At Brookbanks, we understand that large‑scale new settlements only succeed when commercial thinking, engineering insight and planning strategy are fully aligned from the outset. On sites such as Bourn Airfield, the scale with challenging ground conditions, major infrastructure requirements, extensive SuDS networks and long‑term planning pathways, every technical decision has a financial, phasing and delivery implication. This article explores how our one integrated Brookbanks team managed those interdependencies across this large multi‑phase development, and how our cost & commercial specialists in particular helped maintain certainty on such a complex project.
Bourn Airfield is a nationally significant, multi‑phase residential development that will accommodate around 3,500 homes alongside education, leisure and green infrastructure. As a former military airfield, the site presents large-scale engineering demands, complex environmental considerations and a planning framework involving multiple approvals and condition discharges over many years.
While our development management experts, engineers, planners and environmental specialists provide the technical backbone of the scheme, the project also benefits from strong cost & commercial involvement. This commercial guidance ensures every design decision, planning submission, engineering solution and phasing milestone is fully aligned with financial viability and programme certainty.
Our cost & commercial specialists have a decisive role at Bourn Airfield. On a scheme of this scale, commercial thinking must play a key role in guiding the project from the earliest concept stages through to procurement and on site delivery. Our commercial specialists began by developing robust site-wide cost plans covering infrastructure, abnormal works, utilities, drainage, SuDS, earthworks, and enabling activities. These cost models are dynamic tools, continually refined to reflect emerging design detail, changing phasing scenarios, market conditions and planning outcomes. By capturing the scheme’s true financial footprint early, we enabled the client to set realistic budgets, negotiate confidently, and sequence procurement intelligently.
Our development management and cost & commercial specialists also worked hand-in-hand to coordinate outputs, confirm design readiness and maintain programme structure. This included managing planning and technical submissions, CDM responsibilities, risk assessments, document control, contractor engagement and enabling works advice. By integrating programme and commercial oversight, we maintained delivery momentum and supported the client through key decision milestones.
On a former airfield, ground profiles, material movements and load bearing requirements significantly influenced cost exposure. Working in conjunction with their engineering colleagues, our commercial specialists quantified cut-and-fill balances, evaluated export risks, and shaped engineering solutions that reduced unnecessary costs while maintaining technical robustness. The development’s drainage and SuDS strategies also required careful commercial oversight. They reviewed design options for basins, pipework, conveyance routes, and attenuation volumes, examining each from engineering, regulatory, and financial perspectives. This integrated approach ensured that the final drainage strategy met policy requirements without inflating maintenance liabilities or long term adoption costs.
Another key area of commercial influence was working with our utilities experts to develop and plan from the outset. Early utility assessments and searches enabled them to forecast reinforcement, diversion, and connection costs before statutory engagements were formalised. This avoided common pitfalls in which utility budgets escalate late in design and helped secure realistic lead times aligned with the whole programme. Crucially, the development contained fixed milestones linked to land receipts. These dates carry substantial commercial importance. Our team managed cashflow forecasting, aligning expenditure to programme triggers and ensuring the sequence of works, from enabling packages to major infrastructure, supported the financial structure of the scheme. By connecting programme and cost at such an early stage, we built resilience into the delivery plan and reduced the likelihood of costly delays.
Throughout design and procurement, they provided contract administration, budget management, and negotiation support, ensuring that agreements, scopes, and commercial responsibilities were clearly defined. This vigilance helped mitigate the risk of claims, reduced ambiguity in procurement and gave the client improved cost predictability during each phase. Our commercial specialists also conducted opportunity reviews and risk assessments, identifying areas where the project could deliver savings or unlock additional value. These opportunities ranged from revisiting engineering specifications to restructuring phasing, improving logistics, and sequencing works differently. Each review combined technical insight with financial understanding, resulting in measured, credible opportunities grounded in practical delivery.
Collectively, these activities demonstrate the central role of our cost & commercial specialists on large multi-phase projects such as Bourn Airfield. By placing commercial guidance alongside development management, engineering, planning and environmental inputs, we ensured that the development progressed with clarity, financial discipline and long term value at its core.
The elevated value we brought to Bourn Airfield lies in the depth, rigour and integration of our broad range of specialists, who provided a seamless, integrated service all under one roof. By creating a project-wide financial framework, embedding cost insight into every design and planning activity, and coordinating budgets with the programme structure, we helped the client maintain certainty on a large, complex, multi-phase development. We identified efficiencies, proactively managed risks, and ensured that strategic decisions, both technical and procedural, contributed to a coherent, viable, and deliverable whole.
If you’d like to discuss how our specialist guidance can support your development or strategic land project, our team would be happy to help.
Read more about our work on Bourn Airfield in our case study.
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