.72 + inspection GBP 571.08 = GBP 951.79 building notice; with dormer GBP 1,363.10 building notice. A dormer costs more than a plain loft because it adds framing, and that framing is where the calculation does most of its work.

    Because the charge follows the cost of the job, the scope you give building control matters. We write the calculation so it names each beam, its bearing and its propping, which lets the officer match it to the work on site.

    Brick house being extended, with a wide new opening supported over the ground floor

    Local figures for Tower Hamlets

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Structural alterations are charged under Table C (internal alterations, fittings and/or structural alterations) by estimated cost band, VAT included.GBP 2,000-5,000: plan GBP 251 + inspection GBP 376.92 (building notice GBP 628.20); GBP 5,000-20,000: building notice GBP 1,856.60; regularisation 1.25 x building notice, no VAT; effective date not stated—towerhamlets.gov.uk, Domestic Extensions and Alterations, Table C, section 2
    Loft conversion charge without or with dormer (Table B).No dormer: plan GBP 380.72 + inspection GBP 571.08 = GBP 951.79 building notice; with dormer GBP 1,363.10 building notice—towerhamlets.gov.uk, Domestic Extensions and Alterations, Table B
    Tower Hamlets bedrock is mainly London Clay with low permeability; permeable superficial deposits can trap groundwater above the clay, giving localised elevated groundwater potential relevant to basements.London Clay Formation; localised elevated groundwater—towerhamlets.gov.uk, Level 2 SFRA, Geology and groundwater
    All basement developments must conduct a basement impact assessment showing structural stability, flood safety and no adverse hydrogeological impact, taking account of the Strategic Flood Risk Assessment. Self-contained basements without access above breach level are highly vulnerable use.All basements—towerhamlets.gov.uk, Tower Hamlets Local Plan 2031 (adopted 15 January 2020), Policy D.ES4, para 14.31, PDF p.162
    A Construction Environmental Management Plan (CEMP/SEMP) is required for all major developments and for minor works including basement developments that are likely to affect neighbours' amenity or cause obstructions or hazards on the public highway. It must cover site operatives' parking, loading/unloading, storage of plant and materials, security hoarding, wheel washing, dust and dirt control and a waste recycling/disposal scheme, to the GLA dust and emissions guidance.Basement developments (minor) and all major—towerhamlets.gov.uk, Tower Hamlets local validation list: Construction Environmental Management Plan (web page, undated), web page, 'When required' and 'Guidance' sections (unpaginated)
    Conservation areas59 named conservation areas published by the council—planning.data.gov.uk
    Article 4 directions64 Article 4 directions published by the council—planning.data.gov.uk
    Listed building entries916 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions191 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted92.7 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time95.8 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Party Wall etc. Act 1996 s6(1), s6(2), s6(5)Adjacent excavation notice at least 1 month before work: within 3 m and deeper than the neighbour's foundations, or within 6 m and cutting a 45° line from their foundations—legislation.gov.uk

    A blank value means the figure has not been published, not that there are none. Check your own address with the council.

    Councils bordering Tower Hamlets
    Building regulations, layer by layerPart A: structure: Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments. Part B: fire safety: All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604. Part L: insulation: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4. Part K: stairs: 2.0 m clear headroom over stairs. Full plans application: Building control body must decide a full plans application within 5 weeks, or longer if agreed in writingPart A: structurePart B: fire safetyPart L: insulationPart K: stairsFull plans applicationABCDE

    Building regulations, layer by layer

    The Approved Documents that shape most house projects, from structure to the application itself.

    A · Part A: structure
    Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments
    B · Part B: fire safety
    All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604
    C · Part L: insulation
    New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4
    D · Part K: stairs
    2.0 m clear headroom over stairs
    E · Full plans application
    Building control body must decide a full plans application within 5 weeks, or longer if agreed in writing

    London Clay, groundwater and basements in Tower Hamlets

    The borough's detailed Strategic Flood Risk Assessment describes the bedrock as mainly London Clay: London Clay Formation; localised elevated groundwater. Clay of that kind has low permeability, and water can be trapped in the permeable deposits above it.

    That is why the local plan treats basements seriously. The local plan's basement policy asks for a basement impact assessment on every basement development, showing structural stability, flood safety and no harm to the groundwater. The council's scope is: All basements.

    Householders on land the Environment Agency maps as medium or high flood risk face a further step. A basement or ground floor extension there needs a Flood Risk Assessment covering all forms of flooding, climate change, drainage and safe access and escape. We bring the structural levels, such as the floor and threshold heights, into that assessment so the two documents agree.

    Construction management, heritage and trees

    For minor basement work likely to affect neighbours or the public highway, the council asks for a construction environmental management plan: Basement developments (minor) and all major. Its Code of Construction Practice checklist also lists details of any planned basement works among the items to confirm. The structural sequence, with props, excavation stages and lifting, feeds directly into these documents.

    Tower Hamlets has 59 conservation areas, 64 Article 4 directions, 916 Historic England list entries and 2 World Heritage Sites. A listed building needs a Heritage Impact Statement with a schedule of works, and the council's page does not name a separate structural survey. Our calculation still records how each beam is installed, so the schedule of works describes real steps. The borough also publishes 72 tree preservation orders, so a tree near a new foundation is checked before design.

    Typical structural jobs in Tower Hamlets

    The usual jobs are structural openings between rooms, a rear extension on a terraced house, and loft conversions. Each begins with a measured survey of walls, floor build-up and anything above the opening.

    The deliverable is a calculation pack with a beam and padstone schedule and a layout drawing. It is the same set that goes to the engineer and building control, so a change made once flows to every sheet.

    How Tower Hamlets decides householder applications

    Tower Hamlets decided 191 householder applications in its latest published year, granted 92.7 per cent and decided 95.8 per cent in time. Structural calculations are not part of that figure, but it shows how householder schemes tend to move.

    Price, what you receive and where next

    Structural calculations start at £295 with VAT included, fixed before you commit. Expect the package after the survey, checked by a second chartered technologist.

    Next, our building regulations drawings in Tower Hamlets carry the beams into the submission, and structural engineering in Tower Hamlets covers complex frames. See the general service at structural calculations, the borough overview at architectural drawings in Tower Hamlets, and nearby rules in Newham and Hackney.

    What you receive

    Structural calculation sheet for a steel beam
    Sample drawing. Structural calculation for a steel beam, coordinated with the engineer.
    House extension under construction with scaffolding, new glazed doors and building materials
    Load take-down
    Brush across the bars.

    Other services in Tower Hamlets

    Structural calculations nearby

    Questions

    What does Tower Hamlets building control charge for a structural alteration?

    It charges by cost band: GBP 2,000-5,000: plan GBP 251 + inspection GBP 376.92 (building notice GBP 628.20); GBP 5,000-20,000: building notice GBP 1,856.60; regularisation 1.25 x building notice, no VAT; effective date not stated.

    Is Tower Hamlets on London Clay?

    Mostly. The borough's flood risk assessment records: London Clay Formation; localised elevated groundwater.

    How much do structural calculations cost in Tower Hamlets?

    From £295 including VAT, fixed up front, separate from the council's building control charge.

    Do all basements in Tower Hamlets need an impact assessment?

    The council's policy covers these: All basements.

    Sources and dates

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