How much does a hospital electrical installation cost in the UK?

Hospital electrical installation is among the most expensive of any building type, driven by HTM 06-01 compliance requirements, medical grade power systems, UPS infrastructure, and the essential services requirements for life-critical areas. New-build acute hospital costs for the complete electrical installation (excluding medical gas but including essential services, UPS, life-safety systems) are typically £350–£700 per square metre of gross internal area (GIA). A 500-bed acute hospital (approximately 75,000m² GIA) may have an electrical installation value of £25,000,000–£50,000,000. Individual ward refurbishments: £80,000–£180,000 per ward. Operating theatres: £150,000–£400,000+ each.

What is HTM 06-01 and why does it matter for hospital electrical installations?

HTM 06-01 (Health Technical Memorandum 06-01 — Electrical Services Supply and Distribution) is the NHS England guidance document that sets out the design, installation, and maintenance requirements for electrical services in NHS healthcare premises. It supplements BS 7671 and must be used alongside it. HTM 06-01 covers: design of electrical distribution systems, essential services provisions, switchgear and UPS requirements, earthing and protection, electrical safety management, and the documentation required at handover. All electrical work on NHS premises must be carried out in accordance with HTM 06-01 and be independently witnessed and verified.

What is a Group 2 medical location and what electrical systems does it require?

BS 7671 Section 710 classifies medical locations into Group 1 (where failure of supply does not immediately endanger a patient's life — wards, corridors, consultation rooms) and Group 2 (where failure of supply to applied parts used on or in the patient would immediately endanger life — operating theatres, ICUs, catheterisation labs, cardiac surgery wards). Group 2 locations require: medical IT systems (isolated power supplies, IPS) to provide a fault-tolerant power supply with insulation monitoring; automatic changeover to essential services within 0.5 seconds; equipotential bonding to IEC 60364-7-710; and additional RCD protection requirements.

What is a medical IT system (isolated power supply)?

A Medical IT system consists of an isolation transformer (IT — Isolated Terre, meaning the neutral is not connected to earth) that provides a secondary voltage supply with no connection to earth. A line insulation monitor (LIM) continuously monitors the insulation resistance of the secondary circuit and provides an alarm if it falls below approximately 50kΩ. This means a first fault to earth does not cause a circuit breaker to trip and disconnect the supply — critical in an operating theatre where supply continuity is life-critical. The alarm allows time for the fault to be located and rectified in a controlled manner. Each Medical IT panel costs £4,000–£12,000 depending on capacity.

What UPS systems are required in hospitals?

Hospitals require multiple levels of UPS protection. Static UPS systems (double-conversion, online) protect individual critical loads (workstations, servers, monitoring equipment) — typically 1–20kVA per unit. Central UPS systems protect entire critical distribution boards (operating theatre suites, ICU, pharmacy) — typically 20–500kVA. Diesel generators provide standby generation for essential services and must reach full load within 15 seconds of mains failure under HTM 06-01. The combination of UPS and generator ensures no break in supply to Group 2 locations. A hospital standby generation system (1MVA generator): £300,000–£600,000 installed.

How often does a hospital need an electrical inspection?

HTM 06-01 requires that healthcare electrical installations are subject to a formal inspection and testing programme. The frequency is risk-based: Group 2 medical locations (operating theatres, ICU) require annual inspection and testing of all critical systems including IPS panels, ATS, and emergency systems. General ward and clinical areas: every 5 years. Life-safety systems (emergency lighting, fire alarm) have their own annual service requirements. All test results must be recorded in the hospital's electrical safety management system.

What is the cost of an operating theatre electrical installation?

An operating theatre electrical installation is one of the most expensive single-room electrical installations in any building type. A typical UK acute hospital operating theatre electrical installation costs £150,000–£400,000 including: Medical IT system (IPS panel, isolation transformer, LIM): £15,000–£35,000. UPS for anaesthetic and monitoring equipment: £8,000–£25,000. Luminaire infrastructure (surgical lights, task lighting, circadian zone lighting): £20,000–£60,000. Pendants (anaesthetic, surgical — electrical infrastructure): £25,000–£80,000. Emergency lighting and essential services: £8,000–£20,000. Control systems and nurse call: £5,000–£15,000. General power, containment, and earthing: £25,000–£80,000.

HEALTHCARE ELECTRICAL GUIDE

Hospital Electrical Installation Cost UK: Healthcare Electrical Guide 2025

Complete cost guide for UK hospital and NHS healthcare electrical installations. HTM 06-01 compliance, Medical IT systems (IPS), essential services, UPS, standby generation, operating theatre electrical, and costs per ward and department. 200-bed district general hospital: £8,000,000–£18,000,000.

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15 min readUpdated 2026-05-18Andrew Moore, Founder of Elec-Mate

Written and reviewed by Andrew Moore, founder of Elec-Mate, against BS 7671:2018+A4:2026, IET Guidance Note 3 and the IET On-Site Guide.

