Party Wall Surveyor Knightsbridge | Fixed Fees From £165

Grey & Associates are party wall surveyors in Knightsbridge, covering SW1X and Hans Town, Lowndes Square, Sloane Street, the Brompton Road and the border with Chelsea and Belgravia. We act for owners building and for owners who have received a notice. Fixed fees start at £165 + VAT per adjoining property.

Key takeaway

Knightsbridge is not a terrace-and-boundary-wall district — it is a mansion-block and grand-terrace district, and that changes the questions. Most projects here involve a separating floor, a structural frame, a lateral conversion or a shared staircase rather than two houses either side of a brick wall. Ownership is heavily leasehold, with estate and institutional freeholds, and a significant number of adjoining owners live overseas. The practical result is that the hard part of a Knightsbridge case is usually working out who the adjoining owners are and serving them properly, not the engineering.

If you own a flat in a block and a notice has arrived, the position is usually better than people assume: in a dispute the Building Owner pays the reasonable fees of both sides' surveyors.

What makes Knightsbridge different

The party structure is often a floor, not a wall

In a Knightsbridge mansion block the works are frequently internal: a lateral conversion joining two flats, a new staircase, a strengthened or replaced separating floor, or alterations to the structural frame. The Act is not limited to walls — a floor or other structure separating buildings, or parts of a building approached by separate staircases or separate entrances, can be a party structure, which brings section 2 into play — so these projects are not outside the party wall process simply because no external wall is touched. Owners who assume "it is all inside my flat, so no notices are needed" are usually wrong, and often discover it after the work has started.

Finding the adjoining owner is the real work

A large share of the housing here is held on long leases with the freehold in estate or institutional ownership. The person living next door may be a tenant with no interest in the party structure at all, while the interest that matters is held by a landlord, a trust or an estate office. Added to that, a significant number of owners are based overseas. In practice this means notices go to a registered title address, a managing agent or a solicitor's office rather than to a front door. Where an adjoining owner does not respond, the process can still continue — a surveyor can be appointed to act for them, and that surveyor must act impartially rather than as the building owner's representative. Getting this right at the start is what keeps a Knightsbridge project on programme.

The remaining houses and their basements

Knightsbridge also retains substantial houses in single ownership, particularly around Lowndes Square and Hans Town, and those schemes are as deep as anything in Kensington or Chelsea. A basement under one of these houses routinely involves section 6 excavation, temporary works to support the neighbouring structure, and — where flats have been carved out above — several adjoining owners inside the same building as well as next door.

Basements, underpinning and structural work

Where a Knightsbridge project goes below ground or into the structure, four issues govern it.

Section 6 is triggered early. Notice at least one month before excavation begins where the dig is within three metres of a neighbouring structure and deeper than its foundations, or within six metres where it would cut a 45-degree line from the bottom of those foundations. In a densely built district, most basement schemes meet the first test without effort.
The duty to compensate is not fault-based. Section 7 requires the building owner to compensate the neighbour for loss or damage caused by work executed under the Act, so damage from the excavation is compensable whether or not anyone was negligent. That is what makes the pre-works record decisive rather than merely useful.
Neighbouring basements and vaults change the datum. Below-ground space is common in this area, and existing tanking, sumps, pumps, vaults and drainage all form part of what has to be recorded. Water ingress is one of the two claims that most often follows a neighbouring excavation.
Structural works in blocks need the whole building considered. Strengthening a separating floor or altering a frame affects flats above and below, the common parts and the freeholder's structure, so the award has to address more than one interest and more than one property.

Basement and underpinning work is quoted separately from the fixed fees, after we have read the structural drawings and method statement. Our basement and underpinning party wall page covers how we run those schemes.

Fees for party wall work in Knightsbridge

Fixed and published: £165 + VAT per adjoining property to serve notice, £620 + VAT per Schedule of Condition, and £350 + VAT per adjoining property for an award acting for the Building Owner. A one-neighbour dispute — notices, one Schedule of Condition and the award — is £1,135 + VAT. All prices exclude VAT, charged at 20%: the £1,135 figure carries £227 of VAT, so £1,362 including VAT.

Basement, underpinning and multi-interest works are priced differently. Where a project has several adjoining owners, the fixed figures apply per adjoining property, and where the works go below ground the scheduling and engineering input put the case outside those figures altogether. We review your plans and the proposed works first, then present a formal written quote before anything is agreed or any notice is served. Dispute and non-compliance work is charged separately at £185 per hour plus VAT. Nothing in this section is an offer.

The full breakdown, including the statutory position on who pays for both sides' surveyors, is on our London party wall surveyor page.

Knightsbridge party wall questions

I am working on the floor between two flats in Knightsbridge. Does the Party Wall Act apply to a separating floor?

It can, and often does. The Act is not confined to vertical walls: a floor or other structure separating buildings, or parts of a building approached by separate staircases or separate entrances, can be a party structure, so works such as strengthening, cutting into or replacing a separating floor can fall within section 2. In a Knightsbridge mansion block, those works also normally involve the freeholder or management company because the structure is theirs, and a leaseholder whose flat is affected by the work is an adjoining owner in their own right. We establish who holds which interest before serving, because a separating-floor project can have several adjoining owners and each needs their own notice.

The owner of the flat next door is overseas. Can the party wall process still proceed?

Yes. An overseas owner, a trust or an estate is usually reachable through the freeholder, the managing agent or the registered title address, and the notice is served on the interest rather than on whoever is living there. Where an adjoining owner does not respond within the statutory period, the Act allows the process to continue: a surveyor can be appointed to act for them. That surveyor is not the building owner's representative: a surveyor appointed to act for an adjoining owner is held to act impartially, and has to weigh the adjoining owner's interests as well as the building owner's. That safeguard is why a case with an absent owner does not have to stall.

My Knightsbridge house has two flats above it and I want to dig a basement. How many adjoining owners do I have?

Possibly several. Where a house has been converted, the flat that touches your work, the flat above it and the freeholder can each hold a separate interest, so a single basement scheme may need notices on more than one party. The basement itself is section 6 work — notice at least one month before excavation begins, because the dig passes below the neighbouring foundations and meets the three-metre and 45-degree tests. Where the shared wall is also cut, underpinned or altered, section 2 applies and the notice period is two months.

What does a party wall surveyor cost in Knightsbridge?

Fixed fees: £165 per adjoining property to serve notice, £620 per Schedule of Condition, and £350 per adjoining property for an award acting for the Building Owner. A one-neighbour dispute — notices, one Schedule of Condition and the award — is £1,135 all-in. All figures exclude VAT at 20%. Basement and underpinning works, and multi-interest cases with several schedules and awards, are priced differently and quoted in writing after we have reviewed the plans and the proposed works.

Talk to a Knightsbridge party wall surveyor

Grey & Associates have worked exclusively on the Party Wall etc. Act 1996 since 2008, including mansion-block, leasehold and basement schemes across SW1X. The first conversation is free.

Fixed fees per adjoining property, agreed before work starts.
Title checks before serving, so no interest is missed.
Experience of separating floors, structural frames and basements.
Representation for owners building, and owners who have received a notice.

Call 020 8150 3762 or email info@greyandassociates.co.uk.

Nearby: Chelsea, Kensington, Hammersmith, Chiswick and Ealing. The wider picture is on our West London party wall surveyor page.

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Party Wall Surveyor in Knightsbridge