Party Wall Surveyor Hammersmith
Current service: you can submit and verify a request for administrator review. Invitations, quote comparison and introductions are not currently available. A request does not guarantee a quote or local availability.
Post a Party Wall job for a Hammersmith property. The administrator reviews the complete request manually and could invite participating surveyors whose stated coverage and profile fit the described work when the comparison service is available. Submission does not guarantee an invitation, quote or introduction.
Post your Hammersmith Party Wall job
Use the adopted documents, not the replacement draft
The borough’s Local Plan adoption statement records adoption on 28 February 2018. That plan remains the adopted starting point for Hammersmith applications.
The council consulted on a Regulation 18 replacement draft from 29 October to 10 December 2025. The consultation page, updated 23 March 2026, says it is closed. A Regulation 18 draft is an emerging document; it has not displaced the 2018 plan. Any online extract should therefore be labelled by plan and status rather than presented as a current adopted rule merely because it is newer.
Hammersmith also has an adopted town-centre document. The Hammersmith Town Centre SPD adoption statement gives an adoption date of 6 August 2024. It guides regeneration within its mapped town-centre area and supplements Local Plan policy. It is not a site allocation, a borough-wide house-extension code or a substitute for the development plan.
The Hammersmith and Fulham Party Wall guide gives the wider borough position. The West London Party Wall guide places the instruction in its regional context.
Do not confuse two different 45-degree tests
The adopted Planning Guidance SPD took effect on 28 February 2018. Its Key Principle HS6 uses a 45-degree line to assess the scale and massing of development and its effect on neighbouring residential amenity:
- where the adjoining rear garden is under nine metres long, the line is measured from ground level at the adjoining rear boundary;
- where that garden or separation is over nine metres, it is measured from a point two metres above ground level at the adjoining boundary; and
- if part of a proposal crosses the relevant line, the guidance says on-site judgement will be a determining factor.
That is a planning assessment, not the section 6(2) excavation plane. It does not prove that Party Wall notice is required and it does not identify the adjoining foundation level. A drawing can cross the HS6 amenity line without meeting section 6, or meet section 6 without breaching HS6.
The local principle is especially relevant where a rear extension is being assessed among the narrow plots and back additions described by the SPD. The Party Wall analysis still starts with the actual wall, boundary, excavation and ownership arrangement rather than the council’s daylight or outlook conclusion.
Basement policy needs more than one percentage
Policy DC11 of the 2018 Local Plan applies two separate depth limits where a basement extends into or beneath a garden. The extension must not project more than 50 per cent of the host building’s depth, measured from its principal rear elevation, and must not project more than 50 per cent of the garden depth. Showing only one percentage is incomplete.
The policy also requires basement development outside the host building footprint to be set back from neighbouring property boundaries, ordinarily limits it to one storey and requires at least one metre of soil above any part beneath a garden. These are planning criteria. The setback does not create a statutory safe distance under the Party Wall Act.
Every basement planning application must include a Construction Method Statement prepared by a qualified structural or civil engineer. Paragraph 12.66 says the statement is to be made available at the same time to neighbouring owners. Availability gives the neighbour a useful planning-stage document, but it is not service of notice, written consent or a section 10 award.
Article 4 coverage is not one uniform Hammersmith label
The borough’s confirmed basement direction was made on 25 April 2017, confirmed on 16 April 2018 and came into force on 26 April 2018. It removes the specified householder permitted-development right for basement development, lightwells and development below a dwellinghouse or its curtilage across Hammersmith and Fulham except the Old Oak and Park Royal Development Corporation area. That exclusion is at the borough’s northern edge and belongs in any borough-wide statement; use the exact address rather than a district name if the site is near a development-corporation boundary.
There are also address-specific heritage controls. The council’s 5 November 2018 decision extended and renamed King Street East as Hammersmith Town Hall Conservation Area and adopted its character profile. Hammersmith Broadway, Hammersmith Odeon, The Mall, Hammersmith Grove and other designations cover different mapped areas; “central Hammersmith” is not a conservation-area name.
A separate Hammersmith Grove (No.1) Article 4 summary lists particular properties and controls specified front-elevation alterations, porches, boundary treatments, painting and demolition or alteration. It should be checked by house number. It is not evidence that every Hammersmith Grove address has identical restrictions.
The council’s urban design and conservation page records 44 conservation areas borough-wide and explains that Article 4 directions remove only specified permitted-development rights. A direction makes an application necessary for the work it covers; it does not prohibit all work and it does not itself engage the Party Wall Act.
Apply the statutory gateways to the proposed operation
Section 1 applies only where differently owned adjoining lands meet and the line of junction is unbuilt or occupied only by a boundary wall that is neither a party fence wall nor an external wall of a building. If an owner is about to build on any part of that line, the section requires at least one month’s notice. Without the adjoining owner’s consent to build astride the line, the statutory alternative is a wall wholly on the building owner’s land and at that owner’s expense.
Section 2 provides specified rights concerning party structures. Where section 3 requires notice of the proposed section 2 work, the normal lead time is at least two months. Section 3(3) does not prevent exercise of a section 2 right with the written consent of the adjoining owners and adjoining occupiers, and it does not require a party-structure notice before compliance with a statutory notice about a dangerous or neglected structure.
Section 6(1) contains two conditions joined by and. The building owner must propose to excavate, or excavate for and erect a building or structure, within three metres horizontally of any part of an adjoining owner’s building or structure and some part of the proposed excavation, building or structure within those three metres must extend lower than the bottom of the adjoining foundations. Distance alone is insufficient.
Section 6(2) is separate. Within six metres, it asks whether 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. The plane starts at the line formed by the intersection of the horizontal plane at the bottom of the adjoining foundations with the plane of the external face of the adjoining building’s external wall.
Where section 6 applies, the building owner must serve notice at least one month before beginning to excavate, or to excavate for and erect a building or structure. The notice must be accompanied by plans and sections showing the excavation’s site and depth and, where a building or structure is proposed, its site. The party wall notice guide keeps the statutory categories and response routes separate.
Build a Hammersmith brief that can be checked
Provide the complete address, the confirmed planning authority, named conservation area and any listed status. Add existing and proposed plans, a section through each excavation, dimensions from adjoining structures, known foundation information, boundary material, structural drawings and the current CMS revision. Identify the wall, floor, ceiling or other structure affected and the freehold and relevant leasehold interests.
Include notices, attachments, responses and delivery dates already available. Keep unknown foundation depth as an uncertainty instead of turning it into an automatic three-metre notice claim. The Party Wall surveyor cost guide explains why the number of owners, drawing quality, inspection scope, schedules, award work and later visits can alter the professional scope.
The Party Wall surveyor guide explains the statutory appointment process. FindTheSurveyor operates a neutral marketplace and does not carry out the surveying work. If a quote is presented, compare the appointing owner, included inspections and documents, exclusions, VAT treatment and basis for any further 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 Hammersmith and Fulham adoption statements, adopted guidance, current consultation page, conservation and Article 4 material, and sections 1 to 3 and section 6 of the Party Wall etc. Act 1996 were checked on 24 August 2026. Planning status, property designations and mapped boundaries can change; verify the complete address against current official records.