Gateway 2 and residential delivery

The introduction of Gateway 2 under the Building Safety Act has created a step change in how residential developments are brought forward in the UK. For clients and developers, it represents more than an additional approval stage - it fundamentally alters the balance of risk, programme certainty and design responsibility. Market commentary from Savills indicates that programme certainty is now a primary concern for lenders, alongside cost inflation.

In this new environment, schemes must be demonstrably compliant, fully coordinated and technically resolved before construction begins. The implications are clear: the later decisions are made, the greater their impact on cost, programme and overall viability.  According to the Royal Institution of Chartered Surveyors (RICS), late-stage design changes can cost up to 10–20 times more than those made during early design stages.

Traditionally, residential projects evolved through iteration. Design development, technical resolution and compliance checks often progressed in parallel, with issues addressed as they arose.

Gateway 2 disrupts this model.

Approval is now contingent on a level of design maturity that removes much of this flexibility. Incomplete or poorly coordinated information can result in delays to approval, with direct consequences for funding, sales programmes and delivery commitments. 

Industry feedback collated by the Home Builders Federation (HBF) and developer forums indicates that Gateway 2 approvals often take significantly longer than the statutory 12-week target, with typical processing times ranging between 16 and 24 weeks, and in some cases extending beyond this. In addition, industry estimates shared across UK development and fire engineering forums suggest that only 25–40% of Gateway 2 applications are approved on first submission.

For developers, this introduces a new risk profile - one that is less about construction uncertainty and more about pre-construction coordination.

One of the most common causes of delay at Gateway 2 is not non-compliance itself, but inconsistency.

Where fire strategy, structural design, façade systems and sustainability requirements are developed in isolation, gaps and conflicts inevitably emerge. According to Autodesk + FMI industry research, 63% of UK construction professionals cite poor data and miscommunication as primary sources of project risk.

These gaps and conflicts often surface late in the process, when they are most costly to resolve. Global construction data shows that rework can account for up to 5–10% of total project costs.

The impact of this is tangible, often resulting in design revisions at an advanced stage, increased consultant and coordination costs, programme delays and extended holding costs, and reduced confidence from stakeholders and investors. Before Gateway 2, investment was typically released at planning approval; now, there is a growing risk that funding is deferred until Gateway 2 approval is secured. 
In a market where margins are already under pressure, this level of inefficiency is increasingly unsustainable. 

Throughout 2024 and 2025, Design Delivery Unit acted as Lead Consultant, coordinating a multidisciplinary team including WSP (Structural & Civil), Ramboll (MEPH), Wintech (Façade), Reef (Access), BB7 (Fire), Sol Acoustics (Acoustic), GIllespies (Landscape) and Safety Design Unit as Building Regulations Principal Designer, to deliver RIBA Stage 4 design for the Foster and Partners–led scheme.

This integrated approach enabled the alignment of compliance, design and technical inputs from the outset, culminating in two robust Gateway 2 submissions on behalf of Berkeley (St William) for 372 new homes.

Developments of this nature must balance a number of critical and interdependent factors:

• High-quality architectural design aligned with premium market expectations
• Efficient layouts that protect net-to-gross ratios and sales values
• Robust fire and life safety strategies
• Ambitious sustainability targets
• Tight control of construction cost and programme

These are not separate considerations. Decisions in one area have direct consequences for the others. For example, core design and escape strategies influence both compliance and saleable area. Façade choices must meet fire performance requirements while also addressing cost and embodied carbon. Meanwhile, material and system selection affects buildability, programme and long-term value.

Without early integration, these dependencies can lead to redesign, value erosion and programme risk - particularly at Gateway 2. Where integrated compliance reviews are embedded from the outset, teams are able to align these factors early - resulting in more efficient design development, clearer submissions and reduced approval risk.

An integrated approach to compliance is not simply about meeting regulatory requirements - it is a mechanism for protecting value.

By coordinating fire, structural, architectural and sustainability inputs from the early stages of design, projects benefit from:

• Greater programme certainty, reducing the risk of Gateway 2 delays
• Improved cost control, by avoiding late-stage redesign and reactive value engineering
• Stronger, more defensible submissions, increasing confidence in approval outcomes
• Better alignment between design intent and commercial objectives

This approach also supports clearer decision-making, enabling clients to understand trade-offs early and proceed with confidence.

To respond effectively to Gateway 2, clients and developers should consider a shift in how projects are structured and resourced:

• Invest earlier in design coordination and technical input
  Early-stage rigour reduces downstream risk and cost
• Prioritise multidisciplinary collaboration
  Align key consultants around shared compliance objectives from the outset
• Build compliance reviews into the programme
  Treat them as critical milestones, not secondary checks
• Focus on information quality, not just output volume
  Coordinated, consistent information is key to successful approval

Gateway 2 has introduced a more demanding approval process - but also a clearer framework for delivering better residential buildings.

For clients and developers, the key to navigating this landscape lies in integration. Projects that embed compliance into the heart of design and decision-making are better positioned to manage risk, protect value and maintain programme certainty.

In a market defined by complexity and constraint, integrated compliance is no longer just best practice - it is a commercial necessity.