The Party Wall Act 1996 is one of those pieces of legislation that many homeowners only discover when they're about to start building works — and by then, they're already behind the curve. I've seen more disputes, delays and legal complications caused by failing to navigate the party wall process correctly than almost any other issue in residential property. So let's clear it up.
What Is the Party Wall Act?
The Party Wall Act 1996 provides a framework for preventing and resolving disputes between owners of neighbouring properties who are planning to carry out building work that may affect shared walls or boundaries. It applies in England and Wales.
It's important to note that the Act is not about planning permission — you can have planning permission for an extension and still need to serve notice under the Party Wall Act. They're entirely separate processes.
When Does the Party Wall Act Apply?
The Act is triggered by three main categories of work:
- Works to an existing party wall or party structure — including cutting into a party wall to insert beams or RSJs, raising or lowering a party wall, underpinning a party wall, or anything that involves structural work to a shared wall.
- New building at or astride the line of junction — building a new wall on or along the boundary with a neighbouring property.
- Excavations near a neighbouring property — digging within 3 metres of a neighbour's building to a depth lower than their foundations, or within 6 metres if the excavation will cut a line drawn at 45 degrees from the neighbouring foundations.
Common works that trigger the Act in Crawley and West Sussex include: single or double-storey rear extensions, loft conversions, basement conversions, and the insertion of steel beams into party walls during kitchen or structural alterations.
Serving a Party Wall Notice
If your works trigger the Act, you must serve written notice on all affected adjoining owners. The notice period depends on the type of works:
- Two months' notice for works to an existing party wall or party structure.
- One month's notice for new walls at the line of junction and most excavation works.
The notice must describe the proposed works, include drawings where necessary, and state the proposed start date. Your adjoining owners then have 14 days to respond.
What Happens When Neighbours Respond?
Your neighbours have three options:
- Consent in writing — the simplest outcome. They agree to the works and no further party wall procedure is required (though you should still consider a schedule of condition).
- Dissent and appoint an agreed surveyor — both parties appoint a single party wall surveyor to act for both sides. This is often the most cost-effective resolution.
- Dissent and appoint their own surveyor — each party appoints their own surveyor. The two surveyors then agree an award, or appoint a third surveyor if they cannot.
The Party Wall Award
Whether reached by an agreed surveyor or by two appointed surveyors, the Party Wall Award is a legally binding document that sets out the rights and obligations of each party. It typically includes:
- A description of the permitted works
- Working hours and methodology
- A pre-work schedule of condition of the adjoining property
- Arrangements for any damage that occurs
- The payment of surveyor's fees
Who Pays?
In most cases, the building owner — the person carrying out the works — is responsible for all reasonable party wall surveyor fees. The only exception is where the adjoining owner dissents and appoints their own surveyor unnecessarily, or makes unreasonable requests that add to the cost. As a rough guide, party wall surveyor fees in West Sussex typically range from £600–£1,500 per party, depending on the complexity of the works.
Getting Expert Party Wall Advice in Crawley
Our senior surveyor Tom Ellery has extensive experience handling party wall matters across Crawley, Horley, Horsham and the wider West Sussex area. Whether you're the building owner planning works or an adjoining owner who's been served notice, we can help. Find out more about our party wall services or contact us for a no-obligation discussion.
"Get the party wall process right from the start. The cost of appointing a party wall surveyor is trivial compared to the cost of a dispute that could halt your project or result in a legal claim."