Architects for Extensions & Planning Applications  in Haringey

Planning permission, architectural design and project management  delivered end-to-end by a multi-award-winning local team.

All In One Architectural Solution In Haringey

Planning applications handled for Haringey — council decisions arrive in 8 weeks standard.
Article 4 Directions affect many N4 streets — we check PD rights first.
Full design, planning, and building regulations delivered together under one fixed fee.
Loft conversions available — Velux, dormer, and hip-to-gable options all designed in-house.
In-house structural engineer included — no separate specialist needed for your calculations.
A 98% planning approval rate achieved across 38+ completed Haringey projects locally.

Extension Architecture handles planning applications, house extensions, and loft conversions across Haringey and the wider Haringey area, including N4, N8, N15. Some streets keep Permitted Development rights, but Article 4 applies in many areas. Our in-house structural engineer and RIBA-chartered team manage every stage, from survey to completion. Council decisions take 8 weeks. Get your free quote today.

We only deliver excellence

42⁺

Projects completed in Haringey

2220 ⁺

Our total projects completed in London & Surrey

Locations in Haringey

Haringey • Tottenham • Wood Green • Hornsey • Crouch End • Muswell Hill • Highgate (part) • Harringay • Seven Sisters • Finsbury Park (part) • Bounds Green • Alexandra Palace • Noel Park • Bruce Grove • White Hart Lane • Stroud Green (part)

Postcodes Served

N4, N8, N15

Our Expertise

Planning Application Drawings
Council-ready drawings, fast

3D Visualisations
See it before building

Retrospective Planning
Fix unpermitted works

Building Regulation Drawings
Safe, compliant drawings

Commercial Development Consultancy
Change of use experts

Interior Design
Finishes inside out

Spatial Planning & Layout
Smarter room layouts

Feasibility Consultancy
Know what’s possible

Recent Haringey Architects Extension & Loft Conversion Projects

What Makes Haringey Special?

Haringey is a diverse and vibrant borough with a mix of heritage sites, conservation areas, and contemporary developments. Navigating the planning permission process here requires both local knowledge and expertise in the planning laws, and that’s where we come in. Our team of Haringey planning consultants architects, and project managers work closely with clients to ensure that all developments comply with local authority guidelines while meeting your specific needs. We specialize in the Haringey area, meaning we understand the specific challenges and opportunities that come with planning permissions in this part of London. Whether you are looking to develop in conservation areas like Highgate or modernizing properties in Wood Green, we know how to approach Haringey Council and secure the necessary permissions.

In order to fully explore the potential of the property, Extension Architecture will collaborate with you to develop a concept design and sketch various layout options. To ensure the accuracy of the drawings we produce, we will also conduct a comprehensive measured survey of the Haringey property and its surroundings. We’ll prepare a set of scale drawings that represent the variety of ideas discussed in the briefing that followed. As necessary, we will communicate with London Borough of Haringey, the local planning authority for Haringey, while we draft and submit the planning application.

Victorian and Edwardian terraces dominate N4 — ideal for rear and loft projects.
Article 4 Directions cover many streets — early planning advice is recommended.
Strong local demand means well-designed extensions consistently add lasting property value.
Haringey Council works to a clear 8-week householder planning decision timeline.

Interior fit-out, Haringey

What Our Clients Say About
Extension Architecture

Interior fit-out, Haringey

Haringey Planning Applications And Architectural Services

Our project “104 Woodfield Way” features the design of a contemporary kitchen and utility room, offering both style and functionality. The kitchen is designed with a sleek, modern aesthetic, incorporating stone-effect floor tiles that add texture and durability to the space. These tiles complement the white worktop, which provides a clean, bright contrast and maximizes the sense of space

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Explore before & after visuals of our extension builder projects

See Portfolio

Before

After

Why Choose Extension Architecture?

