A construction-ready set drawn against every Approved Document that applies — A for structure, B for fire, L for energy, M for access — with the structural calculations coordinated into the drawings rather than bolted on afterwards, then submitted to LABC or to whichever approved inspector you appoint.
Usually a flat, and that changes the regulations that bite. Islington’s Datahub set records 10,989 basement applications and 3,192 mansards, and where work creates or alters a flat, Part B fire separation and the Fire Safety Order rule out the building notice route entirely.
| Requirement | Standard or period | Source |
|---|---|---|
| External wall, new thermal element | 0.18 W/m²K | Approved Document L, Volume 1 |
| Roof, new thermal element | 0.15 W/m²K | Approved Document L, Volume 1 |
| Windows and doors | 1.4 W/m²K | Approved Document L, Volume 1 |
| Full plans decision | 5 weeks, or 2 months by agreement | Building Regulations 2010, reg 14 |
| Building notice where the Fire Safety Order applies | not available | Building Regulations 2010, reg 12 |
| Building regulations package | from £840 | our fixed fee |
Sources: Approved Document L, Volume 1 (2021 edition, incorporating the 2023 amendments); the Building Regulations 2010 (as amended), regulations 12 and 14; the Regulatory Reform (Fire Safety) Order 2005; Datahub counts from the Planning London Datahub, retrieved 15 August 2026, phrase-matched and comparable within Islington only. Read at 1 September 2026.
In Islington — Georgian and early Victorian terraces for the most part — a building regulations drawings package is the full measured-survey-to-submission drawing set London Borough of Islington needs in order to determine an application: existing and proposed plans, elevations and sections at 1:100 and 1:50, a location and site plan, and the supporting statements the case officer asks for.
Prepared and reviewed by the chartered technologist team at Architectural Drawings London — MCIAT chartered, £2m PI insured.Last reviewed 2026-08-03.


A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessibility — submitted to LABC or your approved inspector with structural calculations coordinated.
Housing stock in Islington: Georgian and early Victorian terraces, Victorian bye-law housing, 1930s mansion blocks, converted industrial buildings in Clerkenwell and Farringdon.
Character: Densely terraced, gentrified; strong conservation area coverage; active planning department.
Article 4: Article 4 Direction covering the whole borough removes permitted development rights for HMO conversions (C3 to C4). Separate Article 4 for office-to-residential in key areas.
Plans, sections and elevations at 1:50, annotated throughout, every material and build-up specified so nobody on site is guessing.
Calculated U-values element by element — wall, roof, floor, glazing — with SAP or SBEM modelling where the work triggers it, and a compliance statement issued with the set.
Chartered engineer sign-off on beams, pad foundations, lintels, roof structure.
Escape routes, compartmentation, smoke alarms, fire-rated construction detail.
Soil and vent pipe routes, MVHR coordination, EV charging (Part S).
A Full Plans submission, lodged either with Islington Council Building Control or with an approved inspector, and the inspection sequence run for you from the first visit through to the completion certificate.

