Schedule of Condition for London Party Wall Works: What It Is and Why You Need One

**What is a schedule of condition?**

• A schedule of condition is a formal record of the physical state of a property (or specific elements of it) at a particular point in time — typically immediately before construction works begin. It consists of:
• •Photographs: a systematic photographic record of all rooms, walls, ceilings, and external elements that could plausibly be affected by the proposed works. For a loft conversion or rear extension, this typically means: all rooms in the adjoining property (interior walls, ceilings, floors adjacent to the party wall; the loft void if accessible; the rear elevation); any party wall or boundary structures; any garden features near the proposed works
• •Written descriptions: a room-by-room narrative describing the condition of each element, noting existing cracks, plaster defects, damp patches, and any pre-existing damage
• •A plan: a sketch plan of the adjoining property showing the rooms covered and where each photograph was taken (enabling the photographs to be geographically oriented)
• •Date and signature: typically signed or certified by the party wall surveyor(s) who prepare it

The schedule of condition is then retained by both the building owner and the adjoining owner, and forms part of the party wall award documentation.

**When is a schedule of condition prepared?**

A schedule of condition should be prepared:

*Before any party wall works commence*: The schedule must be prepared BEFORE works start — a schedule prepared after the works have begun (or after a crack or defect has appeared) is not useful as a baseline record. The survey visit for the schedule of condition is typically arranged by the party wall surveyor when the party wall award is being prepared — usually during the week or two before the construction programme begins.

*When is a schedule of condition required vs. strongly recommended?*

• •*Required*: Where the party wall award specifically requires a schedule of condition as a condition of consent for the works. Most competent party wall surveyors will include a schedule of condition requirement in any party wall award for works involving significant excavation, structural alteration, or removal of shared chimney stacks.
• •*Strongly recommended*: For any London extension or loft conversion involving a shared party wall, even where the party wall surveyor has not formally required one. The cost (£200–£500 for a schedule of condition survey of one adjoining property) is negligible compared to the cost of a dispute about construction damage.

*What happens if the adjoining owner refuses access for the schedule of condition?*

The Building Owner has a right under Section 8 of the Party Wall etc. Act 1996 to enter the adjoining owner's land for the purpose of carrying out work permitted by the Act, including survey work. If the adjoining owner refuses access for the schedule of condition survey, the surveyor can apply to a magistrates' court for an order requiring access under Section 8(6). In practice, refusal is very rare — most adjoining owners understand that the schedule of condition protects their interests as well as the building owner's.

**What types of works most warrant a schedule of condition?**

The works that most warrant a thorough schedule of condition are those that have the greatest potential to cause movement or vibration in the adjoining structure:

*1. Deep excavation near the party wall boundary (Section 6 of the Party Wall Act)*: Where excavation for an extension foundation will go below the foundation level of the adjoining owner's property, or within 3 metres of it at the same depth or lower, a Section 6 notice is required. These works have the highest potential to cause movement in the adjoining structure — and the schedule of condition is particularly important here.

*2. Loft conversion works involving the party wall*: A loft conversion dormer typically requires: removing existing chimney breast above the party wall; cutting into the party wall for new floor beams or RSJ bearing pads; or removing the chimney at party wall level. Any of these creates a risk of causing cracking or movement in the adjoining loft space — which may only be discovered months later when the neighbour accesses their loft.

*3. Chimney breast removal below party wall level*: Where a chimney breast is removed from the building below the party wall (at first-floor or ground-floor level), the party wall above loses its vertical load support and a redistribution of loads occurs. This can cause cracking in the party wall and the adjoining property's internal plaster — the schedule of condition is essential here.

*4. Any works involving heavy plant or vibration near the party wall*: Breaking out existing concrete slabs, operating a mini-digger close to the party wall, or using a whacker plate to compact the base of a new extension floor — all of these create vibration that can loosen plaster in the adjoining property.

**Who can prepare a schedule of condition?**

A schedule of condition is typically prepared by one of the following:

*1. The party wall surveyor*: The most common arrangement in London. The party wall surveyor appointed by the adjoining owner (or the agreed surveyor where both parties agree on a single surveyor) visits the adjoining property to take the photographs and written record. The schedule of condition then forms an appendix to the party wall award.

Advantages: The surveyor is a qualified professional; the schedule carries weight in any subsequent dispute; it is integrated with the party wall award as a single document; the surveyor understands which elements are most likely to be affected by the specific works.

*2. A separate building surveyor*: Where no formal party wall award is being prepared (for example, for works that are close to but not quite triggering a Section 6 notice, or where the homeowner wants an independent record before starting works that will not formally require party wall consent), a separate building surveyor can be instructed to prepare a standalone schedule of condition.

*3. The principal contractor's own schedule*: For lower-value projects, or where the adjoining owner is comfortable with a less formal record, the principal contractor may produce a photographic schedule of condition themselves — visiting the adjoining property before works start, taking systematic photographs with a smartphone, and sending the photo set to the adjoining owner. This is not as professionally documented as a surveyor-prepared schedule, but it is far better than no record at all.