Our experienced team of Haringey architects will take the lead and create a thoughtful design that maximizes the available space and is tailored to your tastes. We will guide you through the intricacies of the planning process and discuss every aspect of the project in detail. Our architects will carefully survey your property to ensure no detail is overlooked. We will be with you throughout the process, providing clearand comprehensive instructions while walking you through the planning, application and construction process.

One-Stop Solution

Our firm provides a comprehensive range of services under one roof, from planning and architectural design to intricate interior and immersive design, and expertly manages the complexities of the construction process. We have delivered projects of various scales and budgets, from small home extensions to large new builds, for a diverse clientele.

In-house Structural Engineer

Our in-house structural engineer—an advantage that only 1 in 20 firms can offer. This is crucial, as significant time is often lost consulting multiple specialists, which can lead to additional costs. With a structural engineer on our team, we ensure a fully collaborative and seamless design-build process, minimizing contingencies and preventing design inaccuracies.

Interior Design + Architecture

Our team includes interior designers who work closely with the clients, especially the ‘ladies’ of the house to curate the dream spaces tailored to their requirements. These processes include fun yet crucial processes like selecting wall finishes, color schemes, soft furnishings, flooring. Having architects and interior designers under one roof allows for less contingencies.

Turn-Key Approach

We provide support throughout the entire building process, embracing a ‘turnkey approach’ to ensure a smooth and efficient project from start to finish. Additionally, we assist in reducing build costs by aiding in the procurement of all internal fit-outs, including sanitaryware, kitchens, and more. It’s a zero hassle solution for clients.

Start Planning an Extension Home Today

If you are planning a house extension in London, our architects can guide you through the entire process from concept design to construction.

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Years of Experience

17

Any Questions?

Didn’t find your answer? Feel free to reach out

If you’re building a fairly standard single-storey rear extension and you stay within the normal size limits, you can often go ahead under Permitted Development without applying for planning permission. The catch is that a lot of streets across N4, N8 and N15 sit under an Article 4 Direction, which strips away those rights — so even a modest extension needs a full application to Haringey Council. Because it really does come down to your specific street, we check this for you before any design work starts, at no cost.

It varies street by street, not borough-wide, so there’s no single answer that applies to everyone. Coverage is concentrated in parts of N4, N8 and N15, with a fair amount overlapping conservation areas around Crouch End, Muswell Hill and Highgate. If you’re not sure where your road falls, that’s genuinely the first thing worth checking before you plan anything — we run that check against Haringey Council’s records for free.

Haringey Council usually takes around 8 weeks to decide a standard householder application once it’s been validated. If you’re in a conservation area or your project is more involved, that can stretch closer to 13 weeks. Once you get permission, it’s valid for 3 years, so there’s no rush to start building immediately. We keep an eye on every application through the council portal and jump on any queries straight away so nothing sits waiting.

Under Permitted Development, most detached houses can extend up to 4 metres from the rear wall, while semi-detached and terraced houses are usually limited to 3 metres — assuming you’re not in an Article 4 area. There are height and boundary rules layered on top of that too, and it’s easy to get wrong on paper. We work out the exact allowance for your actual property before you commit to a design, so you’re not designing something you can’t build.

It’s not the end of the road. You can appeal to the Planning Inspectorate, or — more commonly — resubmit a revised application that directly addresses whatever the council flagged, usually without paying the application fee again if it’s within 12 months. We go through the refusal reasons with you and redesign around them rather than just resubmitting the same thing and hoping. It’s part of why our approval rate across Haringey projects sits at 98%.

We’ve been doing this for 17 years and have completed 38+ projects across N4, N8, N15 and the wider Haringey area, with a 98% planning approval rate. The team is RIBA-chartered and ARB-registered, and we’ve got a structural engineer in-house — something only around 1 in 20 firms actually offer — so calculations happen alongside the design instead of causing delays later. Before any fee is agreed, we’ll walk you through a free feasibility check covering what’s realistic for your property and roughly how long it’ll take.

Architects for Extensions & Planning Applications  in Haringey