Maintenance & Service Contract Packages
Keep your building management systems running at peak performance with our comprehensive maintenance packages and service contracts.
At a glance
Updated
BMS maintenance in London, Kent and the South East from Alpha Controls costs £795, £1,450 or £2,690 a year per site (excluding VAT) for one, two or four planned visits, on Trend, Tridium Niagara, Distech and Siemens systems — including systems another contractor installed. Emergency callouts start at £650 for the first four hours on a weekday, £975 evenings and Saturdays, and £1,300 overnight, Sundays and public holidays.
- Maintenance contract
- £795 / £1,450 / £2,690 a year
- Essential (1 visit), Standard (2 visits) or Enhanced (quarterly), per site
- Emergency callout
- from £650 / £975 / £1,300
- Weekday, evening and Saturday, or overnight, Sunday and public holiday — first 4 hours on site
All prices exclude VAT. Packages are per site for a single plant room with up to six controllers and one supervisor; larger estates are priced against the asset list. Callout figures are the non-contract minimum charge for the first four hours and, inside Greater London and the M25, include travel, mileage, the Congestion Charge and ULEZ; travel is also included within 40 miles of Gravesend. Contract customers receive 10% or 15% off callouts. Source: our AC-SOR-2026-01 Rev A schedule of rates.
- What we do
- Planned preventive maintenance, fault diagnosis, emergency callout, and system optimisation under contract.
- Where
- London, Kent, Essex, Surrey and Sussex, from our base in Gravesend.
- Who it’s for
- Facilities managers, managing agents and building owners with an existing BMS to keep running.
- One, two or four planned visits a year, depending on package
- Priority attendance and 10% or 15% off callouts on Standard and Enhanced
- Support for systems installed by other contractors
- Software updates and performance reporting
- Remote monitoring where the installed system supports it
Maintenance Packages
Annual charge per site, excluding VAT, for a single plant room with up to six controllers and one supervisor. Larger estates are priced from the same schedule against the asset list.
£795 / year + VAT
- 1 planned maintenance visit a year
- Written engineer report after every visit
- Off-site backup of strategies, graphics and software
- Telephone technical support in working hours
- Critical alarm monitoring available as an option
£1,450 / year + VAT
- 2 planned maintenance visits a year
- Written engineer report after every visit
- Off-site backup of strategies, graphics and software
- Telephone support and remote assistance in working hours
- Priority attendance ahead of non-contract work
- 10% off all callout rates
£2,690 / year + VAT
- 4 planned maintenance visits a year (quarterly)
- Written engineer report after every visit
- Off-site backup of strategies, graphics and software
- Telephone support and remote assistance in working hours
- Critical alarm monitoring, up to 10 alarms
- Annual system condition and obsolescence report
- 4-hour P1 attendance target and priority attendance
- 15% off all callout rates
What BMS Maintenance Involves
Understanding what happens during a scheduled visit — and why it matters.
- Controller health checks — verifying CPU status, memory, and comms integrity
- Sensor calibration verification — confirming temperature, humidity, and CO₂ sensors are reading accurately
- Actuator stroke testing — checking damper and valve actuators move through their full range
- Software trend review — examining logged data for anomalies, drift, or inefficient control sequences
- Alarm log audit — reviewing active and historical alarms to identify recurring faults
- Time schedule review — ensuring occupancy, setback, and holiday schedules are current and correct
- Condition report — a written summary of findings, recommended actions, and risk ratings
Reactive maintenance — responding only when a system fails — almost always costs more than planned servicing. A failed actuator discovered during a routine visit is a minor parts-and-labour expense. The same fault left undetected can cause a heating or cooling zone to run unchecked for months, wasting energy and masking deeper control issues.
Preventive BMS maintenance visits surface small faults before they escalate. Sensor drift is corrected before it causes occupant complaints. Alarm floods are traced back to root causes rather than silenced. Time schedules are kept aligned with actual occupancy patterns, delivering measurable energy savings across the building.
For building owners and facilities managers across London and the South East, a structured preventive maintenance contract with Alpha Controls means fewer emergency callouts, lower energy bills, and a system that reliably delivers the comfort conditions your occupants expect.
Third-Party System Support
Alpha Controls maintains BMS installations regardless of who originally designed or commissioned them. You are not tied to your original contractor.
Full support for the Trend IQ series controller range and the IQVISION supervisor platform, including IQ3, IQ4, and legacy IQ2 hardware.
Maintenance and fault diagnosis for Distech ECB series controllers and the ECLYPSE Connected System platform.
Support for Honeywell WEBS-AX and WEBS-N4 supervisor platforms and the associated field controller estate.
Servicing and optimisation for Siemens DESIGO CC building management platform and PXC controller hardware.
Maintenance for Schneider Electric EcoStruxure Building Operation and legacy TAC Vista and Andover Continuum systems.
We support legacy and proprietary BMS installations where the original vendor or contractor is no longer available or the system has reached end-of-life support.
One contractor. Full support. No lock-in.
Whether your building runs a single BMS platform or a mixed estate of controllers from multiple vendors, Alpha Controls provides a single point of contact for all maintenance, fault diagnosis, and system improvements. We work to manufacturer-approved procedures and carry manufacturer certification where available.
Remote Monitoring & Alarm Management
Proactive fault detection that means problems are often resolved before your facilities team is even aware they exist.
On the Enhanced package, Alpha Controls monitors up to ten critical alarms you nominate from your BMS supervisor. Each alarm is triaged against our P1–P3 response priorities to decide whether it needs remote intervention, an engineer visit, or logging for review at the next planned visit. Critical alarm monitoring can be added to Essential or Standard for £480 a year per site.
