Party Wall Drawings Hounslow | W3, W4

Does a Hounslow extension need party wall notices?

On a terrace, two — one for each shared wall — with two months’ notice for cutting in and one for excavation within three metres. Hounslow refuses more applications than most, at a 69.9% approval rate, but the Act is enforced by neighbours rather than the council.

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
Hounslow householder approval rate	69.9%	83.0% across London

Sources: the Party Wall etc. Act 1996, sections 1, 2, 6 and 10, read at 1 September 2026; Hounslow decision figures from MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026. Planning permission and a party wall award are independent: holding one is no defence to proceeding without the other.

What is a party wall services package in Hounslow?

In Hounslow — Edwardian villas in Chiswick and Turnham Green; Georgian in Isleworth; 1930s semi-detached in Hounslow and Feltham; riverside new-build in Brentford for the most part — a party wall services package is the full measured-survey-to-submission drawing set London Borough of Hounslow 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.

Planning authority: London Borough of Hounslow
Postcode districts: W3, W4, TW3, TW4, TW5, TW7…
Article 4: No borough-wide Article 4 direction on householder permitted development
Typical housing stock: Edwardian villas in Chiswick and Turnham Green; Georgian in Isleworth; 1930s semi-detached in Hounslow and Feltham; riverside new-build in Brentford
Conservation areas: 30 in Hounslow
Timeline: 1–2 weeks for notices

Prepared and reviewed by the chartered technologist team at Architectural Drawings London — MCIAT chartered, £2m PI insured.Last reviewed 2026-08-03.

What's included

Fully end-to-end in Hounslow.

Party Wall assessment

Which sections of the Act your Hounslow project engages is the first thing we establish. A new wall raised on the line of junction, or right up against it, falls under Section 1. Sections 2 and 3 govern work to an existing party wall or party structure — cutting in, raising it, underpinning it. Section 6 governs excavation within 3 metres of an adjoining building, or within 6 metres where the dig goes deeper. Section 6 is the one that surprises people in this borough. Flood Zone 2 covers 12.73% of Hounslow and Zone 3 covers 9.74%, tracking the Thames frontage and the Crane, and difficult ground pushes the foundation solution deeper — which is precisely what drags the neighbour into a notice.

Notice drafting & service

Notices are drafted to the statute, served on each adjoining owner, and their dates tracked. The adjoining owner has 14 days in which to reply, and silence counts against them as dissent.

Schedule of condition survey

A schedule of condition: photographs plus a written record of the neighbouring property taken before anything starts. The protection runs both ways, since this is the only surviving evidence of what those cracks looked like before a spade went in.

Party wall drawings

Drawings that put the proposed work next to the shared wall, to what carries it, and to whatever stands on the other side. The Act requires them, and any surveyor appointed will ask for them first.

Surveyor appointment coordination

Where a neighbour dissents, we coordinate the appointment: either one agreed surveyor acting for both owners, or two surveyors, one apiece, settling the Party Wall Award between them.

Award support

Through the award process we stay involved: temporary works, access, the method statement, all of it, until the award is signed and the site can open.

Which postcode districts around Hounslow do we cover for party wall package work?

The Hounslow districts we serve notices in, what stands in each, and which authority validates the work there. The fee column carries 2026 England statutory rates, not our party wall charges.

