Chartered structural engineer calculations for residential schemes at any address in this borough: wall removals and steel beams, lintels, pad foundations, loft floors, underpinning. Written to the Eurocodes and formatted so Building Control can accept them without a covering letter.
Whenever a load path changes, and on any underpinning next to a neighbour — which also triggers a party wall notice under section 6 with one month’s notice. Building control decides a full plans application in five weeks, extendable to two months by agreement.
| Work | Calculations required | Also triggers |
|---|---|---|
| Removing a load-bearing wall | Yes | — |
| Forming an opening in a rear wall | Yes | — |
| Underpinning within 3m of a neighbour | Yes | Party Wall notice, 1 month |
| Rear dormer cutting roof rafters | Yes | — |
| Loft floor to habitable use | Yes | 1.5 kN/m² imposed load |
| Full plans decision period | — | 5 weeks, or 2 months by agreement |
Sources: the Building Regulations 2010 (as amended), Schedule 1 Part A and regulation 14; Approved Document A; BS EN 1991-1-1 with its UK National Annex; the Party Wall etc. Act 1996, section 6(1). Read at 1 September 2026. Haringey approved 89.5% of the householder applications it decided in the twelve quarters to March 2026 (MHCLG PS1 and PS2), which is a planning figure and says nothing about building control.
In Haringey a structural calculations package is the engineering half of a submission — beam and lintel design, foundations, loft floors — issued next to existing and proposed plans, elevations, and sections drawn at 1:50 and 1:100, which together are what London Borough of Haringey needs in order to determine an application. It is worth knowing where the planning half can end up. This council decided 4,430 applications over twelve consecutive quarters ending March 2026 and refused 628 of them; separately, 885 appeals against the authority reached a Planning Inspectorate decision and 262 of those were allowed. Read it as what it is rather than as an approval rate: only owners already refused, and willing to keep going, ever appeal at all. What it does say is that roughly three in ten of the schemes worth fighting for came back the other way, while a further 272 appeals closed without any decision at all. The first decision is rarely the last word. It is only the cheapest one to get right. Source: Planning Inspectorate appeal decisions
Prepared and reviewed by the chartered technologist team at Architectural Drawings London — MCIAT chartered, £2m PI insured.Last reviewed 2026-08-03.
Chartered structural engineer calculations for every residential intervention in Haringey — steel beams, lintels, pad foundations, wall removals, loft floor joists, underpinning. Eurocode-compliant, Building Control-ready.
Housing stock in Haringey: Edwardian terraces in Crouch End, Muswell Hill; Victorian two-up-two-downs in Harringay Ladder; 1930s semi-detached in Muswell Hill; post-war in Tottenham.
Character: Muswell Hill and Crouch End have strong conservation coverage with clear loft/mansard precedents; Tottenham generally permissive.
Article 4: Borough-wide Article 4 for HMO conversions.
Steel beam and padstone design for the wall you want gone — a kitchen opened into the dining room, or two receptions knocked into one. On the terraced stock here that wall is usually carrying the floor above it.
Ridge beams, purlin supports, dormer framing, and the joist upgrade any loft has to have before it can be lived in, because the existing ceiling joists were never sized for anyone to walk on them.
Pad, strip or trench-fill foundation design, sized against the ground under the plot, whatever trees stand nearby, and wherever the drains happen to run — three things that set the depth far more often than the load above does.
New window and door openings: lintel specification in steel, concrete or timber, together with the bearing calculation that proves the load path either side of the new hole in the wall.
Sequential underpinning, reinforced slabs and retaining walls designed for lower-ground work, where the calculation has to cover the temporary condition during the dig as much as the finished structure.
A chartered structural engineer signs off every set we issue, CEng MIStructE or MICE, and that signature is what an approved inspector, or the council's own Building Control team, looks for before accepting a design at all.
Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Move the controls for an indicative figure. It anchors your budget — it is not a quote. Every project is priced after a free survey.
Build costs are separate and quoted by your contractor. See our published fees.
