Do You Need a Party Wall Agreement for Loft Conversion?
Hourican & Associates Ltd |
Expert advice from Hourican Associates on party wall agreements, timelines, costs, and your legal obligations when planning a loft conversion in London.
When Does a Loft Conversion Require a Party Wall Agreement?
You will typically need a party wall agreement if your loft conversion includes any of the following:
- Inserting steel beams into a shared party wall
- Raising or extending the party wall for a new gable end
- Cutting into the wall for structural support (e.g. dormer floor joists)
- Chimney breast removal affecting a shared stack
- Excavation work within 3m of a neighbour’s foundations
What is a Party Wall Agreement?
A party wall agreement, also known as a Party Wall Award, is a legal document that sets out how building works will be carried out to protect both you and your neighbour.
- Details of proposed work
- Access and working hours
- Condition of neighbouring property (via a Schedule of Condition)
- Dispute resolution process
How Hourican Associates Can Help
Hourican Associates are Chartered Party Wall Surveyors operating throughout London. We offer:
- Party Wall Notices: £65 + VAT per neighbour
- Schedule of Condition: £450–£650 + VAT
- Expert Party Wall Awards: £1,000–£1,500 + VAT
We are fully accredited by RICS, FPWS, CIOB and the Pyramus & Thisbe Society. Contact us today for party wall advice.
Party Wall Timeline for Loft Conversions
| Stage | Timeframe |
|---|---|
| Serve Party Wall Notice | Day 0 |
| Neighbour response period | Day 1–14 |
| Surveyors appointed (if disputed) | Day 15–30 |
| Party Wall Award agreed | ~Day 30–60 |
| Work can commence | After Award served |
What If My Neighbour Doesn’t Consent?
If your neighbour disputes the notice or does not respond, it triggers a party wall dispute. You must then appoint surveyors to agree an Award before work can proceed.
- Agreed Surveyor: one surveyor for both parties (faster, cheaper)
- Two Surveyors: one for you, one for your neighbour (if they prefer)
Areas We Cover
We provide expert party wall services across North, South, East and West London, including:
- North: Camden, Islington, Haringey
- South: Clapham, Wandsworth, Merton
- West: Chelsea, Kensington, Fulham, Chiswick
- East: Hackney, Tower Hamlets, Stratford
Frequently Asked Questions
Not always. Only if your loft conversion impacts a shared wall or involves excavation near your neighbour's foundations.
You could face legal action, project delays, and personal liability for any damage to adjoining properties.
Typically between £1,000 and £1,500 + VAT, depending on complexity and number of surveyors appointed.
Need Help With a Loft Conversion Party Wall Agreement?
As chartered party wall surveyors in London, Hourican Associates can help.
We cover all areas of London including Fulham, Chiswick, Chelsea, Camden, Islington, and more.
Request a Free Party Wall Quote NowDisclaimer: All cost estimates are indicative only and may vary depending on the nature, scale and location of your project. Legal obligations under the Party Wall etc. Act 1996 should always be confirmed with a qualified party wall surveyor. For formal advice, we recommend booking a consultation.
Richard Hourican, Company Director
BSc (Hons). HND Build. MCIOB. C.Build E MCABE. ARICS. MFPWS. MPTS
As a specialist Party Wall surveyor, Richard Hourican will protect your interests during building works.
Are you planning a building project – perhaps an extension, loft conversion or basement – that is on or adjacent to your property’s boundary line? Or has a ‘Party Wall’ notice dropped on the doormat informing you of a neighbour’s impending works?
It’s essential to understand all the implications of building plans. If you don’t, it could cost thousands. Our job is to ensure everything is done correctly – and that it doesn’t!
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