**What does a schedule of condition cost in London (2025)?**

| Type of schedule | Typical cost range | |---|---| | Party wall surveyor-prepared schedule (single adjoining property, 1–2 hours) | £200–£500 | | Party wall surveyor-prepared schedule (included within overall party wall award package) | Often included — confirm with surveyor | | Separate RICS building surveyor-prepared schedule | £300–£600 | | Schedule prepared by principal contractor (photographic record only) | Typically no additional charge |

Note: party wall surveyor fees are recoverable from the building owner (the homeowner doing the works) — not from the adjoining owner. If the adjoining owner has appointed their own surveyor, both surveyor fees are recoverable from the building owner.

**What should a good schedule of condition cover for a London loft conversion or extension?**

For a standard London Victorian terrace loft conversion (rear dormer), a good schedule of condition for the adjacent property should cover:

• *Loft void (if accessible)*:
• •Overall condition of party wall in loft (any existing cracks, gaps at chimney, loose mortar)
• •Condition of roof structure and any existing timbers close to the party wall
• •Any existing chimney breast condition

• *First-floor level*:
• •All walls adjacent to or near the party wall: plaster condition, any existing cracks, damp patches
• •Ceiling above first floor (particularly if chimney breast removal or new RSJ above ceiling is planned)
• •Party wall-adjacent bedroom: walls, ceiling, window reveals

• *Ground-floor level*:
• •All rooms with party walls or rear walls affected by the rear extension (kitchen, rear reception)
• •Ground-floor ceiling (if structural opening above)

• *External*:
• •Rear elevation of the adjoining property: any existing cracks in the brickwork, mortar condition, existing rendering condition
• •Boundary wall or fence condition (particularly if any excavation near the boundary is planned)
• •Garden surface near the boundary (if excavation for extension foundation could affect the adjoining garden or structures)

• *The photographs should*:
• •Be systematic (cover every area described in the written schedule)
• •Include a ruler or scale card where cracks are photographed, so any widening can be measured later
• •Be geolocated (most modern smartphones embed GPS coordinates in EXIF data — this is useful evidence)
• •Be timestamped (date of the survey clearly recorded)

**How the schedule of condition protects the building owner (the homeowner doing the works)**:

The schedule of condition protects the building owner by providing a clear factual baseline from which any new damage can be identified. In a dispute about whether damage to the adjoining property was caused by the works, the building owner's surveyor can point to the schedule of condition and say: 'This crack at the party wall joist level is recorded in the schedule of condition taken before the works started — it predates the works.' Without the schedule, this defence is not available.

• Common disputes that the schedule of condition prevents or resolves:
• •'That crack in my bedroom wall appeared after your builders started' — the schedule shows whether the crack was pre-existing or is genuinely new
• •'Your excavation has caused my garden wall to lean' — the schedule records the condition and alignment of the garden wall before works started
• •'My chimney in the loft has been damaged by your loft conversion' — the schedule shows the pre-works condition of the chimney

**How the schedule of condition protects the adjoining owner**:

The schedule of condition also protects the adjoining owner by creating a documented record that can be used to claim for genuine damage caused by the works. Under Section 7 of the Party Wall Act, the building owner is liable to make good any damage caused to the adjoining owner's property by the notifiable works. But the adjoining owner must be able to prove that the damage was caused by the works — which requires demonstrating that it did not exist before the works started. The schedule of condition is the adjoining owner's primary evidence for this claim.

**What happens if damage is discovered and there is no schedule of condition?**

• Without a schedule of condition, a dispute about whether a crack or defect was caused by the works becomes a matter of assertion — each party claims their version of events. This almost always leads to:
• •Disagreement between the respective surveyors about causation
• •Either a negotiated settlement (typically the building owner pays something to 'make the problem go away' regardless of whether they caused it)
• •Or in serious cases, a legal dispute in the County Court, where the costs of the litigation significantly exceed the cost of the damage in dispute

The schedule of condition is a small investment (£200–£500) that saves a much larger potential cost in both money and goodwill.

**The relationship between the schedule of condition and the party wall award**:

• The party wall award is the formal document that gives the building owner consent to carry out the notifiable works. The party wall award will typically:
• •Set out the works that are permitted under the award
• •Impose conditions on how the works are carried out (working hours; methods of construction; specific requirements for protecting the party wall during excavation)
• •Reference the schedule of condition (and attach it as an appendix)
• •Specify that the building owner must make good any damage to the adjoining owner's property identified during the post-works inspection by comparison with the schedule of condition

The post-works inspection is a further visit by the party wall surveyor after the works are complete, at which the surveyor compares the current condition of the adjoining property against the pre-works schedule of condition. Any new damage identified during this comparison is recorded and the building owner is required to make good.

**RCB's approach to schedules of condition**:

For all London extension and loft conversion projects involving party wall works, RCB's pre-construction team ensures that a schedule of condition is prepared before works begin — either coordinating with the client's party wall surveyor or, where the client prefers, arranging a standalone photographic schedule. This is part of the pre-construction information pack and is not treated as an optional extra. The schedule of condition is one of several pre-construction steps that protect the client's position and maintain the working relationship with the neighbouring property.