Postcode by postcode: where we work across this borough, what dominates each district structurally, and which authority validates a calculation package there. Fees quoted below are set by statute across England for 2026 and are payable to the council.
| Postcode | Area | Dominant stock | What it means for a structural calculation package |
|---|---|---|---|
| N4 | Finsbury Park / Stroud Green | Victorian terraces, post-war estates | N4 splits three ways. A Finsbury Park or Stroud Green address may answer to Haringey, to Islington or to Hackney, so settle the authority before anything is lodged. |
| N8 | Crouch End / Hornsey | Edwardian terraces, Victorian villas | N8 is wholly Haringey ground: Crouch End and Hornsey submissions go to Haringey Council, whose officers apply the N8 designation boundaries street by street. |
| N10 | Muswell Hill | Edwardian villas, 1930s semi-detached | Muswell Hill in N10 crosses the Haringey and Barnet boundary, and which council validates a package there is decided address by address off the policies map. |
| N15 | Seven Sisters / South Tottenham | Victorian terraces, post-war estates | Seven Sisters and South Tottenham lie completely inside N15, which makes Haringey Council the validating authority for anything submitted from that district. |
| N17 | Tottenham | Victorian terraces, post-war estates | Tottenham lies wholly inside N17, so every calculation package sent from an N17 address is validated by Haringey Council under its own local plan. |
| N22 | Wood Green / Alexandra Palace | Edwardian terraces, post-war flats | N22 sits entirely within the borough, so Wood Green and Alexandra Palace packages are validated by Haringey Council and read against the N22 conservation-area map. |
| N6 | Highgate | Georgian villas, Victorian and Edwardian semis | N6 covers Highgate across two boroughs: an address there may be determined by Camden or by Haringey, so establish which one before the drawings go in. |
Street to street around here the pitch is different, so is the wall build-up, so is the plot depth, and every one of those alters what a calculation package must account for at that particular address.
Haringey conservation designations: 29 of them, Tottenham Green, Bruce Castle and Highgate Village among them. Designation is what removes the permitted development route: inside a boundary the work needs a £548 householder application determined over 8 weeks, rather than a prior approval at £249, decided inside 6. Of the 29, Highgate Village is the one that most often sends a structural scheme back for redesign instead of mere resubmission.
Haringey and Article 4: Borough-wide Article 4 for HMO conversions. A structural calculation package planned at a N4 address is checked against that direction first; Haringey Council publishes the Haringey extent, and the N4 line rarely follows the Haringey boundary you would expect.
Haringey housing stock: Edwardian terraces in Crouch End, Muswell Hill; Victorian two-up-two-downs in Harringay Ladder; 1930s semi-detached in Muswell Hill; post-war in Tottenham. Muswell Hill and Crouch End have strong conservation coverage with clear loft/mansard precedents; Tottenham generally permissive. Read that before choosing a structural calculation package route in Haringey — construction, not postcode, sets what is achievable. Haringey Council charges £548 for a householder application and has 8 weeks to determine it.
Sources for this Haringey structural calculation package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
Straight answers to the structural-calculation questions put to us here most often, roughly in the order they arrive.
Start a free quote →The cost scales with how much of the building changes. One beam for one wall is the smallest job of all. A whole loft or extension set, covering ridge beam, purlins, lintels and foundations, is a good deal bigger. Basements and multi-storey interventions are quoted case by case. Chartered sign-off is inside the price whichever of those you need. See our fees.
Yes. Take out or alter anything load-bearing and calculations must prove that the replacement beam, plus whatever supports it, carries the load the old wall carried. No Building Control body signs it off without an engineer's name against the calculation. Have the partitions checked too: in converted terraces around this borough, walls that look non-structural regularly turn out not to be.
Reckon on 1 to 2 weeks from the moment we hold both the drawings and the measured dimensions. Where a start date is already fixed, a fast-track turnaround of 3 to 5 working days is available for a modest premium.
The two answer entirely different questions. What a structural survey does is inspect the existing building and report defects, movement or subsidence. Structural calculations design what is new — the beam, the foundation, the loft floor — and demonstrate that it works. Almost every extension or loft here needs the second, not the first. We produce calculations, and can point you at a surveyor should a condition report be the thing you actually needed.
Yes. Where another practice has already drawn the scheme, calculations can be commissioned entirely on their own. Want both halves? The Complete package bundles drawing work and structural work for less than the two bought separately.
If your property sits on a boundary, here are the neighbouring options.
One chartered team covers the whole span of architectural technology work in this borough, so nobody has to arrange a survey with one firm, calculations with a second and the Building Control submission with a third.
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