What genuinely qualifies on site and in design
HMRC publishes no construction-specific R&D guidance page; the sector’s worked examples sit in the general GfC3 guidance (Part 4), which this section follows.
HMRC’s worked examples give the sector its two clean patterns. First, the novel-structure pattern. The cantilevered-structure example qualifies the planning and development of the novel structure, and the extra work to overcome non-trivial uncertainties during construction. Second, the improved-method pattern. The ground-survey example rejects a difficult survey done with known techniques, because no advance was sought. It qualifies developing an appreciably improved method of survey.
Between them sits most of the sector’s real R&D. That means geotechnical and structural problems beyond published practice, materials behaviour at unusual scales or conditions, methods developed because established ones demonstrably failed, and digital-engineering work that crosses into the software tests. The constant is the guidelines’ bar: an advance in the field’s capability, not a first for your firm, through uncertainty a competent professional could not readily resolve.
The entitlement question the sector cannot skip
Construction runs on contracting chains, and since 2024 the claim generally belongs to the party that decided to undertake or initiate the R&D, read from the contract terms and surrounding circumstances. The practical splits:
- Employer-specified innovation. Where the contract contemplates development work, the claim tends to sit with the employer, not the contractor delivering it.
- Contractor means-and-methods R&D. Where the contractor initiated qualifying work on how to build what the contract merely requires built, the claim is the contractor’s, on the right facts.
- Design consultancies developing genuinely new engineering approaches within their appointments. Fact-specific, and exactly the territory the contracts should now address expressly.
Two parties claiming the same uncertainty is an enquiry for both. The rule’s mechanics are on subcontractors and agency workers. If your standard forms have not been reviewed since the merged scheme, reviewing them is the single most valuable hour this page can prompt.
Where construction claims go wrong
- “Bespoke” as a synonym for R&D. Unique jobs, standard knowledge: the survey example answers it.
- Weather, ground and logistics difficulty claimed as uncertainty. Hard conditions are not technological uncertainty unless resolving them defeated competent professional knowledge.
- Value engineering and compliance work. Cost-driven redesign and meeting building regulations with known approaches are commercial and routine respectively.
- Nothing written down. Site R&D happens fast and undocumented; a claim reconstructed from memory a year later meets the records bar badly. The fix is cultural and cheap: the site diary and the test data are the evidence, if they are kept.
Frequently asked questions
Every project we do is bespoke. Does bespoke mean R&D?
No. Bespoke means the job is unique; the test is whether the field's knowledge was insufficient. HMRC's survey example is exact: difficult ground conditions handled with known techniques were not R&D, while developing an appreciably improved survey method was. Unique sites solved with established engineering are skilled delivery.
We solved a problem on site nobody had met before. Claimable?
Possibly, and HMRC's cantilevered-structure example qualifies exactly that shape: planning and developing a novel structure plus the work to overcome non-trivial uncertainties during construction. What decides it is whether a competent professional could readily have resolved it, and whether anything was recorded at the time.
We work under main contracts. Is any claim ours?
This is the sector's biggest question since 2024. The claim generally belongs to whoever decided to undertake the R&D, judged from contracts and circumstances. A subcontractor solving its own means-and-methods problem may claim; R&D contemplated by the employer's contract generally belongs upstream. Contract wording now moves claims.
Do materials in failed works qualify?
Consumables transformed in genuine R&D trials can qualify, but anything incorporated into the works you hand over is on the wrong side of the sold-or-transferred rule. Mock-ups and test panels that stay yours are the claimable shape.