Demolition Near Boundaries Sydney: Party Walls, Fences and Neighbour Damage

Most demolition arguments end up at the boundary line — shared walls, fences, encroachments and neighbour damage. Here's what the law and the practical job actually require.

Boundary work is where demolition gets legal. Sydney's older inner suburbs are full of party walls, encroaching fences, shared driveways and gutters that overhang the line. Get any of this wrong and the next call is your neighbour's lawyer.

Party Walls

Walls that sit on the boundary line and support both buildings are party walls. You generally cannot demolish a party wall without the adjoining owner's written consent (and sometimes a court order). In a terrace house demolition, the party wall is the most expensive single legal complication on the job.

Encroachments

Often we find the house, gutter, eaves or footings sit over the boundary by 20–200mm. The demolition still requires consent because we're working over your neighbour's airspace, even if the encroachment is decades old. A survey is almost always worth doing before quote.

Fences

The Dividing Fences Act NSW 1991 says you and your neighbour each own half the boundary fence. If the fence has to come down for demolition access:

Get written consent
Document the existing condition with photos
Agree replacement standard up front (timber, colorbond, height, palings)
Schedule replacement before demolition handover where possible

Damage Claims

The most common boundary disputes after demolition are: damaged garden beds, broken neighbour fence palings during machinery access, cracked render on a shared wall, and dust on solar panels. Cover all four with photo evidence before work starts.

Neighbour Notifications

Even when consent isn't legally required, a courteous notification 1–2 weeks before demolition prevents most complaints. We provide a one-page template you can letterbox the neighbours with start date, working hours and contact details.

What We Do at Boundaries

Survey the line before quote where there's any doubt
Saw-cut clean separation between demolished slab and remaining boundary slab
Hand-demolish brick within 600mm of any kept boundary wall
Protect adjoining boundary fences with hoarding or temporary fencing
Damp-down dust during boundary work
Schedule loud work between 9:00 and 16:00 to keep neighbours sweet

Frequently Asked Questions

Do I need a neighbour's consent to demolish my own house?

Not for the house itself if it's free-standing on your block. You do need consent for any work that affects shared walls, fences or boundary infrastructure.

What if my neighbour refuses to allow boundary work?

You may need NCAT or court orders to force party-wall access. We can work with your lawyer to document the work plan needed for the application.

Who's liable if my demolition damages the neighbour's house?

The demolisher and the property owner (you). This is why $20M Public Liability is the Sydney standard and why we photograph everything before work starts.

Demolition Near Boundaries Sydney