The Party Wall Act: A Plain-English Guide for Hounslow Homeowners

If you own a terraced or semi-detached house in Hounslow — or a flat — the chances are that at some point you'll need to know about the Party Wall etc. Act 1996. Whether you're planning a loft conversion, a rear extension, a new fence or any excavation near your boundary, this legislation could apply to you. Here's our plain-English guide to everything you need to know.

What Is the Party Wall etc. Act 1996?

The Party Wall etc. Act 1996 is a piece of UK legislation that provides a framework for preventing and resolving disputes between neighbours in relation to party walls (shared walls), boundary walls, and excavations near neighbouring buildings. It applies throughout England and Wales.

Hounslow, with its high density of terraced and semi-detached properties, is exactly the kind of area where the Act comes into play regularly. Loft conversions, rear extensions, basement excavations and even some fence replacements can trigger its requirements.

When Does the Act Apply?

The Act applies to three main categories of work:

• Party structures: Works to a wall, floor or ceiling shared with a neighbour — including cutting into it, underpinning it, making good defects or demolishing and rebuilding it
• New walls on the boundary: Building a wall astride or along a property boundary line
• Excavations near neighbouring buildings: Excavations within 3 metres of a neighbouring structure if you intend to go deeper than the neighbour's foundations, or within 6 metres under a 45-degree line from the neighbour's foundations

Serving a Party Wall Notice

If your works fall under the Act, you must serve a Party Wall Notice on your adjoining owner (or owners) before works begin. The specific notice period depends on the type of work:

• Works to party structures: 2 months' notice
• New walls on the boundary: 1 month's notice
• Excavations near neighbouring buildings: 1 month's notice

The notice must include your name and address, the address of the building where works are proposed, a description of the proposed works, and the intended start date.

"Failing to serve a Party Wall Notice before starting notifiable works is one of the most common — and costly — mistakes homeowners make. Works can be injuncted, and you can be liable for your neighbour's legal and surveying costs." — James Henderson, Hounslow Surveyors

What Happens When the Neighbour Responds?

Once a Party Wall Notice is served, the adjoining owner has 14 days to respond. They can:

• Give consent: Work can proceed — no surveyors required
• Dissent and agree to appoint an Agreed Surveyor: One surveyor acts for both parties
• Dissent and appoint their own surveyor: Each party appoints their own surveyor, who together appoint a Third Surveyor as a backstop
• Not respond: After 14 days, a dispute is deemed to exist and surveyors must be appointed

What Is a Party Wall Award?

A Party Wall Award (technically called a "Party Wall Award" or "Award") is a legal document drafted by the appointed surveyor(s) that sets out the rights and responsibilities of each party. It describes the permitted works, the method of working, working hours, insurance requirements, and the condition of the adjoining property before works begin.

Once an Award is made and agreed, works can proceed in accordance with its terms. Any damage caused during the works that is covered by the Award must be made good by the building owner at their cost.

The Importance of a Schedule of Condition

Before any notifiable works begin, it's strongly advisable to have a Schedule of Condition of the adjoining property prepared. This photographic and written record of the neighbouring building's state at the start of the works is vital if any dispute about damage arises later. It's usually incorporated into the Party Wall Award itself.

Our surveyors prepare comprehensive Schedules of Condition as part of our party wall service — protecting both the building owner and the adjoining owner.

Party Wall FAQ