Quick answer: Work in a flat can require notice to more than the person next door. Depending on the leases and ownership, adjoining owners may include neighbouring leaseholders and relevant freeholders. Floors and ceilings separating flats can be ‘party structures’ under the Act.
This article concerns England and Wales. It provides general information, not legal advice. The application of the Party Wall etc. Act 1996 depends on the facts, ownership and proposed work.
Party structures in flats
The Act extends beyond walls. Floors, ceilings and other structures separating separately occupied parts of a building can be party structures, so structural alterations in one flat may be notifiable.
Identify the owners
Check Land Registry titles, leases and management information. There may be several adjoining interests above, below and beside the proposed work, plus freehold interests.
Lease and licence requirements
A party wall notice does not replace landlord consent, a licence to alter, planning permission or building-regulations approval. Each process should be planned separately.
Typical flat alterations
Notifiable works may include cutting steelwork into party structures, removing structural walls or chimney breasts, altering separating floors and excavating for lower-ground-floor or basement works.
Frequently asked questions
Is the managing agent automatically the adjoining owner?
Not necessarily. The legal ownership and lease structure must be checked.
Does the freeholder’s consent replace neighbour notices?
No. Landlord consent and the Act are distinct and different people may hold the relevant rights.
Authoritative sources and further help
Read the official GOV.UK explanatory booklet and the Party Wall etc. Act 1996 on legislation.gov.uk. For the wider process see our building owners guide, adjoining owners guide and notice guidance.
Reviewed: 16 July 2026. Seek advice from a suitably experienced party wall surveyor or solicitor where the facts or legal position are disputed.