Postcode	Area	Dominant stock	What it means for a party wall package
TW5	Heston / Cranford	Edwardian villas in Chiswick and Turnham Green; Georgian in Isleworth; 1930s semi-detached in Hounslow and Feltham; riverside new-build in Brentford	Heston and Cranford lie wholly inside TW5, so Hounslow Council validates every party wall package coming from a TW5 address.
TW7	Isleworth	Georgian and Victorian terraces	TW7 covers Isleworth, and a party wall package from that district is determined by Hounslow Council against the Isleworth policies in its Local Plan.
TW8	Brentford	Georgian fragments, Victorian terraces, new-build	Brentford sits wholly inside TW8, so Hounslow Council validates every party wall package submitted from a TW8 address.
TW13	Feltham	1930s semi-detached, post-war estates	TW13 is Feltham, wholly inside Hounslow. The council handles the party wall package, and Feltham case officers read the address against the TW13 conservation-area map.
TW14	Feltham / East Bedfont	Edwardian villas in Chiswick and Turnham Green; Georgian in Isleworth; 1930s semi-detached in Hounslow and Feltham; riverside new-build in Brentford	Feltham and East Bedfont in TW14 fall to Hounslow Council, which measures a party wall package there against the Local Plan policies covering that western edge of the borough.
W3	Acton	Victorian and Edwardian terraces	Acton is divided at W3. Ealing Council determines most of it and Hounslow Council the remainder, so a W3 address gets checked against both policies maps before a party wall package is lodged.
W4	Chiswick / Bedford Park	Arts & Crafts villas (listed)	Chiswick and Bedford Park sit in W4, which crosses the borough line, so a party wall package there may land with Hounslow Council or with Ealing Council; the W4 policies map decides it street by street.
TW3	Hounslow	1930s semi-detached, post-war flats	TW3 is Hounslow town itself, so a party wall package from that district is determined by Hounslow Council against its own Local Plan policies.

Which Hounslow neighbourhoods suit a party wall package best?

Foundation depth, wall construction and plot width change between one Hounslow street and the next, and all three bear on whether a neighbour has to be served at all.

Chiswick (W4) — party wall package work in Chiswick means edwardian villas, victorian terraces. Chiswick is Edwardian villas, conservation. Victorian terraces here almost guarantee a party wall notice — the party structure notice runs one month throughout W4. Hounslow Council decides the Chiswick application, and Chiswick House anchors the Chiswick location plan.
Brentford (TW8) — a party wall package in Brentford starts from georgian fragments, victorian terraces, new-build, and Brentford reads as Georgian fragments, riverside new-build. Georgian party walls here are shared brick in TW8. Hounslow Council assesses Brentford party wall services against its own Brentford character guidance, and the location plan we draw for Brentford references Kew Bridge.
Isleworth (TW7) — Georgian and Victorian terraces defines Isleworth, where georgian and victorian terraces set what a party wall package can do. Georgian party walls here are shared brick across TW7. Any Isleworth party wall package is validated by Hounslow Council, with Old Isleworth the usual Isleworth reference point on the site plan.
Hounslow (TW3) — 1930s semi-detached, post-war flats defines Hounslow, where 1930s semi-detached, post-war flats set what a party wall package can do. 1930s semis here trigger section 6 whenever foundations go within 3 m of the neighbour and deeper than theirs across TW3. Any Hounslow party wall package is validated by Hounslow Council, with Hounslow Central the usual Hounslow reference point on the site plan.
Feltham (TW13) — a party wall package in Feltham starts from 1930s semi-detached, post-war estates, and Feltham reads as 1930s semi-detached, post-war estates. 1930s semis here trigger section 6 whenever foundations go within 3 m of the neighbour and deeper than theirs in TW13. Hounslow Council assesses Feltham party wall services against its own Feltham character guidance, and the location plan we draw for Feltham references Feltham station.
Hanworth (TW13) — 1930s semi-detached defines Hanworth, where 1930s semi-detached set what a party wall package can do. 1930s semis here trigger section 6 whenever foundations go within 3 m of the neighbour and deeper than theirs across TW13. Any Hanworth party wall package is validated by Hounslow Council, with Hanworth Park the usual Hanworth reference point on the site plan.
Turnham Green (W4) — Edwardian villas, conservation defines Turnham Green, where edwardian villas set what a party wall package can do. Edwardian semis here trigger the Act on the attached side whenever a beam bears into the party wall across W4. Any Turnham Green party wall package is validated by Hounslow Council, with Turnham Green the usual Turnham Green reference point on the site plan.

What local planning policy applies to a party wall package in Hounslow?

Hounslow conservation designations: 30 across the borough, Brentford, Chiswick and Bedford Park among them. Designation costs an owner the permitted-development route, so the job turns into a £548 householder application decided over 8 weeks, where the prior approval alternative would have been £249 across 6. Bedford Park reshapes more schemes here than any other designation, and its Chiswick terraces stand close enough together that a Section 6 excavation notice is all but certain alongside the planning route.

