End-to-end Party Wall Act 1996 service for Hillingdon — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordination. We handle the process so your Hillingdon build starts without neighbour disputes.
One month before building at the boundary or excavating within three metres of a neighbour’s foundations, two months before cutting into a shared wall. On the 6m prior approval route Hillingdon waves most schemes through, but the party wall clock runs separately.
| Section | Work it catches | Notice period |
|---|---|---|
| Section 1 | New wall at or astride the boundary | 1 month |
| Section 2 | Cutting into or raising a shared wall | 2 months |
| Section 6(1) | Excavating within 3m, deeper than their footings | 1 month |
| Section 6(2) | Excavating within 6m, inside a 45-degree line | 1 month |
| No reply within 14 days | deemed dissent, surveyors appointed | Section 10 |
| Hillingdon larger-extension notifications | 476 | 354 not required |
Sources: the Party Wall etc. Act 1996, sections 1, 2, 6 and 10, read at 1 September 2026; Hillingdon figures from MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026. A prior approval ruling of ‘not required’ means the extension may be built in planning terms; it says nothing at all about the party wall position.
In Hillingdon — 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow for the most part — a party wall services package is the full measured-survey-to-submission drawing set London Borough of Hillingdon 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.


End-to-end Party Wall Act 1996 service for Hillingdon — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordination. We handle the process so your Hillingdon build starts without neighbour disputes.
Housing stock in Hillingdon: 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow.
Character: Largest outer west London borough; significant Green Belt; Heathrow noise contours affect planning decisions in Harmondsworth and Sipson.
We review your Hillingdon project and confirm which Party Wall Act sections apply — Section 1 (new wall on boundary), Section 3 (adjacent excavation) or Section 6 (line of junction).
Legally-compliant notices prepared and served on all adjoining owners, with 14-day or 1-month response periods tracked.
Photographic and written record of neighbouring properties before work starts — protects you and your Hillingdon neighbours from disputes.
Technical drawings showing the proposed works in relation to the party wall, foundations and adjoining structures — required by the Act.
If neighbours dissent, we coordinate the appointment of agreed surveyors or independent surveyors to prepare the Party Wall Award.
Liaison through the award process — method statements, temporary works, access arrangements — until the award is agreed and you can start on site.

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.
Every Hillingdon postcode district we draw in, the stock that dominates it and the authority that validates a party wall package there. Hillingdon fees below are the statutory England rates for 2026, not party wall package estimates.
| Postcode | Area | Dominant stock | What it means for a party wall package |
|---|---|---|---|
| UB4 | Hayes / Yeading | 1930s semi-detached, post-war estates | UB4 covers Hayes / Yeading only; Hillingdon Council handles the party wall package, and Hayes / Yeading case officers apply the UB4 conservation-area map. |
| UB7 | West Drayton / Sipson / Harmondsworth | 1930s semi-detached, post-war | A party wall package at an UB7 address in West Drayton / Sipson / Harmondsworth is determined by Hillingdon Council under its own Local Plan policies for West Drayton / Sipson / Harmondsworth. |
| UB8 | Uxbridge / Cowley | Georgian fragments, 1930s semi-detached, post-war flats | Uxbridge / Cowley sits wholly inside UB8, so Hillingdon Council validates every party wall package submitted from an UB8 address. |
| UB9 | Denham / Harefield | Tudor and Georgian fragments, 1930s semi-detached | Denham / Harefield sits wholly inside UB9, so Hillingdon Council validates every party wall package submitted from an UB9 address. |
| UB10 | Hillingdon / Ickenham | 1930s semi-detached, Tudor fragments | Hillingdon / Ickenham sits wholly inside UB10, so Hillingdon Council validates every party wall package submitted from an UB10 address. |
| UB11 | Stockley Park | 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow | Stockley Park sits wholly inside UB11, so Hillingdon Council validates every party wall package submitted from an UB11 address. |
| HA4 | Ruislip | 1930s semi-detached, Tudor cottages | A party wall package at an HA4 address in Ruislip is determined by Hillingdon Council under its own Local Plan policies for Ruislip. |
| HA5 | Pinner / Eastcote | Tudor fragments, Edwardian villas, 1930s semi-detached | HA5 straddles a boundary: Pinner / Eastcote addresses fall to Hillingdon Council or Harrow Council, so confirm which authority validates the party wall package before submitting HA5 drawings. |
Roof pitch, wall build-up and plot depth change every few Hillingdon streets, and each one changes what a party wall package can achieve at that address.
Hillingdon conservation designations: there are 29 across Hillingdon Council, Northwood, Harefield, Ickenham among them. Designation costs a Hillingdon owner the permitted-development route: a party wall package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Northwood is the Hillingdon designation that most often changes a party wall package design.
No blanket Article 4 over Hillingdon: Hillingdon Council has not withdrawn permitted development across Hillingdon, so a party wall package outside a Hillingdon conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a HA4 owner wants on file.
Hillingdon housing stock: 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow. Largest outer west London borough; significant Green Belt; Heathrow noise contours affect planning decisions in Harmondsworth and Sipson. Read that before choosing a party wall package route in Hillingdon — construction, not postcode, sets what is achievable. Hillingdon Council charges £548 for a householder application and has 8 weeks to determine it.
Sources for this Hillingdon party wall 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.
Direct answers to the questions Hillingdon homeowners ask every week about party wall services.
Start a free quote →You need Party Wall Act notices if your Hillingdon project involves: building on or astride a boundary (Section 1), cutting into a party wall or party structure (Section 3), or excavating within 3m/6m of an adjoining property's foundations (Section 6). Most loft conversions, extensions and basement digs in Hillingdon trigger at least one section.
If your neighbour consents, that is the whole cost. If they dissent, surveyors must be appointed for the Award and their fees are additional, per neighbour. Notices are included in our Complete architectural packages at no extra charge. See our fees.
If all adjoining owners in Hillingdon consent: 14 days (Section 3/6 notice) or 1 month (Section 1 notice). If they dissent and surveyors must be appointed, allow 6–8 weeks for the Award. We serve notices as early as possible so the process runs in parallel with your planning application.
No — starting notifiable works in Hillingdon before serving valid notices or obtaining a Party Wall Award is a breach of the Party Wall Act 1996. It can result in injunctions, damages and loss of your statutory protections. We ensure notices are served at the right time so your build timeline is not delayed.
If an adjoining owner in Hillingdon does not respond within 14 days, the Act deems them to have dissented. This triggers the surveyor appointment process — you appoint a surveyor, they can appoint their own (at your cost) or you can agree on a single 'agreed surveyor'. We manage this process and keep it moving.

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