A structural warranty should be planned as part of the development programme rather than treated as a completion-stage requirement. The timing of provider engagement and technical review can affect construction sequencing, development finance and the ability to issue policy documentation at practical completion.
A 10 or 12-year structural warranty can provide long-term protection against major structural defects affecting stability, load-bearing elements and overall building integrity, subject to policy terms. The warranty term runs from practical completion, not from planning consent or the start of work on site. Warranty arrangements are underpinned by technical oversight and inspection during construction, although the scope and depth of that process can vary by provider and scheme.
The key principle: engage before work starts on site
The best time to engage a structural warranty broker is before construction starts, not after. Early engagement provides time to assess the market, identify a provider that suits the scheme and understand the technical requirements that will apply during the works.
Development finance lenders commonly require evidence of approved warranty arrangements before the first drawdown, although the timing and form of this requirement will depend on the facility terms. A warranty strategy should therefore be considered alongside funding negotiations, procurement planning and the construction programme.
Where a provider is approached after material work has started, it may require additional information, retrospective assessment or evidence of completed stages. This can reduce the available options and introduce avoidable pressure before completion.
Pre-planning and concept stage
Engaging LBB at concept stage can help establish the likely warranty requirements before the project team has committed to a provider or construction route. This is particularly relevant for schemes involving complex foundations, conversions, retained structures, phased delivery or mixed uses.
At this stage, LBB can help clarify the information likely to be needed for market engagement. This may include the development type, anticipated construction value, proposed tenure, funding route and design approach. Early discussion can also help identify likely lender considerations where homes are intended for mortgage sales.
A provider does not need to be appointed before planning consent is secured in every case. However, considering the warranty strategy early can help avoid a gap between planning approval, finance documentation and the intended start on site date.
Planning and design stage
Once the scheme is progressing, the proposed warranty provider may require information for technical review. The depth of that review will vary between providers and according to the project. It may include:
- Architectural drawings
- Structural information
- Site investigation reports
- Specifications
- Professional appointments
- Details of the procurement route
The provider will assess the proposed development against its technical requirements. Queries or conditions may need to be addressed before the scheme is accepted and before an inspection programme can be confirmed. This should be coordinated with the project team so that warranty requirements are reflected in design management and construction planning.
The technical review is not a substitute for design responsibility, statutory approvals or the developer’s own quality assurance arrangements. It is part of the warranty process and should be managed alongside the wider project documentation.
For a fuller explanation of this process, read how structural warranties work.
On-site inspection stages
Once construction begins, warranty providers will typically carry out technical inspections at key stages. The exact inspection schedule will vary by provider, project type and construction method, but it may include stages associated with foundations, superstructure, weatherproofing and pre-completion works.
The inspection programme needs to be coordinated with the build programme. The contractor and site team should understand when the provider needs to be notified and which elements should remain visible for inspection. If works progress before an expected inspection can take place, the provider may need further evidence or may require additional review.
Missing an inspection stage can delay policy issue at completion and may affect the provider’s willingness to confirm cover for the relevant works. It should not be assumed that a missed stage can be resolved through photographs or later site visits. The provider will determine what evidence or additional assessment is required.
For phased schemes, inspection and completion arrangements may need to be considered separately for each phase or block. Early coordination is particularly important where handovers, sales completions or funding milestones are staggered.
Practical completion and policy issue
Practical completion is a key point in the structural warranty timeline. The provider will need to be satisfied that its technical requirements have been addressed and that the relevant inspection process has been completed before policy documentation can be issued.
The policy term usually starts from practical completion. It does not start when planning consent is granted, when the warranty provider is first appointed or when construction begins. Developers should therefore ensure that completion documentation is planned alongside the programme for handover, sales completions and funder requirements.
The final process can vary between providers. Outstanding technical observations, incomplete records or changes to the scheme may need to be resolved before documentation can be finalised. Visit LBB’s structural warranties page for more on how warranty arrangements can support major residential, Build to Rent and mixed-use developments.
The developer period: years one to two
Many structural warranty arrangements distinguish between an initial developer responsibility period and the later structural insurance period. During the first two years after practical completion, the developer or builder will commonly remain responsible for addressing defects under the relevant contractual and warranty arrangements.
The precise obligations will depend on the policy, sale documentation and building contract. Developers should not assume that every defect is covered by the structural warranty during this period. Clear records of handover, defect management and completion information remain important.
This period reinforces the need for warranty arrangements to align with the developer’s quality controls and contractual responsibilities from the outset.
The structural period: years two to 10 or 12
After the initial developer period, the structural warranty may provide protection against relevant major structural defects for the remainder of the policy term, subject to the terms, limits and exclusions of the policy.
The policy does not guarantee that every defect will be covered. It is intended to address defined structural risks affecting matters such as stability, load-bearing elements and overall building integrity. The policy wording remains the authoritative source for the scope of protection and notification requirements.
For long-term owners, including housing associations, Build to Rent operators and investors, this period can form an important part of the wider asset risk strategy. For wider context on cover scope and provider considerations, see our structural warranty guide.
Retrospective situations
It may be possible to seek warranty cover after construction has started or after works have been completed. However, retrospective arrangements are not available for every scheme and can require detailed technical assessment, intrusive investigations or extensive construction records.
A provider considering retrospective cover has not observed the project through its standard inspection process. It may therefore need additional evidence before deciding whether it can offer terms. This can add cost, extend the process and affect completion or sales planning.
Developers should not rely on retrospective cover as a fallback position. The strongest approach is to arrange the appropriate warranty before work starts and manage inspections throughout the build.
Managing the timeline with LBB
LBB supports developers from the planning stage through provider selection, market engagement and coordination of the warranty process. A structured approach can help align the warranty with development finance requirements, the construction programme and the intended sales or ownership strategy.
Talk to LBB at the planning stage for independent advice on warranty options and inspection management.