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Key Takeaways

1Hospital electrical installations are among the most expensive per square metre of any building type in the UK. NHS guidance HTM 06-01 (Electrical Services Supply and Distribution) sets out the mandatory design and installation requirements for all NHS healthcare premises.
2A typical acute hospital ward electrical installation costs £80,000–£180,000 per ward depending on size and patient dependency level. Operating theatres cost £150,000–£400,000+ each for the complete electrical systems.
3Essential electrical services in hospitals must maintain supply to critical loads (operating theatres, ICU, life-support equipment) within 0.5 seconds of a mains failure. This requires automatic transfer switching (ATS) and UPS systems throughout the facility.
4Medical IT systems (isolated power supplies — IPS) are mandatory in Group 2 medical locations (operating theatres, ICUs, cardiac catheterisation labs) under BS 7671 Section 710. IPS panels, isolation monitors, and insulation fault locators are expensive but non-negotiable.
5The NHS's Net Zero ambition (Delivering a Net Zero National Health Service, 2020) means solar PV, battery storage, and low-carbon energy infrastructure are increasingly specified as part of major hospital capital projects.

01 · Healthcare Electrical Guide

Hospital Electrical Installation: Scale and Complexity

Hospital electrical installations represent the highest standard of electrical engineering in the built environment. The combination of HTM 06-01 compliance requirements, BS 7671 Section 710 medical location provisions, essential services infrastructure, and the absolute requirement for supply continuity to life-critical equipment means that hospital electrical work is fundamentally different from any other building type.

Essential services hierarchy — hospital electrical systems are divided into normal supply (utility mains), essential services (generator-backed), and critical essential services (UPS-backed and generator-backed for Group 2 locations). HTM 06-01 defines which loads must be on which supply level.
Medical location classification — BS 7671 Section 710 classifies every room and area by its patient dependency level (Group 0, 1, or 2). Group 2 locations (operating theatres, ICU, cardiac labs) require Medical IT systems and have the most stringent electrical requirements of any building in the UK.
Life-safety systems — emergency lighting to BS 5266-1, fire alarm to BS 5839-1, nurse call, public address and voice alarm (PAVA), and patient entertainment systems — all must coexist and be separately documented.
Specialist contractors — NHS hospital electrical work is typically carried out by contractors with specific healthcare sector accreditation (NICEIC Healthcare Approved, or equivalent) and is subject to independent commissioning and verification by the client's authorised engineer (electrical).

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02 · Healthcare Electrical Guide

HTM 06-01 Compliance Requirements

Health Technical Memorandum 06-01 (Electrical Services Supply and Distribution) is the definitive guidance document for electrical installations in NHS England healthcare premises. It must be read alongside BS 7671 and takes precedence where requirements differ.

Distribution system design — HTM 06-01 requires a ring-main or dual-fed distribution architecture for essential services to ensure continuity of supply if a cable section is lost. Single-radial feeds to essential services boards are not acceptable. This significantly increases cable costs compared to equivalent commercial installations.
Switchgear and automatic transfer — all essential services panels must have automatic transfer switching (ATS) with a maximum changeover time to generator supply of 15 seconds (5 seconds for critical essential services). ATS panels must be tested regularly and documented.
Earthing and bonding — hospitals require multiple earthing systems: TN-S (utility supply), IT (Medical IT in Group 2 locations), and equipotential bonding in clinical areas. All equipotential bonding must be to IEC 60364-7-710 and independently tested.
Documentation and handover — HTM 06-01 requires comprehensive as-built drawings, test results, commissioning records, O&M manuals, and a formal handover to the client's authorised engineer (electrical). Documentation requirements are far more extensive than for standard commercial projects.

03 · Healthcare Electrical Guide

Medical Grade Electrical Systems

Medical grade electrical systems are those designed specifically for clinical environments where supply failure or electrical fault could directly endanger patient life. The primary medical grade electrical system is the Medical IT (Isolated Power Supply) system mandated in Group 2 locations by BS 7671 Section 710.

Medical IT panel (IPS) — contains the isolation transformer, line insulation monitor (LIM), and distribution to medical outlets. The LIM continuously monitors insulation and sounds an alarm at the first fault — without tripping the circuit. Cost per panel: £4,000–£12,000. A typical operating theatre complex may have 6–12 IPS panels.
Surgical pendants (electrical infrastructure) — surgical and anaesthetic pendants deliver electrical power, medical gas, data, and lighting to the patient zone without floor-level cables. The electrical infrastructure for each pendant arm (conduit, cable, connection box) costs £3,000–£8,000 to install. The pendant itself is a separate procurement.
Medical outlets — IEC 60309 (BS EN 60309) blue 16A or 32A industrial outlets are used in clinical areas for medical equipment connection. These are more robust than standard 13A sockets and are colour-coded to distinguish between normal, essential, and critical essential supplies.
Equipotential bonding rail — a copper equipotential bonding rail is installed in each clinical area, connected to the hospital earth bar. All metal equipment frames in the clinical area are bonded to this rail to prevent potential differences that could cause microshock.

