Party Wall Surveyor Belgravia

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Post a Party Wall job for a Belgravia property. The administrator reviews the complete request manually and could invite participating surveyors whose stated coverage and profile fit the brief when the comparison service is available. Submission does not guarantee an invitation, quote or introduction.

Post your Belgravia Party Wall job

Establish the planning authority from the address

Belgravia is a familiar place name, but it is not proof of the local planning authority. The adopted Westminster Belgravia Neighbourhood Plan applies only inside its designated Westminster neighbourhood area. At the western edge, Royal Borough of Kensington and Chelsea designations meet the city boundary: RBKC’s adopted Sloane Square Conservation Area Appraisal records Westminster’s Belgravia Conservation Area immediately to its east.

That seam matters because the two councils apply different local plans, basement policies, Article 4 directions and heritage documents. A postcode, estate description or agent’s use of “Belgravia” should not substitute for an address-level authority and conservation-area check.

For an address in Westminster, use the Westminster Party Wall guide. For an address inside RBKC, use the Kensington and Chelsea Party Wall guide. The authority question changes the planning material to examine; it does not change the tests in the Party Wall etc. Act 1996.

Adopted neighbourhood plan, draft conservation audit

Westminster’s current planning-policy page records that the Belgravia Neighbourhood Plan was adopted on 7 March 2024. In its Westminster area, those policies form part of the development plan alongside the City Plan and London Plan.

The similarly named full conservation audit has a different status. Westminster’s current conservation-document index still labels it Draft Belgravia conservation area audit. The adopted neighbourhood plan explains that the audit was prepared in 2013 and consulted on in 2014 but was not formally adopted. The plan may refer to and endorse that work, but that does not convert the audit itself into an adopted supplementary planning document.

This distinction is publishable and practical: identify whether a quoted proposition comes from the adopted neighbourhood plan, the current City Plan, an adopted document or the draft audit. Westminster also warns that even adopted older conservation audits can refer to policies predating the present framework and should be read with current adopted policy.

Basement controls differ across the boundary

Westminster’s current City Plan was adopted on 21 January 2026. Policy 50 normally restricts a basement to one storey and limits the portion of garden beneath which it may extend. Paragraph 50.2 says a basement application should include a structural methodology statement and appropriate self-certification from a suitably qualified engineer.

Where a Westminster vault extends under the adjacent highway, Policy 50 adds two exact controls: no more than 1.8 metres of encroachment under the highway and at least 900 millimetres of vertical cover between the highway surface and vault structure. These are planning controls. They are not the three- or six-metre excavation tests in the Party Wall Act.

Westminster’s city-wide basement Article 4 direction came into force on 31 July 2016. It removes the specified householder permitted-development right for basement development, lightwells and development below a dwellinghouse or its curtilage. It makes planning permission necessary for that development; it does not prohibit every basement.

On the RBKC side, the Local Plan 2024 was adopted on 24 July 2024. Policy CD11 normally limits a basement to one storey and no more than 50 per cent of each garden or open part of the site, requires at least one metre of soil above a garden basement and does not permit excavation underneath a listed building, including vaults. The one-storey and garden criteria contain stated exceptions for large sites and should not be presented as absolute in every case.

RBKC’s separate borough-wide basement Article 4 direction came into force on 28 April 2016. Its schedule and dates are different from Westminster’s direction. The council recommends checking Article 4 information with it directly, so an address should be tested against the direction and current map rather than inferred from the district name.

Apply sections 1 to 3 and 6 precisely

The statutory route depends on the proposed operation, not on whether the property is a terrace or in a conservation area.

Section 1 applies where differently owned adjoining lands meet and the line is unbuilt or occupied only by a boundary wall that is neither a party fence wall nor an external building wall. Where an owner is about to build on that line, notice must be served at least one month before the work. Without consent to build astride it, the statutory alternative is a wall wholly on the building owner’s land and at that owner’s expense.
Section 2 gives specified rights in relation to party structures. Where section 3 requires notice of that work, the normal lead time is two months.
Section 6 concerns specified excavation and has a normal one-month notice period.

The section 6(1) shorthand “within three metres” is incomplete. Both statutory conditions must be met: the work is within three metres horizontally of a building or structure on the adjoining owner’s land and some part of the proposed excavation, building or structure within those three metres will extend below the bottom of the adjoining foundations.

Section 6(2) is separate. It applies within six metres where any part of the proposed excavation, building or structure would meet a plane drawn downwards, in the direction of the building owner’s excavation, building or structure, at forty-five degrees to the horizontal. It starts from the line where the horizontal plane at the bottom of the adjoining foundations intersects the plane of the external face of the adjoining external wall.

A section 6 notice must be accompanied by plans and sections showing the site and depth of the excavation and, where a building or structure is proposed, its site. Foundation depth should not be guessed from a property’s age or appearance.

For a section 3 party-structure notice, section 5 deems a dispute after fourteen days without written consent. Section 6(7) provides its own fourteen-day deemed-dispute route for an excavation notice. Section 1 has different response provisions, so “no reply in fourteen days always means dissent” is not a safe summary of every notice. The party wall notice guide keeps the notice categories separate.

If a dispute arises or is deemed to arise, section 10 allows the owners to concur in one agreed surveyor or each appoint a surveyor. A person who is party to the matter cannot act as the statutory surveyor. A schedule of condition is commonly useful evidence, but the Act does not make it a freestanding prerequisite for every job.

Define the Belgravia property and the proposed work

Provide enough address and design information for the statutory route and quote scope to be assessed:

the complete address and the confirmed local planning authority;
the named conservation area and any listed-building entry;
whether the property is a house, purpose-built flat, converted flat, mews building or mixed-use premises;
the freeholder and relevant leasehold interests;
the wall, floor, ceiling or other structure affected;
boundary information and the position of any proposed wall;
excavation plans and sections, with depths, distances and known adjoining-foundation information;
whether a basement, lightwell, rear extension, vault, chimney breast or structural beam is involved;
the notice served or received, its attachments and delivery date; and
intended works dates and known access constraints.

Planning permission, listed-building consent and Party Wall rights are separate. A planning approval does not dispense with a valid notice, and consent to a Party Wall notice does not grant planning or listed-building consent.

The Party Wall surveyor guide explains the appointment process. The Party Wall surveyor London guide gives the wider regional context.

FindTheSurveyor operates a neutral marketplace and does not carry out the surveying work. If a quote is presented, compare the proposed appointing owner, statutory scope, inspections and documents, exclusions, VAT treatment and the basis for any additional work. If the administrator makes a confirmed introduction, the professional appointment and payment terms are agreed directly with the selected surveyor.

Sources checked

The linked Westminster and RBKC planning material, the councils’ current policy and conservation indexes, and the Party Wall etc. Act 1996 were checked on 24 August 2026. Planning status, mapped boundaries and property designations can change, so verify the complete address against current official records.