Agreed Surveyor or Two Surveyors? The £650 vs £850 Decision Explained
Should you and your neighbour share one Agreed Surveyor (£650) or appoint two (£850)? A plain-English comparison with 2026 fixed fees for the South West and Thames Valley.
This guide is part of our party wall surveyors in South West & Thames Valley hub — fixed fees, local coverage and a free 60-second eligibility check.
Once a neighbour dissents to your party wall notice, the Act gives you exactly two routes: one Agreed Surveyor acting impartially for both owners, or two surveyors, one appointed by each owner. The choice affects your cost, your timescale and, occasionally, how comfortable your neighbour feels about the whole project.
The short answer
- Agreed Surveyor — £650 all in. One impartial surveyor, one Schedule of Condition, one Award. Fastest and cheapest.
- Two surveyors — £850 for our side, plus the adjoining owner's surveyor's reasonable fees, which the building owner also pays.
Our free 60-second eligibility checker tells you which sections of the Act apply to your South West & Thames Valley project and the exact fixed fee — no obligation.
Both routes produce a legally identical Party Wall Award. Neither gives the building owner an advantage: an Agreed Surveyor has a statutory duty to act impartially, not for whoever is paying.
When an Agreed Surveyor is the right call
- You and your neighbour are on good terms and the works are routine — a loft steel, a rear extension, a standard Section 6 excavation.
- The adjoining property is in obviously sound condition and both owners are comfortable with a single Schedule of Condition.
- You want the Award in weeks, not months. One surveyor means no inter-surveyor correspondence.
When two surveyors is worth the extra
- Basement or underpinning works in Bath, Bristol or Oxford, where the risk of settlement damage is real and the adjoining owner wants their own eyes on the design.
- Historic or listed property — Cheltenham Regency terraces, Cotswold stone in Cirencester, Georgian Bath — where damage disputes get expensive.
- The relationship is already strained. An adjoining owner who feels unheard will hold up an Agreed Surveyor appointment anyway.
- Multiple adjoining owners with different concerns on either side of a terrace.
What the adjoining owner pays: nothing
Under Section 10, the building owner pays the reasonable fees of both surveyors. So if you're the adjoining owner, appointing your own surveyor costs you £0 — see who pays for a party wall surveyor. That is why most adjoining owners in Swindon, Reading and Oxford choose their own appointment.
How to propose an Agreed Surveyor properly
Your notice should offer the Agreed Surveyor option by name and give the neighbour a genuine choice — an offer that reads like pressure usually backfires. The neighbour must confirm the appointment in writing; a verbal nod is not an appointment and an Award signed on that basis is challengeable.
Timescales
- Agreed Surveyor: typically 2–3 weeks from dissent to Award.
- Two surveyors: typically 4–8 weeks from dissent to Award.
Both usually run inside the statutory notice period (two months for Section 2, one month for Section 6), so serving early means neither route delays your builder.
Get the numbers for your project
Our 60-second checker prices both routes for your actual address and scope of works — first notice £50, each additional £30, Agreed Surveyor £650, full Award £850 — with no travel charges anywhere in our 70-mile coverage area.
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