A building is insured differently at every stage of its life — and the gaps live at the transitions. A phase-by-phase guide from ground-break to handover, and the checklist for each seam.
A completed building has a simple insurance story: a property policy covers the structure, a liability policy covers the owner, renewal happens annually. A building under construction has a complicated one — the asset changes value every week, multiple parties work on it at once, and responsibility for insuring it changes hands at least twice before the first resident gets a key. Most construction insurance failures are not bad policies. They are gaps at the seams between phases, where each party assumed another was covered.
This guide walks the phases in order and gives the checklist for each seam. The organising rule: at every date in a building's life, someone must be able to answer two questions — who owns the risk today, and which policy responds today. If either answer is unclear, that date is a gap.
Phase 1 — Construction: contractors all risks
From ground-break to practical completion, the standard instrument is a contractors all risks policy (CAR — internationally often called builders' risk). It typically covers physical loss or damage to the works themselves — the part-built structure, materials on site, sometimes materials in transit — plus third-party liability arising from the site. The sum insured tracks the full contract value, because a fire at 90 percent completion destroys 90 percent of a building.
Checklist for this phase:
- Who buys it — principal or contractor? Both models are common. What matters is that the contract names one party responsible and the policy names all parties (owner, main contractor, subcontractors) as insureds. Two half-overlapping policies are worse than one joint one.
- Does the sum insured escalate? A policy fixed at the original contract value quietly underinsures every variation order. Check for escalation provisions or endorse as the contract grows.
- Subcontractor plant and equipment. The tower crane is usually not "the works." Whose policy carries it should be written down, not assumed.
- Extensions that earn their premium: removal of debris (a collapsed structure costs money before rebuilding even starts) and, for revenue-generating projects, delay-in-start-up cover tied to the physical damage.
Phase 2 — The maintenance and defects liability period
Practical completion does not end the contractor's exposure. Construction contracts standardly include a defects liability period — often twelve months — during which the contractor returns to fix defects. CAR policies mirror this with a maintenance extension covering damage the contractor causes while remedying defects, and, in wider forms, damage arising from causes originating during construction.
This is the least glamorous phase and the most commonly misunderstood seam. The building is occupied and the owner's property policy is on risk for new perils — but a latent construction defect that emerges in month eight sits in a contested zone between the property insurer, the CAR maintenance extension, and the contractor's own liability. The checklist here is short and contractual: confirm the maintenance extension exists and its exact form, and keep the completion certificate and handover snagging list — they are the documents every later argument cites.
Phase 3 — Handover: the seam that matters most
At practical completion, risk in the works passes — usually to the owner or developer — and the CAR policy begins winding down. The owner's permanent property policy must be on risk from that same date. Three failure modes recur:
- The un-insured week. CAR ends at completion; the property policy starts "when we got around to it." Any loss in between is uninsured. Fix: the property policy's inception date is a completion-linked contractual obligation, not an admin task.
- Phased handover. Towers and compounds complete in stages. Units handed to buyers are the buyers' (or the association's) problem; unfinished phases remain on CAR. The schedule of what transferred when needs to be maintained in writing — this is precisely where multi-party projects lose track.
- The value reset. The CAR sum insured was contract cost; the property policy needs rebuild cost including professional fees and debris removal, at today's prices. Rolling the construction number forward unexamined bakes in underinsurance from day one.
Every construction claim dispute starts with a date. The projects that avoid disputes are the ones where risk transfer dates are written, matched to policy dates, and filed.
Phase 4 — Occupied life, with a construction tail
After handover the building lives on annual property and liability cover — but the construction phase casts a tail. In many jurisdictions contractors and designers carry long-duration liability for structural failure (decennial-style liability in civil-law markets, including contractor liability regimes in the Gulf), and latent-defect claims can surface years later. For the owner the practical takeaways are archival: keep the CAR policy, completion certificates, and as-built documentation for the long haul, because a structural issue in year six will send everyone hunting for exactly those papers.
Why this belongs in an embedded conversation
Every phase transition above is triggered by a transaction that already happens on a platform somewhere: contract award, variation orders, completion certification, unit handover, association formation. Each is a moment where the required cover changes and the data needed to place it is already in the workflow. Construction insurance today is bought through brokers and paperwork; the phase logic itself is mechanical enough to be embedded into the project-management and conveyancing systems where those trigger events live. The complexity is real, but it is the schedulable kind.
If you take one thing from this guide: insurance for a building is not a product, it is a relay. The baton passes at defined dates, and the race is lost at the exchanges.