Insurance, builders warranties and performance bonds: what to look out for when building a house

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Building a house is one of the largest investments most people make. Understanding insurance, builders’ warranties and performance bonds protects your investment, speeds up remedies when things go wrong, and helps avoid costly disputes. This guide explains the differences, what to check in documents, how to make a claim, and practical risk-control steps to take during construction.

Quick overview: the three pillars

  • Insurance (e.g., contract works/contractors’ all-risk, public liability, professional indemnity) protects against accidental loss, property damage and third‑party claims.
  • Builders’ warranties (statutory or contractual) are promises by the builder covering defects for set periods after practical completion.
  • Performance bonds (or bank guarantees) secure the owner if the builder fails to complete or remedy defects — they provide access to funds without protracted litigation.

Why this matters early — contract and tender stage

Before signing a contract:

  • Require certificates: proof of current insurance policies with your project specified as covered.
  • Confirm warranty terms: duration, scope, exclusions, and the process to notify the builder of defects.
  • Request a performance bond (amount usually 5–10% of contract sum) for larger projects or if the builder has limited financial history.
  • Engage independent inspections and keep records (see checklist below). For more on inspections, see What to look out for when building a house: critical inspections from slab to finish.

Key insurance types and what to check

  • Contract Works / Contractors’ All-Risk

    • Covers damage to the building during construction (fire, storm, theft).
    • Check policy period covers the entire construction and any defects correction period.
    • Confirm insured value equals contract sum plus an allowance for variations and escalation.

  • Public Liability

    • Covers third-party bodily injury or property damage on the site.
    • Ensure limits are adequate for local expectations (commonly $5M+).

  • Professional Indemnity (for designers/engineers)

    • Covers design errors leading to loss.
    • Confirm architects/engineers carry this and name you as an interested party if needed.

  • Home Warranty Insurance / Builder’s Home Warranty (where statutory)

    • In many jurisdictions, small domestic works require builder warranty insurance protecting owners if the builder dies, disappears or becomes insolvent.
    • Check how this interacts with statutory warranty obligations.

What to review on the insurance certificate:

  • Insured parties (owner should be listed as an interested party)
  • Policy number and period
  • Sum insured and sub-limits
  • Specific exclusions (e.g., defective workmanship vs resulting damage)
  • Claims reporting process and contact details

Builders’ warranties — types, scope and traps

Builders’ warranties can be:

  • Statutory warranties mandated by law (durations vary by jurisdiction).
  • Contractual warranties agreed in the building contract.

Typical coverage windows:

  • Minor defects: 3–12 months
  • Major structural defects: 6–10 years (jurisdiction-dependent)

Common pitfalls:

  • Warranties often require prompt written notice of defects — missing notification periods can void your rights.
  • Many warranties exclude cosmetic wear or damage from owner misuse.
  • Warranties may require builder to be given the chance to rectify before you engage others.

For enforcing warranties and defect management, consult guides like Punch lists, defect documentation and acceptance: what to look out for when building a house and What to look out for when building a house: warranty types and how to enforce them.

Performance bonds — how they work and when to call them

  • A performance bond is typically issued by a bank or insurer to guarantee performance up to a fixed amount.
  • It is payable on demand or after proof of default depending on the bond wording.
  • Bonds are not insurance; they’re a security — calling a bond doesn’t determine liability, it simply provides funds for the owner to remediate or complete work.

When to request/use a bond:

  • Builder insolvency risk
  • Large projects where completion risk is material
  • When builder is inexperienced or subcontracting heavily

Be careful:

  • Bond claims can be resisted on technical grounds; ensure bond wording matches contract remedy triggers.
  • Some bonds have expiry dates — ensure they cover the defect liability period.

Table: Quick comparison — Warranty vs Bond vs Insurance

Feature Builders’ Warranty Performance Bond / Bank Guarantee Insurance (Contract Works / Liability)
Purpose Fix defects / statutory protection Financial security if builder defaults Cover physical loss/damage and third-party claims
Who pays Builder (or builder’s obligation) Bank/Guarantor on default (owner receives funds) Insurer pays valid claims
Typical claim trigger Defect or breach of statutory warranty Builder default or non-completion per contract Accidental damage, loss, liability event
Ease of access Can be contested; may require dispute resolution Often payable on demand (if bond says so) Subject to policy conditions and investigation
Limit Typically contractually defined or statutory Fixed % of contract sum Sum insured / policy limits

Practical checklist for owners (pre-construction & during works)

Steps to take if something goes wrong

  1. Notify the builder in writing immediately with photos and dates.
  2. Check your contract and warranty for notification and remediation timelines.
  3. Notify the insurer if the issue falls under an insurance policy (e.g., damage during construction).
  4. Engage an independent expert to assess defects and produce a report.
  5. If builder fails to act, consider calling the performance bond, lodging a warranty insurance claim, or initiating dispute resolution/tribunal proceedings.
  6. Keep records of communications and remediation costs — essential for claims and legal action.

For managing defects after occupancy and latent issues, see Managing latent defects and post-occupancy issues: what to look out for when building a house.

Risk reduction and best practices

Final tips

  • Read every insurance policy and warranty document — assumptions can be costly.
  • Prioritise documentation: photos, inspection reports, contracts and correspondence — they are your evidence in a claim or dispute.
  • Use independent inspections and a documented punch list to limit surprises at handover.
  • When in doubt, obtain legal advice early — timely notices and following contract procedures often determine your rights.

For detailed procedural guides on inspections, documentation, and enforcing warranty rights, explore these related resources:

Being proactive about insurance, warranties and bonds reduces risk and gives you practical remedies when problems arise. If you’re about to sign a building contract, take time now to get these protections right — it will save money, time and stress later.