Why can chimney breast removal involve Party Walls?
In many older houses, chimney breasts and flues form part of the shared masonry between two properties.
Removing a chimney breast may involve cutting into the party wall or altering masonry that forms part of the party structure.
These are circumstances where Section 2 of the Party Wall etc. Act 1996 may apply.
Party wall and chimney breast
Illustrative diagram — not to scale.
What if I'm removing only my side?
Removing a chimney breast from your own room doesn't automatically mean the Party Wall Act is irrelevant.
The important question is whether the work affects the shared party structure and what construction is proposed.
The extent of masonry removal and support arrangements should be established from the drawings.
What about structural support?
If chimney masonry remains above the area being removed, appropriate structural support may be necessary.
That design is the responsibility of the structural engineer and must meet the applicable Building Regulations requirements.
The Party Wall process does not replace structural design or Building Control approval.
Chimney breast removal — before and after
Illustrative diagram — not to scale.
When should Notices be served?
Where the work is notifiable under Section 2, a Party Structure Notice normally needs to be served at least two months before works begin, unless an earlier start is agreed in writing.
If the adjoining owner dissents or a dispute is deemed to have arisen, surveyor appointments and an Award may be required.
What should you do next?
If you're planning chimney breast removal, send us the drawings and structural information so we can review the Party Wall position.
Related guide: Loft conversions and Party Walls
