What Does a Party Wall Surveyor Do — and Do You Need One?
If you're planning works that affect a shared wall, excavate near a neighbour's foundations, or build close to a boundary, the Party Wall etc. Act 1996 requires you to serve formal written notice on your neighbours before starting. A party wall surveyor manages this process — but many homeowners are unclear about when they need one, what they actually do, and what it costs.
When Does the Party Wall Act Apply?
The Party Wall etc. Act 1996 applies in three main situations:
Party structure notice: works to a shared wall or floor — including cutting into it, raising or underpinning it, or demolishing and rebuilding it. This covers all work to party walls between semi-detached and terraced houses, and to floor/ceiling structures in flats.
Line of junction notice: building a new wall at or near the boundary with a neighbour's property.
Three-metre and six-metre notices: excavating within 3 metres of a neighbour's structure (if excavating to the same level or lower than their foundations) or within 6 metres (if excavating to a depth below a line drawn at 45 degrees from the base of their foundation). This commonly applies to extension foundations and basement works.
What Happens After Notice Is Served?
Once notice is served, the neighbouring owner (called the adjoining owner) has 14 days to respond. They can consent — in which case no further process is required — or dissent, which triggers the appointment of surveyors. They can also not respond, which is deemed dissent.
If the adjoining owner dissents, either one agreed surveyor is appointed by both parties, or each party appoints their own surveyor. The surveyors then agree and serve a Party Wall Award — a legally binding document that sets out the works to be carried out, the conditions, a schedule of condition of the adjoining property, and how any damage is to be dealt with.
What Does a Party Wall Surveyor Actually Do?
The surveyor (or surveyors) inspect the adjoining property before works start to record its existing condition — cracks, finishes, and any pre-existing defects. This schedule of condition is the baseline against which any damage claim is assessed during and after the works.
During the works, either party can call the surveyor to inspect if they believe the conditions of the Award are being breached. At completion, any damage claims are assessed against the pre-works condition schedule.
What Does It Cost?
Party wall surveyor fees are typically charged by the building owner (the one carrying out the works). Costs vary significantly depending on the complexity of the works and the degree of dispute, but typical fee ranges are: simple Award with a single adjoining owner: £800–£1,500; more complex projects or difficult neighbours: £1,500–£4,000 or more per neighbouring owner; if the adjoining owner appoints their own surveyor (who the building owner typically pays), double these figures for each party.
How to Keep Costs Down
Speak to your neighbours before serving formal notice. A good working relationship and an early conversation can result in a simple consent being signed, which avoids the Award process entirely and eliminates surveyor costs on both sides. Where that's not possible, appointing an agreed surveyor acting for both parties is more efficient than each party having their own.
RCB manages party wall notice serving and coordination as part of our pre-construction process, and can recommend specialist party wall surveyors where formal Awards are required.
07359 872594 | contact@rcbgroup.co.uk | www.rcbgroup.co.uk