Article 4 and your Hounslow party wall package: Hounslow Council has made no borough-wide direction, so permitted development for a party wall package in Hounslow generally survives outside Hounslow conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a W4 owner records that a party wall package was lawful.

The building fabric around Hounslow: Edwardian villas in Chiswick and Turnham Green; Georgian in Isleworth; 1930s semi-detached in Hounslow and Feltham; riverside new-build in Brentford. Chiswick is one of west London's most conservation-controlled areas; outer Hounslow is permissive suburban. A party wall package in Hounslow 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 Hounslow Council.

Which neighbouring authorities border Hounslow?

Hillingdon — adjoining Hounslow, with 29 conservation areas centred on HA4. A party wall package on the far side of the Hounslow line is determined by Hillingdon Council, so the Hounslow quote for party wall services is checked against Hillingdon guidance before it is issued.
Ealing — cross the Hounslow boundary and Ealing Council takes the party wall package instead, applying 30 conservation areas of its own around W3. We re-price party wall services at the Hounslow edge because Ealing policy and Hounslow policy rarely align on party wall package depth.
Hammersmith and Fulham — cross the Hounslow boundary and Hammersmith & Fulham Council takes the party wall package instead, applying 45 conservation areas of its own around W6. We re-price party wall services at the Hounslow edge because Hammersmith and Fulham policy and Hounslow policy rarely align on party wall package depth.
Richmond upon Thames — adjoining Hounslow, with 72 conservation areas centred on SW13. A party wall package on the far side of the Hounslow line is determined by Richmond Council, so the Hounslow quote for party wall services is checked against Richmond upon Thames guidance before it is issued.

Sources for this Hounslow 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.

Hounslow FAQs

Party Wall Services in Hounslow — your questions answered.

Direct answers to what Hounslow homeowners ask us about party wall notices, awards and surveyors.

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Do I need a party wall agreement in Hounslow?

Notices become necessary once the Hounslow work involves putting a structure on or across the boundary (Section 1), cutting into a shared wall or structure (Sections 2 and 3), or digging near what supports an adjoining property's foundations (Section 6). Most loft conversions, most rear extensions and every basement in the borough engage at least one of the three.

How much does a party wall notice cost in Hounslow?

Consent from the neighbour, and that is all it costs. Dissent, and surveyors must be appointed for the Award and their fees come on top, charged per adjoining owner. Notices are included in our Complete architectural packages at no extra charge. See our fees.

How long does the party wall process take in Hounslow?

Notice periods run ahead of the work rather than after it. A line of junction notice under Section 1 and an excavation notice under Section 6 each need one month; a party structure notice under Section 3 needs two. Fourteen days is what the adjoining owner gets in which to consent or to dissent. Where everyone consents, you begin once the notice period expires. Where anyone dissents and surveyors get appointed, six to eight weeks is a realistic allowance for drawing up and serving the Award. We serve at the front of the programme so this runs beside the planning application, not behind it.

Can I start building before the party wall award in Hounslow?

No. Begin notifiable work in Hounslow without valid notices served, or ahead of an Award, and the Party Wall etc. Act 1996 has been breached. It leaves you exposed to an injunction, to a claim in damages, and to forfeiting protections the statute would have handed you for free. We serve early enough that the party wall process is never the thing your build programme is waiting on.

What happens if my Hounslow neighbour ignores my party wall notice?

Silence is dissent. Where an adjoining owner in Hounslow lets fourteen days pass without replying, the Act treats that as dissent, and that triggers the appointment process: you appoint a surveyor, they may appoint their own at your expense, or the two sides agree on one surveyor between them. We keep that moving instead of letting it stall.

Party Wall Drawings & Notices in Hounslow

Does a Hounslow extension need party wall notices?

What is a party wall services package in Hounslow?

Quick facts · Party Wall Services in Hounslow

How does planning policy in Hounslow affect your party wall services?