
Running a building project is never easy. In fact on many projects – builders, site managers, foreman, construction directors and draughtsman are involved in solving problems for their clients. And solving problems for their clients could mean that their company qualifies for R&D tax credits for construction. The proof is often in the pudding – 8% of R&D claims last year were in the construction industry – with an average claim of about £54,000.
There are currently thousands of construction companies across the country working on projects using cutting-edge techniques or developing advances to existing techniques. Although the majority of these could be financially benefiting from valuable R&D Tax Relief, many are unaware that the projects they are undertaking qualify for this support.
What qualifies as R&D in Construction
To qualify for R&D tax relief – you need to be operating from a limited company. You also need to have performed work that has led to a technical advance in your field. I’ll save you from the technical jargon and give you some examples of work that could qualify:
And those are just some examples. We regularly work with construction companies, helping them claim for all kinds of projects.
Case Study – Celtic Construction Company
This client didn’t think their work would qualify for R&D tax relief, and didn’t want to waste any time trying to make a speculative claim. However, after a short meeting with one of our expert R&D tax consultants, we pin-pointed 2 projects that qualified for tax relief.
The first was the development of a bespoke soakaway drainage system, to allow water to soakaway and be held under the strip foundations of a building on a waterlogged site with limited space for a full soakaway.
The second project required adjustments and improvements to a buildings structure to allow it to be erected on shaley ground with a significant slope. Both of these projects were successful and took place over the last 3 years – and thanks to their consultation with Zest – the Celtic Construction Company were able to quickly access £40,000 of tax repayments and reductions.
Could Your Construction Business Qualify for R&D Tax Credits?
Find out if your business could qualify for R&D tax relief, with a 15 minute, no obligation consultation. We’ll talk about what work you’ve done and how much you could claim. Then you can decide how you want to proceed.

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The Chancellor will deliver the Autumn Budget 2026 on Wednesday 28 October. For any UK company running an R&D tax relief claim — or planning its first — it is worth knowing what is genuinely on the table before the red box opens, and what is simply noise. The short version: after three years of near-constant reform, the R&D regime is finally settling. Most of what matters for your next claim is already law. But a Budget always carries the risk of a technical tweak, and there are a few signals worth tracking. Where the R&D rules stand going into the Budget The big structural change is done. The merged RDEC scheme is now the default for accounting periods beginning on or after 1 April 2024, replacing the old separate SME and RDEC regimes. It gives a taxable expenditure credit of 20% of qualifying R&D costs — worth roughly 15% net once Corporation Tax at 25% is applied. Loss-making, R&D-intensive SMEs are the exception. If your qualifying R&D is at least 30% of total expenditure, you may instead claim under Enhanced R&D Intensive Support (ERIS), which offers a more generous deduction and a payable credit for surrenderable losses. None of […]