House Extensions · N7 Holloway
Fixed-fee house extension drawings for Holloway, Tufnell Park, Lower Holloway, Hillmarton in the N7 postcode, drawn by an MCIAT-chartered architectural technologist and submitted to Islington Council. Islington controls the Hillmarton and Tufnell Park conservation areas; the former prison site is a major regeneration close to the residential streets.
MCIAT chartered drawings for planning, building regs, lofts and extensions — fixed fees 30% below typical London architects. Tell us what you need and we’ll reply the same working day.
House extensions in Holloway are dominated by single-storey rear and side-return additions on N7's victorian terraces, many converted to flats, with, with double-storey and wrap-around schemes where the plot allows. Islington Council weighs depth, height and neighbour daylight; many extensions across Holloway, Tufnell Park, Lower Holloway, Hillmarton are Permitted Development, which we confirm with a Lawful Development Certificate before you build.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for victorian terraces, many converted to flats, with typical of Holloway.
Across Holloway, Tufnell Park, Lower Holloway, Hillmarton in N7, the dominant property is victorian terraces, many converted to flats, with post-war estates and pockets of larger housing around holloway and tufnell park. That stock shapes what house extension drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Islington Council judges each on design quality and neighbour impact. We survey the specific Holloway property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the N7 streetscape.
Housing stock in N7: Victorian terraces, many converted to flats, with post-war estates and pockets of larger housing around Holloway and Tufnell Park.
Within the district: Holloway, Tufnell Park, Lower Holloway, Hillmarton.
Streets we know in N7: the Hillmarton roads, Mackenzie Road, Camden Road terraces and the Tufnell Park streets. Each road has its own building line, boundary treatment and precedent that Islington Council weighs when assessing a house extension drawings scheme.
Conservation areas: Hillmarton, Tufnell Park, Camden Road. Inside these, most external work needs full planning and a Heritage Statement.
Getting around N7: Holloway Road and Caledonian Road on the Piccadilly line, plus Tufnell Park and Caledonian Road & Barnsbury.
Regeneration: Holloway falls within or beside the Nag's Head / Holloway town centre and the former Holloway Prison site, which shapes local planning policy and design expectations.
Property values: around £500,000 for a flat and £1m-£1.4m for a house — a useful gauge of the build value an extension or loft adds in N7.
Borough character: Densely terraced, gentrified; strong conservation area coverage; active planning department.
Measured existing survey, photographic record, Article 4 and conservation check specific to Holloway before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Victorian terraces around Hillmarton and Mackenzie Road suit side-return and rear extensions and loft conversions, much of it within Permitted Development outside the conservation areas, confirmed with a Lawful Development Certificate. Inside Hillmarton or Tufnell Park, full planning applies. We confirm and draw to Islington's checklist.
The former Holloway Prison site is being redeveloped into new homes and public space, improving the area around Parkhurst Road and supporting values. For a house project the binding controls remain Permitted Development limits and the local conservation area, which we check for your address.
Yes. Much of Holloway is converted flats in Victorian terraces, where alterations touch shared structure and party walls, so we produce drawings that satisfy the freeholder and Islington Building Control, and serve Party Wall notices where works affect neighbours.
Usually yes outside the conservation areas — an L-shaped rear dormer within the volume allowance, confirmed by a Lawful Development Certificate. Inside Hillmarton, Tufnell Park or Camden Road, roof changes need full planning. We confirm which applies to your road.
Our fixed fee for house extension drawings in Holloway starts at £1,225 — no hourly billing. With Holloway property at around £500,000 for a flat and £1m-£1.4m for a house, the professional drawing fee is a small fraction of the value the work adds to N7's victorian terraces, many converted to flats, with. Islington Council charges its own statutory application fee on top (currently £258 for a householder planning application, £578 for a full application). We quote the drawings as one fixed price and the free site survey covers every N7 address.
For a N7 project across Holloway, Tufnell Park, Lower Holloway, Hillmarton, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Islington Council (8 weeks for a householder application). We carry the Holloway application through every officer query to the decision.
Holloway (N7) sits primarily in Islington, so applications are decided by Islington Council. Article 4 in force in the borough: Yes. Conservation areas within N7 include Hillmarton, Tufnell Park, Camden Road, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind house extension drawings in Holloway — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Islington Council Building Control or an approved inspector. On N7's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. With Holloway (N7) property at around £500,000 for a flat and £1m-£1.4m for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value, while our fixed drawing fee from £1,225 keeps the professional cost predictable. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on N7 homes.
From £840.
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From £1,225.
From £1,575.
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From £1,225.
Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.
Every N7 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. N7 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| N7 | Holloway / Tufnell Park | Victorian villas and terraces | N7 covers Holloway / Tufnell Park only; Islington Council handles the house extension, and Holloway / Tufnell Park case officers apply the N7 conservation-area map. |
| N7 | Tufnell Park | Victorian villas and terraces | Tufnell Park sits inside N7; house extension proposals here are determined by Islington Council. |
| N7 | Holloway | Victorian terraces, post-war estates | Holloway sits inside N7; house extension proposals here are determined by Islington Council. |
| N1 | Islington / Hoxton | Georgian and early Victorian terraces | Adjoining district to N7, also inside Islington for house extension purposes. |
| N5 | Highbury | Victorian terraces, mansion blocks | Adjoining district to N7, also inside Islington for house extension purposes. |
| N19 | Archway / Tufnell Park | Victorian terraces, post-war flats | Adjoining district to N7, also inside Islington for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few N7 streets, and each one changes what a house extension can achieve at that address.
How designation changes a N7 (Holloway / Tufnell Park) house extension: Islington Council maintains 40 conservation areas, including Barnsbury, Canonbury, Highbury. Inside any of them a N7 (Holloway / Tufnell Park) house extension cannot rely on permitted development, and the route becomes a £258 householder application determined in 8 weeks rather than a £120 prior approval in 6 weeks. Canonbury sets the tone for N7 (Holloway / Tufnell Park) casework.
Article 4 and your N7 (Holloway / Tufnell Park) house extension: 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. At a N7 address that matters twice over, because Islington Council applies the direction unevenly across N7 (Holloway / Tufnell Park) — we read the N7 (Holloway / Tufnell Park) policies map for the exact N7 address before quoting house extensions.
What N7 (Holloway / Tufnell Park) is built from: 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. That mix decides the house extension route in N7 (Holloway / Tufnell Park) more than the postcode does. Our fixed fee for house extensions in N7 (Holloway / Tufnell Park) starts at £1,225, against £1,750 for the Complete package that carries a N7 (Holloway / Tufnell Park) scheme through Islington Council planning and building regulations together.
Sources for this N7 house extension 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.
Free fixed quote in 60 seconds. From £1,225. MCIAT chartered.
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