At One Four Six Group, our pre-construction services combine strategic insight with real-world delivery expertise. We support clients with early briefing, feasibility, programming, planning, risk management and early design.
Acting under a Pre-Construction Services Agreement (PCSA), or through a formal advisory appointment, we work alongside clients, their representatives, and stakeholders to align deliverables, establish clarity, and define a structured path toward on-site delivery.
Our approach is simple: we remove uncertainty and set projects up for success.
We help shape project briefs and assess feasibility by aligning scope, assessing constraints, and incorporating client objectives early.
We outline and develop delivery timelines, logistics, and construction phasing, building in realism from day one.
We identify key risks early and support mitigation across design, statutory approvals, and delivery logistics.
We interrogate design, whilst concurrently offering insight into sequencing, coordination, and site practicalities.
We lead and coordinate design with the same precision we bring to construction. Our approach ensures that design intent, cost, and buildability stay aligned — protecting quality, controlling risk, and promoting our client’s interests from conception to completion.
We test and develop cost plans, review key assumptions, and suggest value opportunities that retain design intent.
Where appropriate, we support early-stage contractor-led design for early works and specialist packages.
At One Four Six Group, we deliver Design & Build projects with precision, clarity, and control.
This model is particularly suited to clients who want clear accountability, risk management, cost control, and a collaborative contractor from the outset. We often take forward schemes we’ve supported during the pre-construction phase, maintaining continuity and protecting intent while converting ideas into deliverable packages.
Sometimes referred to as turnkey delivery, this route gives clients a streamlined path from concept to completion — with a single point of contact and clear contractual accountability throughout.
We take on design and construction, giving clients one contract, one team, and one clear line of accountability.
Where we've supported the early stages, we carry forward knowledge, relationships, and design intent, reducing handover risk.
We lead coordination across consultants, specialists and subcontractors, ensuring design aligns with programme, cost, and site conditions.
We develop robust construction proposals from informed cost plans and manage change carefully to protect our client’s budget.
We take full responsibility for planning, managing and delivering project programme — identifying an efficient critical path, sequencing key activities, and making informed adjustments to maintain momentum and meet deadlines.
We work with expert designers and consultants to develop coordinated solutions that are practical, safe, and efficient to build.
We carry out formal quality checks at defined stages, tied to programme, specification, and key hold points. Our internal QMS sets the standard, and we hold our supply chain to it.
We lead a proactive safety culture, taking responsibility for compliance, protecting both operatives and building users, and meeting all statutory and CDM obligations without compromise.
We package and tender works to approved supply chain partners, balancing competitiveness with quality and reliability.
At One Four Six Group, we deliver traditional construction contracts with clarity, structure, and control. This route is typically led by the client and their design team, with our role focused on pricing, programming, and executing the works under a lump sum contract.
While many projects are competitively tendered, we also work under negotiated appointments, often following early-stage involvement or repeat collaboration. We provide contractor design portions (CDPs) where required, supporting specialist design development while maintaining a clear separation of responsibilities.
This is disciplined delivery, with defined roles and strong site leadership.
We price competitively for tendered schemes and also take on negotiated contracts where we’ve supported pre-construction or have an existing relationship.
We build a realistic programme from the outset and labour, sequencing, and supply chain to maintain progress and hit key dates.
We take an active role in working with the lead consultant to resolve queries early, coordinate information flow, and protect design integrity during delivery.
Where design responsibility sits with us, we coordinate specialist input, develop technical solutions, and ensure compliance with the employer’s requirements.
We manage change with care and control — assessing impact, advising promptly, and maintaining clarity on cost and programme.
We lead a proactive safety culture, taking responsibility for compliance, protecting both operatives and building users, and meeting all statutory and CDM obligations without compromise.
We carry out formal quality checks at defined stages, tied to programme, specification, and key hold points. Our internal QMS sets the standard, and we hold our supply chain to it.
We interpret and deliver the design with care, flagging gaps or inconsistencies early and holding our teams to high standards of execution.
Construction Management gives the client direct control over trade contracts, with One Four Six Group appointed to manage the construction phase.
This route suits clients who want visibility and flexibility, particularly where early site access, fast-moving packages, or complex procurement are key. It allows enabling works and trade appointments to progress ahead of full design, with our team managing sequencing, coordination, and delivery throughout.
Our role is delivery leadership. We protect your programme, your standards, and your interests on site.
We plan and coordinate the works across multiple trade packages, maintaining momentum and resolving conflicts as the project progresses.
We manage the relationships, sequencing, and overlap between trades — ensuring accountability and avoiding gaps in scope or responsibility.
We support the client team in packaging, scoping, and appointing trade contractors — balancing flexibility with control.
We control access, manage temporary works, and oversee day-to-day logistics to keep the site moving safely and efficiently.
We lead on site safety and compliance, implementing systems that meet statutory duties and support safe working across all trades.
We track costs, flag risk items early, and support the client in managing variations across multiple direct contracts.
Where packages carry design elements, we coordinate information flow to ensure compatibility and timely release to site.
We provide structured updates, maintain open communication, and ensure the client retains full visibility of progress, issues, and decisions.
Work Flow
Stage 1
Stage 2
Stage 3
Stage 4
Stage 5
Early input, PCSA, risk, planning
Early input, PCSA, risk, planning
Early input, PCSA, risk, planning
Route to procurement and delivery under single contract
Phased trade procurement and Site coordination
Route to procurement and delivery under single contract
Tendered or Negotiated build role under full design
Phased trade procurement and Site coordination
Route to procurement and delivery under single contract
Tendered or Negotiated build role under full design
Phased trade procurement and Site coordination
