Reinventing the legacy NHS estate: A portfolio-led route to safer, lower-carbon care

For many NHS organisations, legacy estate is both a risk and an opportunity. Addressed in isolation, ageing buildings can drain capital, increase operational pressure and undermine care. Addressed strategically, they can become a platform for safer services, better staff experience and credible progress toward net zero carbon.

Why legacy estate is now a strategic priority

Much of the NHS hospital and community estate was designed for very different models of care, energy demands and workforce expectations. Ageing fabric, fragmented layouts and outdated services translate into higher running costs, increased backlog maintenance and greater risk of failure.

At the same time, estates teams are navigating overlapping pressures:

• Net zero carbon requirements for new and refurbished assets
• A shift towards neighbourhood health centres and community-based care
• Workforce priorities focused on wellbeing, retention and flexibility
• Constrained capital and increasing scrutiny of value for money.

From project-by-project fixes to portfolio-led decisions

Too often, estate investment is still driven by individual failures or isolated business cases. While this can deliver short-term relief, it rarely addresses systemic issues such as:

• Poor fabric performance and heat loss across whole blocks
• Inefficient plant and distribution serving multiple departments
• Under-used or poorly configured spaces that lock in inflexible models of care

A portfolio-led approach reframes the challenge. Instead of asking ‘what project do we fix next?’, it asks where intervention will deliver the greatest combined benefit across carbon, cost, risk, safety and flexibility.

This shift relies on robust building consultancy input: condition surveys, utilisation analysis, energy modelling, lifecycle costing and risk assessment, brought together in a way that supports confident decision-making.

Using evidence to prioritise the right buildings, in the right order

Our Retrofit Toolkit was developed specifically to support this kind of estate-wide thinking. It brings together asset data, typical system performance and cost benchmarks to test multiple intervention scenarios – from light-touch improvements to deep retrofit – at building or portfolio scale.

The output allows estates and finance teams to compare options against the most appropriate criteria for them:

• Capital cost and phasing
• Operational energy reduction and revenue savings
• Embodied carbon and whole-life impact
• Payback periods and net present value
• Buildability, disruption and clinical risk.

This evidence-led approach helps organisations move away from reactive decision-making and towards clear, prioritised programmes that align with clinical strategy, funding gateways and long-term estate plans.

Effective estate optimisation typically involves:

• Baseline and segmentation - Using condition, utilisation, energy and clinical data to group assets into typologies and priority levels.
• Intervention modelling - Testing packages of fabric upgrades, plant replacement, controls, ventilation, digital monitoring and space reconfiguration.
• Strategic alignment - Overlaying clinical strategy, neighbourhood health plans, workforce priorities and local authority regeneration objectives.
• Programme design - Phasing works to manage disruption, decant, supply chain capacity and funding windows.

Because we combine building consultancy and architectural design within one practice, this process does not stop at analysis. Options tested at portfolio level are translated directly into deliverable design solutions, with a clear line of sight from data to construction.

Retrofit as a route to safer, more humane care

Estate optimisation is not only about energy or backlog maintenance. It is about creating safer, more dignified and more adaptable environments for patients and staff.

Many interventions that reduce carbon and cost also unlock wider benefits:

• Improved layouts and sightlines that support safer observation and staffing models
• Better daylight, acoustics and comfort that support staff wellbeing and patient recovery
• More flexible, standardised spaces that can adapt as services change
• Upgraded ventilation and controls that strengthen infection prevention.

Through our work on complex, live healthcare sites, we have seen how carefully planned remodelling and targeted extensions can create vibrant and uplifting spaces that not only improve the efficiency of the legacy building, but also reconnect and transform entire estates, without the need for expensive and disruptive new build solutions.

Linking estate optimisation to funding and approvals

For finance directors and estates leaders, a key challenge is translating estate ambition into credible, fundable programmes.

A portfolio-based retrofit strategy strengthens this process by:

• Creating clearer strategic and economic cases through quantified energy, carbon and lifecycle benefits
• Supporting governance and risk management through defined phasing and disruption planning
• Providing a more transparent basis for prioritisation when capital is limited.

Our teams understand funding routes, approvals processes and regulatory requirements alongside design delivery. This helps turn technical options into programmes that stand up to scrutiny and support long-term value for money.

Joining up digital, decarbonisation and estate management

Digital transformation and net zero carbon are often discussed separately, but for estates teams they should be considered as inseparable. To fully optimise estates, performance must be monitored, understood and improved over time, not simply predicted at design stage.

A retrofit-led optimisation strategy should therefore integrate:

• Sub-metering, BMS upgrades and data platforms alongside fabric and services works
• Simplified digital estate models to support future scenario testing and maintenance planning
• Clear, usable asset information for estates and FM teams

When combined with people-centred design principles, these tools support buildings that are easier to operate, easier to adapt and more resilient in use.

A lifecycle partner for an evolving NHS estate

Optimising legacy estate is not a one-off exercise. It is an ongoing process that spans strategy, feasibility, design, delivery and performance in use.

Our role is to bring inventive problem solving, commercial realism and technical depth together through an integrated architecture and building consultancy offer:

• Using evidence-led tools to map clear decarbonisation and optimisation pathways
• Designing interventions that make existing buildings safer, more flexible and more humane
• Supporting clients through business cases, procurement, delivery and post-occupancy review.

By treating retrofit as a core part of the asset lifecycle, NHS organisations can turn ageing estate from a liability into a platform for better care, better use of public capital and a credible route to net zero carbon.

Making legacy estate work harder for the NHS

Reinventing existing NHS buildings requires more than isolated projects. It calls for portfolio-level insight, technical rigour and long-term partnership.

We work with NHS Trusts, Health Boards, Integrated Care Boards and public sector partners to assess, prioritise and transform legacy estate – combining building consultancy and architectural design to deliver safer, lower-carbon and more adaptable environments.

If you are reviewing your estate strategy, developing a retrofit programme or seeking clearer evidence to support investment decisions, we would welcome a conversation. Get in touch