Special Foundations Party Wall Consent London
Party Wall advice on reinforced underpinning, piles and other foundation arrangements that may engage the Act's special-foundation restriction.
What are special foundations under the Party Wall Act?
The Act defines special foundations as foundations in which an assemblage of beams or rods is employed for distributing load.
That definition can be relevant to reinforced underpinning, piled or other engineered foundation arrangements, but the actual detail needs to be reviewed rather than relying on a project label.
Most importantly, section 7(4) does not authorise a Building Owner to place special foundations on the land of an Adjoining Owner without that owner's previous written consent.
Review information
- Foundation and underpinning drawings.
- Reinforcement details.
- Boundary and land ownership relationship.
- Extent of any foundation below adjoining land.
- Existing notices or proposed section 1/2/6 works.
Special foundations need separate consideration
A Party Wall Award cannot simply override the written-consent requirement for special foundations beneath adjoining land.
Written consent
If special foundations are to be placed on or beneath adjoining land, the Adjoining Owner's previous written consent is required.
Surveyor jurisdiction does not remove the consent requirement
The Party Wall surveyor can determine disputes within the powers given by the Act, but section 7(4) expressly withholds the right to place special foundations on adjoining land without written consent.
That issue should therefore be identified early, before a foundation design is treated as fixed or incorporated into a wider Party Wall strategy.
Practical questions
- Is the foundation a 'special foundation' under the Act?
- Does any part extend onto or beneath adjoining land?
- Has written consent been obtained?
- Can the design be altered if consent is not available?
Our special foundations review process
The review separates the statutory definition, land relationship and written-consent issue from the rest of the Party Wall process.
Review design
Foundation and reinforcement details are examined.
Check boundary relationship
The location of the proposed foundation relative to adjoining land is considered.
Identify consent issue
We assess whether section 7(4) written consent is required.
Coordinate Party Wall route
Related section 1, 2 or 6 notices and surveyor matters are kept distinct but coordinated.
Record outcome
The design or consent position can then be reflected appropriately in the Party Wall documentation.
Special foundations review fees
Special-foundation reviews are quoted individually because the scope depends on the foundation design, boundary relationship and interaction with other Party Wall notices or disputes.
We confirm the scope and fee before instruction.
Why appoint Hourican Associates?
The written-consent restriction is easy to miss if the foundation design is reviewed only as a general engineering matter.
Hourican Associates is a Chartered Building Consultancy specialising in Party Wall surveying across London. The firm is regulated by RICS. Richard Hourican's supplied qualifications and memberships are MFPWS, BSc (Hons), MCIOB, MCABE and AssocRICS. His Pyramus & Thisbe Society membership is company-supplied, pending a current membership record.
We review special-foundation issues on basement, underpinning and piling projects throughout Greater London.
Related services & guidance
Special Foundations FAQs
These answers cover practical points not already explained above.
The statutory definition depends on the actual foundation construction. Reinforcement can be relevant, but the drawings need to be reviewed rather than assuming every engineered foundation is caught.
No. Section 7(4) expressly requires the Adjoining Owner's previous written consent.
The Act requires previous consent in writing where special foundations are to be placed on adjoining land.
The Building Owner may need to revise the foundation design so that the special foundation is not placed on adjoining land.
Yes. The special-foundation consent issue can exist alongside section 6 excavation or other Party Wall notice requirements.
Ideally yes. Identifying the issue early helps avoid a notice and Award strategy that relies on a foundation arrangement for which separate consent is unavailable.
Have your foundation design reviewed early
Send us the foundation, reinforcement and boundary information. We can identify whether the special-foundation consent restriction needs to be addressed.
Request special foundations review
Call 020 8849 8390 if you would prefer to discuss the matter first.