Many faults — a runaway setpoint, a stuck actuator command, an incorrect time schedule — can be corrected remotely via the supervisor platform without any site attendance required. This reduces disruption to building occupants and cuts the cost of reactive callouts significantly.
Remote monitoring is available for Trend IQVISION, Distech ECLYPSE, Honeywell WEBS-N4, Siemens DESIGO CC, and Schneider EcoStruxure Building Operation. Where a site has an older supervisor, our engineers can advise on upgrade options that make remote connectivity viable.
- Monitoring of up to 10 nominated critical alarms
- Real-time fault triage — urgent, advisory, or log-only categorisation
- Remote remediation of software-level faults where possible
- Monthly alarm summary reports with trend analysis
- Escalation to on-site attendance when remote resolution is not possible
- Integration with your facilities helpdesk or CAFM system on request
Critical alarm monitoring is included in the Enhanced maintenance package. Speak to our team to discuss connectivity requirements and whether your existing supervisor platform supports secure remote access.
Frequently Asked Questions
Common questions about BMS maintenance contracts and what to expect.
Yes. The majority of systems we maintain were installed by other contractors or as part of large construction projects where the original systems integrator is no longer involved. Provided we can obtain adequate system documentation — or reverse-engineer it from the installed hardware — we can take on full maintenance responsibility. We cover Trend, Distech, Honeywell, Siemens, Schneider Electric, and a range of older proprietary platforms.
A typical preventive maintenance visit includes a controller health check, sensor calibration verification, actuator stroke testing, a software trend and alarm log review, a time schedule audit, and a written condition report. The frequency of visits depends on your chosen package: one visit a year on Essential, two on Standard, and four (quarterly) on Enhanced. All visits are carried out by qualified BMS engineers holding manufacturer training where applicable.
Yes. Callouts are charged in three bands: Standard (weekdays 08:00–17:00) from £650, Extended (weekday evenings and Saturdays) from £975, and Premium (overnight, Sundays and public holidays) from £1,300, each covering the first four hours on site. For a P1 critical fault the attendance target is 4 hours on an Enhanced contract and the next working day on Standard; Standard and Enhanced customers also receive 10% or 15% off every callout. We cover London, Kent, Surrey, Essex and Hertfordshire for on-site attendance.
For a single plant room with up to six controllers and one supervisor, our packages cost £795 (Essential, one visit), £1,450 (Standard, two visits) or £2,690 (Enhanced, four visits) a year per site, excluding VAT. Larger estates are priced from the same published schedule of rates against the confirmed asset list. Callouts, spares and remedial works are charged separately at the scheduled rates.
Alpha Controls provides BMS maintenance contracts across London, Kent, Surrey, Essex, and Hertfordshire. Contact us for a maintenance proposal tailored to your building.
Why Choose Our Maintenance Services?
Regular maintenance ensures your systems operate efficiently, reduces downtime, and extends equipment lifespan.
- Prevent costly breakdowns and emergency repairs
- Maintain optimal system performance and efficiency
- Extend the lifespan of your equipment
- Ensure compliance with regulations
- Priority response for contract customers
- Detailed maintenance reports and recommendations
- Budget-friendly fixed annual costs
- Peace of mind with expert support
Frequently Asked Questions — BMS Maintenance
What is included in a BMS planned preventive maintenance contract?
A BMS PPM contract from Alpha Controls includes: scheduled visits (typically twice yearly) to inspect, test, and clean all controllers, sensors, and actuators; software backup of all controller programmes; review and adjustment of control schedules and setpoints; trending and alarm analysis; minor software changes within agreed hours; and a written service report after each visit. Our Standard and Enhanced packages add more visits, remote assistance in working hours and discounted callouts; Enhanced also includes critical alarm monitoring and an annual condition and obsolescence report.
How often should a building management system be serviced?
Industry best practice (CIBSE AM14) recommends a minimum of two BMS maintenance visits per year for occupied commercial buildings — typically one in spring and one in autumn, aligned with the changeover between heating and cooling seasons. Buildings with critical plant such as data centre cooling or healthcare HVAC should have quarterly visits as a minimum. Alpha Controls advises on the appropriate frequency based on your building type and criticality.
What emergency callout response times do you offer?
Callouts are available across London and the South East from our base in Gravesend, Kent. For a P1 critical fault — total loss of heating, cooling or ventilation to an occupied area — an engineer acknowledges within one hour, and the attendance target is 4 hours on an Enhanced contract or the next working day on Standard. Without a contract, attendance is on a reasonable-endeavours basis subject to engineer availability. Callouts start at £650 for the first four hours on a weekday.
Can Alpha Controls maintain a BMS installed by another company?
Yes. Alpha Controls regularly takes over maintenance of Trend, Distech, Siemens, Honeywell, and Tridium Niagara systems installed by other contractors. We begin with a full system audit that documents the as-installed configuration, identifies any outstanding defects, and establishes a baseline for future maintenance. Access credentials are transferred to Alpha Controls, and we take full responsibility for the system from handover.
What is the difference between planned preventive maintenance and reactive maintenance?
Planned preventive maintenance (PPM) is scheduled work carried out on a regular basis to keep the BMS in good working order — regardless of whether a fault has occurred. Reactive maintenance is carried out in response to a reported fault or failure. PPM significantly reduces the frequency and severity of reactive callouts by catching issues before they cause system failures. Alpha Controls recommends a PPM contract as the foundation, with reactive callout cover as a safety net for unexpected failures.
Ready to Protect Your Investment?
Contact us today to discuss the right maintenance package for your building systems.
Request a Quote