Many commercial buildings require major mechanical and electrical upgrades while remaining fully operational. Delivering M&E upgrades in live buildings presents a unique set of challenges, particularly where heating, cooling, or power infrastructure must be replaced without interrupting day-to-day operations. Careful planning, out-of-hours working, and phased delivery are critical to ensure building users remain unaffected.
Hawley Building Services specialises in live building M&E upgrades across retail, commercial, and care environments. These projects typically involve boiler replacements, plantroom refurbishments, heating system upgrades, and electrical infrastructure modifications, all delivered within occupied buildings. Acting as an out-of-hours M&E contractor, we work around store trading hours, resident requirements, and operational constraints to minimise disruption.
A recent project involved the replacement of ageing gas boilers within a well-known national retailer in Waterlooville. The store remained fully operational throughout, with all works undertaken overnight to avoid disruption to customers and staff. The existing plantroom contained obsolete and inefficient gas boilers which had become unreliable and increasingly costly to maintain, with limited access and restricted working windows adding to the complexity.
Hawley Building Services carried out a full commercial boiler replacement, removing the existing plant and installing new high-efficiency Hamworthy gas boilers. The works included plantroom modifications, new distribution pipework, upgraded controls, flue modifications, and full testing and commissioning. While this was a gas-for-gas replacement, the new high-efficiency boilers significantly improved system performance, reduced energy consumption, and lowered operating costs for the client.
The project was delivered as a true silent contractor within a live retail environment. All works were completed out of hours, with the store opening as normal each morning. Careful planning, prefabrication, and phased changeovers allowed heating services to be maintained throughout the upgrade. The only real sign we’d been there was a slightly reduced supply of Percy Pigs the following morning.
This type of heating system upgrade highlights that while heat pumps and full electrification are often discussed, they are not always the correct solution for every building. In many existing commercial buildings, improving efficiency through modern high-efficiency gas plant can provide immediate energy savings with lower disruption, reduced capital cost, and faster programme delivery. Selecting the correct engineering solution is critical when working in occupied buildings where downtime is not an option.
Hawley Building Services has delivered similar live building boiler replacements within occupied care facilities. At a Bupa care home in Birkenhead, we replaced ageing boiler plant with new high-efficiency gas boilers while maintaining heating and hot water to residents throughout the works. This required careful phasing, temporary arrangements, and coordination with site management to ensure resident comfort was maintained at all times. The upgrade improved reliability, reduced maintenance requirements, and delivered improved energy efficiency for the facility.
Live building M&E upgrades often require a combination of technical planning and practical delivery. These can include commercial boiler replacements, plantroom refurbishments, heating distribution upgrades, electrical capacity upgrades, controls modernisation, and staged commissioning. Works are typically coordinated around building operation, with night working, weekend access, and temporary systems used where required.
Hawley Building Services’ experience as a live building M&E upgrade specialist allows complex mechanical and electrical upgrades to be delivered safely and efficiently. Whether the solution involves heat pumps, hybrid systems, or high-efficiency gas plant, the focus is always on delivering the right engineering solution while maintaining building operation and minimising disruption.
