Survey finding
Unity or Boot construction: survey, mortgage and what to do
Unity and Boot PRC houses follow the standard PRC pattern: certificate-or-no-certificate is the binary marker. This page sets out what to ask and how lenders treat the construction.
Last updated: 6 May 2026. Editorially reviewed: 20 May 2026.
Finding
Unity or Boot construction
What this usually means
Unity (also known as Unity Construction) and Boot Pier and Panel are precast reinforced concrete (PRC) systems built between 1948 and the early 1960s. Both designated defective under the Housing Defects Act 1984. Like other PRC systems, the embedded steel reinforcement corrodes; licensed repair under a PRC Homes Ltd or equivalent scheme is the standard remediation.
Why it matters
Same pattern as PRC and Airey: unrepaired Unity/Boot is not generally high-street mortgageable. Repaired and certificated, mainstream lender appetite returns. The certificate is the document that matters.
Ask your surveyor
- Check:Can you confirm this is Unity or Boot construction?
- Check:Is there a valid PRC repair certificate?
Ask the seller
- Check:Do you have the PRC repair certificate and structural warranty paperwork?
- Check:When was the repair completed?
Next steps
- •Confirm with your broker which lender will accept this construction type before paying for any further surveys.
- •Order a structural engineer's report if no recent one exists in the property's records.
Tool shortcut
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What you need to know
Severity
Serious. Lender and insurer involvement likely; structural or specialist remediation.
Typical cost to fix
Licensed Unity/Boot repair: typically £35,000–£80,000 per property. Specialist structural engineer's report £600–£1,500.
Mortgage impact
High-street lenders generally decline unrepaired Unity/Boot. Repaired and certified, mainstream lenders treat as standard.
Insurance impact
Standard on certified-repaired Unity/Boot; specialist on unrepaired.
When to pull out
Pull out if unrepaired, no certificate exists. The seller refuses to fund repair, and your lender refuses.
When to renegotiate, and by how much
If certificated, treat as standard. If unrepaired, negotiate by full repair cost plus 15%.
Thinking of pulling out or renegotiating? What to do after a bad survey
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Flood, subsidence, EPC, crime, schools, transport, broadband, tenure, age, listed status and price checks where data is available.
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PRC (precast reinforced concrete) house , often sits near unity or boot construction on a survey and is the next thing to check.
How MyPropertyScan produces this guide, and what it is not
Published by MyPropertyScan and written by Ziad Nasr, who is accountable for its accuracy. No page here is written or reviewed by a chartered surveyor, conveyancer or regulated adviser, and we do not claim otherwise.
This page is not:
- Chartered surveying — we do not inspect properties or produce RICS Home Survey reports
- Legal advice — we do not act as conveyancers or advise on title, tenure or contracts
- Mortgage or insurance advice — we are not regulated by the FCA and give no recommendations
Figures and process steps come from the published UK datasets and standards listed on this page, not from professional practice. Pages are updated when source coverage, survey cost assumptions, or lender and legal requirements materially change. Dataset limitations are set out on the methodology page.
Spotted something out of date or wrong? Email hello@mypropertyscan.com and we will correct it and change the update date.
Sources used
We use UK public and specialist sources where they are available. Public datasets can be incomplete, delayed, or missing for some addresses. Treat them as a starting point, not as a replacement for professional advice.
Source standard: preference goes to official government datasets, statutory bodies, professional standards, and primary dataset publishers. We cite the source family on the page and explain coverage limits rather than filling gaps with unsupported estimates.
- Professional standard: RICS Home Survey StandardRICS standard for condition-based residential surveys in the UK.
- Learn more from: RICS consumer guide to surveysConsumer-facing guide to survey types and when each level is appropriate.
- Official guidance: GOV.UK buying or selling your homeGovernment overview of the home buying and selling process.