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What Is a Parent Company Guarantee in a London Construction Contract?

A parent company guarantee (PCG) is a written agreement where a contractor's parent company guarantees performance of the contract — protecting the client if the contractor subsidiary becomes insolvent. Common on contracts over £500,000 in London; rare on smaller domestic contracts. Provides recourse to parent company for completion or remediation costs.

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01

When PCG is needed

Larger residential contracts (>£500k): contractor often operates through limited-liability subsidiary specifically for project; if subsidiary insolvent, client has no recourse to parent (without PCG). Common London scenarios: high-end mansion renovation £1M+, listed building works £750k+, multi-unit refurbishment £2M+. Smaller contracts (<£200k): PCG rarely available — contractor usually small business without separate parent; rely on PII, structural warranty, personal guarantees from director. Mid-range £200–500k: PCG sometimes available from contractors with corporate structure; check at tender stage.

02

What PCG covers

Typically: completion of works (parent steps in if subsidiary fails); remediation of defects (parent liable post-completion); financial losses (additional costs to complete with alternative contractor); delay damages. Limits: usually capped at original contract sum + 10–15%; some PCGs limited to specific risks (completion only, not defects). Solicitor review pre-execution; check what triggers parent liability (subsidiary insolvency? default? failure to remedy?).

03

Alternatives — personal guarantee, bond, escrow

Personal guarantee from contractor director: small contractors typically give personal guarantee — director personally liable. Risk: director's personal wealth often insufficient for material defects. Performance bond from insurer: client requires bond from bonding insurer; pays 10–15% of contract value if contractor defaults. Cost: contractor pays 0.5–2% annually — passed to client. Escrow: 5–10% of progress payments held in escrow until completion; client retains if contractor defaults. Less common residential due to administration.

04

Practical use in residential

Most London residential contracts (<£300k) don't have PCG — risk managed via: (1) clear contract with JCT or FMB terms, (2) regular progress payments (no over-advancement), (3) retention (5%), (4) PII and structural warranty, (5) personal guarantee from director on smaller jobs, (6) reputable builder with longevity. PCG considered for: high-net-worth projects £500k+, complex structural/heritage risk, clients with limited tolerance for contractor failure.

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Does my domestic builder have a parent company?

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Most small London residential builders are limited companies without corporate parents (sole director). PCG not available; rely on director's personal guarantee, PII, structural warranty. Large national contractors (Mace, Morgan Sindall residential) have parent structures and PCG available — but rarely used on small domestic projects.

PCG vs warranty?

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PCG: contractual; parent guarantees performance; covers completion + defects during construction. Warranty (LABC, NHBC, Premier): insurance policy; 10-year structural defect cover; first-party claim by owner. Different protections; both useful for high-value projects.

Should I demand PCG for £300k extension?

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Probably not. PCG rare at this scale; demanding may deter quality contractors. Better: insist on FMB Domestic Building Contract or JCT Minor Works with retention (5%), regular interim payments, PII evidence, 10-year structural warranty. Personal guarantee from director for comfort.

How is PCG enforced?

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Client makes formal claim against parent under PCG terms. Parent either steps in to complete directly, appoints alternative contractor, or pays client cost of completion. Disputes go to court. Parent companies sometimes contest claim — may take 1–3 years to resolve; client may need bridging during dispute.

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