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.
Islington district by district: what we draw there, the housing type that predominates, and which authority validates a building regulations package at that address. Any fee shown is a national statutory rate for 2026 and not a price for the drawing work.
| Postcode | Area | Dominant stock | What it means for a building regulations package |
|---|---|---|---|
| EC1M | Clerkenwell | Georgian and early Victorian terraces | A building regulations package at an EC1M address in Clerkenwell is determined by Islington Council under its own Local Plan policies for Clerkenwell. |
| EC1R | Clerkenwell / Exmouth Market | Georgian and early Victorian terraces | A building regulations package at an EC1R address in Clerkenwell / Exmouth Market is determined by Islington Council under its own Local Plan policies for Clerkenwell / Exmouth Market. |
| EC1V | City Road / Old Street | Georgian and early Victorian terraces | A building regulations package at an EC1V address in City Road / Old Street is determined by Islington Council under its own Local Plan policies for City Road / Old Street. |
| EC1Y | Bunhill / Whitecross | Georgian and early Victorian terraces | EC1Y covers Bunhill / Whitecross only; Islington Council handles the building regulations package, and Bunhill / Whitecross case officers apply the EC1Y conservation-area map. |
| N4 | Finsbury Park / Stroud Green | Victorian terraces, post-war estates | N4 answers to three authorities. A Finsbury Park or Stroud Green address falls to Islington, Haringey or Hackney depending on the street. Building control is a separate choice again, and an approved inspector will take the work wherever the boundary lands — which is a fair argument for using one in N4. |
| N16 | Stoke Newington / Stamford Hill | Georgian and Victorian terraces | N16 covers Stoke Newington and Stamford Hill, split between Hackney and Islington. The line follows streets rather than neighbourhoods, so read the address off the policies map before anything is lodged. A submission to the wrong authority costs weeks rather than money. |
| WC1X | Bloomsbury / Mount Pleasant | Georgian and early Victorian terraces | WC1X straddles a boundary: Bloomsbury / Mount Pleasant addresses fall to Camden Council or Islington Council, so confirm which authority validates the building regulations package before submitting WC1X drawings. |
| N1 | Islington / Hoxton | Georgian and early Victorian terraces | N1 runs across Islington proper and Hoxton, which puts part of it in Hackney. On the Islington side homes changed hands at a £650,000 median through 2025 across 1,980 sales, 6.5% down on the year before (HM Land Registry Price Paid) — worth weighing when you decide how far to take the specification. |
Two houses on one Islington street can need different details. The pitch differs, the wall build-up differs, and the depth of the plot decides what the package can achieve at all.
Islington conservation designations: forty of them, Barnsbury, Canonbury and Highbury among the best known. Designation removes the permitted-development shortcut, and the scale of that removal shows in the returns. Over three years the council determined just 13 larger-householder prior approval applications, against 14,643 across London (MHCLG PS1, retrieved 3 September 2026). Thirteen cases is far too small a base to compute a refusal rate from, and the reason the base is that small is the borough itself: flats and designated terraces, where the right mostly does not exist to be used. The realistic route is a £548 householder application on the 8-week period rather than the £249 prior approval at 6 weeks. Barnsbury is the designation that reshapes the most schemes before they are drawn.
Islington and Article 4: Article 4 Direction covering the whole borough removes permitted development rights for HMO conversions (C3 to C4). Separate Article 4 for office-to-residential in key areas. A building regulations package planned at a N1 address is checked against that direction first; Islington Council publishes the Islington extent, and the N1 line rarely follows the Islington boundary you would expect.
The building fabric around Islington: Georgian and early Victorian terraces, Victorian bye-law housing, 1930s mansion blocks, converted industrial buildings in Clerkenwell and Farringdon. Densely terraced, gentrified; strong conservation area coverage; active planning department. A building regulations package in Islington is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Islington Council.
Sources for this Islington building regulations 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.
The questions Islington owners actually put to us about building control, answered without hedging.
Start a free quote →Two routes exist and both finish with the same legally valid certificate: the council's in-house Building Control on the LABC route, or a private approved inspector. The choice is practical rather than regulatory — availability, the builder's preference, how site visits fit your programme. We submit to whichever suits the job.
What a building regulations package costs in Islington follows the scope rather than the postcode. A rear extension or a straightforward loft sits at the baseline; HMOs, flat splits and basement conversions take more detailing and more coordination. Basements come up here more than in most boroughs for an obvious reason: 93.4% of Islington's land is already built up (Ordnance Survey built-up areas, retrieved 3 September 2026), and when a plot has no width left, the remaining direction is down. Structural calculations price by intervention — one beam is a fraction of a full underpinning package. Full fees are set out below.
Yes. Every habitable loft conversion needs Building Regulations approval — fire escape, floor structure, insulation, staircase geometry — in Islington as anywhere in England. The requirement stands whether or not you also need planning permission: the two consents run on separate tracks, and neither one substitutes for the other.
Part L fixes the minimum energy performance of the work itself: insulation, glazing U-values, air permeability, and the efficiency of whatever heats the new space. An Islington extension has to meet the 2025 uplift, the transitional step towards the Future Homes Standard. That bites harder here than in an average borough, because 35.9% of the 112,160 dwellings predate 1900 (VOA CTSOP4.1, 31 March 2025) and solid-wall construction has to be insulated without trapping moisture in fabric that was designed to breathe. Every Complete package carries the calculations and the compliance statement.
Islington Council Building Control reviews a Full Plans submission in roughly 5 to 8 weeks; an approved inspector usually turns one round in 2 to 4. Inspections then run across the build, commonly 6 to 10 visits depending on scope. Keep the two consents apart in your programme: on the planning side the same council issued 580 householder decisions inside 8 weeks (MHCLG PS2, retrieved 3 September 2026), and that statutory clock has no equivalent in building control.
Approval is needed for loft conversions, extensions, structural alterations, recovering a roof, forming a new opening in a wall, and for very nearly any work carried out inside a flat. A like-for-like replacement or a modest porch can sit outside the requirement. Which side of the line your job sits on is settled at the free site visit, before anyone commits to a route.
The completion certificate is the document that says the work complies, issued either by Islington Council Building Control or by the approved inspector who took the job. Without it a sale stalls. Conveyancers ask for it, and lenders will not release on a re-mortgage until they see it. Booking the inspections in the right order, and chasing the sign-off at the end, is part of every Complete package.
If an extension or loft conversion changes how the building performs thermally, the EPC needs updating, and the SAP or SBEM calculation prepared for Part L compliance is what produces it. Those calculations are included in the Complete and Bespoke packages.

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