What is the Party Wall Act 3 metre rule?


The Party Wall act covers excavations within 3 metres of an Adjoining Owner, if the lowest point of the excavation will be lower than the underside of the footings to the party wall (or parts of their property which are within three metres of the proposed excavation).

Therefore, if the proposed excavation will exceed the depth of any existing footings, then a Notice will need to be served, by the legal owner of the land who is instigating the building works.

In order to be valid, a ‘Three Metre’ Notice will also need to include a section drawing, showing the depth of the new excavations proposed, and its position relative to pre – existing property.

Experienced party wall Surveyors will make a reasoned assumption about the depth of the existing foundations to a property, based on its date of construction, and other factors.

In some instances, a trial pit is dug, to ascertain the existing foundations, but this may be carried out to verify design assumptions, once the party wall process is further forward.



Dealt with James Brook, very efficient and professional, James had the report sent out to us within 24hrs. would highly recommend.
Party Wall Act 3 metre rule
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09:46 22 Aug 19
Harding Chartered Surveyors are a very professional business who handled a challenging task for us with ease. I highly recommend them and will be using their services again.
Party Wall Act 3 metre rule
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10:34 20 Jul 19
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Party Wall Act 3 metre rule
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22:30 01 Jul 19
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Party Wall Act 3 metre rule
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22:30 01 Jul 19
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Party Wall Act 3 metre rule
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10:38 24 Jun 19
Have used for years and always been very happy. Competitive on service and always good on deadlines and quality. Recommended.
Party Wall Act 3 metre rule
Neill Ghosh
14:22 11 Jun 19
The surveyor turned up on time as planned to survey the roof, both inside and out, then was happy to discuss it all with us afterwards. Bit tricky in high winds. Report arrived 2 days later, just what we needed. Professional and thorough. Recommended.
Party Wall Act 3 metre rule
Kevin Loughlin
20:27 28 Mar 19
Quick, responsive and very thorough. Would definitely recommend Hardings to others, and will come back to them the next time I need a survey completed.
Party Wall Act 3 metre rule
Jon Brennan
09:44 01 Mar 19
Quick, efficient and excellent service. Came as a recommendation from a friend and we’d happily recommend too.
Thorough and professional surveyors. Very happy with their service. Highly recommended.
Party Wall Act 3 metre rule
A Google User
16:25 16 Dec 18
Good, thorough, and promptly scheduled homebuyer survey in Fulham. The surveyor called me and explained everything clearly.
Party Wall Act 3 metre rule
A Google User
15:54 10 Nov 18
We had two homebuyers surveys conducted by James. He was extremely knowledgeable, transparent and went the extra mile to inform my girlfriend and I of the results of each survey. Would highly recommend.
Party Wall Act 3 metre rule
A Google User
14:12 18 May 18
I highly recommend David. Very good technical knowledge. He was always available for our questions, which included a detailed call on the same day as the survey. The written survey report was clear, detailed and included pictures and estimates of the cost of repairs.
Party Wall Act 3 metre rule
A Google User
10:41 29 Apr 18
David gave us a fantastic service and has been a huge help during our property purchase process. We have had 2 surveys carried out, both of which were arranged very promptly. Thorough and extremely useful telephone calls and full written reports were received shortly afterwards. David's reports and advice have been invaluable to us.
Party Wall Act 3 metre rule
A Google User
11:16 09 Jan 18
I have worked with David and his team as a buying agent for many years now. The service they offer is an excellent one, timely with a commonsensical approach. I would recommend them to anyone.
Party Wall Act 3 metre rule
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14:13 08 Jan 18
Very experienced firm and friendly staff. Highly recommended.
Party Wall Act 3 metre rule
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Party Wall Act 3 metre rule
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06:36 28 Apr 17
Party Wall Act 3 metre rule
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22:03 24 Apr 14
Party Wall Act 3 metre rule

At Harding Chartered Surveyors, we’re a team of independent and impartial RICS surveyors that can carry out party wall matters. If you have any questions or need advice don’t hesitate to call us on 020 3598 6730.

Party Wall Act 3 metre rule
Why us?

  • Independent firm of RICS Chartered Surveyors

    Established in 1997, Harding Chartered Surveyors have helped thousands of families, individuals and businesses with their property needs for over two decades.

  • Expert Property Advice

    The Harding’s team consists of RICS Chartered Surveyors and registered valuers with expertise in Building Surveys, Valuation, Leasehold Reform, Party Wall matters, Taxation valuation, and Expert witness.

  • In-depth Reports & Recommendation

    Comprehensive reports featuring written reports, photographs and quotes for any required works. Our Chartered Surveyors use advanced equipment, such as Pole Cams, to inspect every accessible nook and cranny of the property.

  • Excellent Customer Service

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