04 · Healthcare Electrical Guide

Essential Services and UPS Systems

Hospital essential electrical services are the systems that maintain power to life-critical loads when the normal utility supply fails. HTM 06-01 defines three categories of supply and the transfer times required for each.

No-break supply (UPS) — provides uninterrupted power to the most critical loads: operating theatre lighting and equipment, ICU life-support, cardiac monitoring. Achieved by online double-conversion UPS systems with battery autonomy of 15–60 minutes pending generator start. Cost per 20kVA UPS unit: £8,000–£20,000. A large theatre complex may require central UPS of 100–500kVA: £60,000–£200,000.
Essential services (generator within 15 seconds) — covers critical clinical areas, emergency lighting, fire alarm, lift power, and key HVAC systems. Achieved by automatic transfer switching to standby generator. Hospital generators: 500kVA–4MVA depending on bed count. A 1MVA hospital generator set: £200,000–£500,000 installed.
Normal supply — non-critical loads (outpatient waiting areas, offices, catering non-essential equipment, car parks) remain on normal utility supply only. These loads are shed under generator running to reduce generator demand.
ATS (Automatic Transfer Switching) — ATS panels monitor the mains supply and automatically switch to generator upon failure. Open-transition ATS (brief supply break) for non-critical loads; closed-transition ATS (no break) for critical loads. ATS panel cost: £3,000–£20,000 depending on current rating and transition type.

05 · Healthcare Electrical Guide

Electrical Costs Per Ward and Department

Hospital electrical costs are often expressed on a per-ward or per-department basis for budgeting and planning purposes. The figures below represent 2025 costs for UK NHS acute hospital refurbishment projects.

General acute ward (28–32 beds) — £80,000–£140,000. Group 1 medical location requirements. Nurse call, bedhead trunking with IEC 60309 outlets, staff base lighting, emergency lighting.
High dependency unit (HDU, 8–12 beds) — £120,000–£220,000. Elevated outlet density, enhanced monitoring infrastructure, partial Group 2 requirements at some bed positions.
Intensive Care Unit (ICU, 8–12 beds) — £180,000–£380,000. Full Group 2 requirements, Medical IT systems, UPS, extensive bedhead infrastructure, higher outlet density (20–30+ outlets per bed position).
Outpatient department (per suite) — £40,000–£90,000. Consultation rooms, waiting areas, reception, basic clinical rooms. Group 1 requirements.
Pharmacy — £35,000–£80,000. Controlled drug security systems, cold storage monitoring circuits, laboratory lighting, UPS for dispensing systems.
Radiology / imaging department — £90,000–£200,000. High-power imaging equipment (MRI, CT — kVA loads requiring dedicated 3-phase supply), RF screening (MRI rooms), UPS for imaging systems.

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06 · Healthcare Electrical Guide

Operating Theatre Electrical Installations

Operating theatres are the most electrically complex and expensive single-room installations in the built environment. The combination of Group 2 medical location requirements, laminar flow HVAC electrical integration, surgical lighting infrastructure, and supply resilience requirements make theatre electrical work highly specialised.

Medical IT system (IPS) — each operating theatre requires at least one dedicated Medical IT panel (typically 8–16kVA transformer). Some larger theatres require two IPS panels (one for anaesthetic zone, one for surgical zone). Cost per IPS panel: £6,000–£14,000.
Surgical lighting — ceiling-mounted surgical luminaires (Maquet, Trumpf, Stryker) require a 13A–32A circuit and structural reinforcement to the ceiling slab. A twin-dome surgical light with satellite display arm: £18,000–£50,000 for the fitting. Electrical infrastructure: £2,500–£5,000.
Anaesthetic machine circuit — a dedicated 32A 3-phase circuit for the anaesthetic machine. This circuit must be on the Medical IT system and UPS-backed. Separate circuit for the anaesthetic agent evacuator (scavenging system blower).
TIVA (Total Intravenous Anaesthesia) infrastructure — ceiling- or pendant-mounted syringe driver bars require power, data, and nurse call integration. Electrical supply: 4 x 13A IEC outlets per bar position.

A complete four-theatre suite (four operating theatres, anaesthetic rooms, scrub rooms, recovery) typically costs £2,500,000–£5,000,000 for the complete MEP (mechanical, electrical, and plumbing) package, of which electrical typically represents 30–40%.

07 · Healthcare Electrical Guide

Fire Alarm and Emergency Lighting in Hospitals

Hospital fire alarm and emergency lighting systems must comply with BS 5839-1 and BS 5266-1 respectively, with additional requirements imposed by HTM 06-01, the NHS Fire Safety Policy, and Firecode (the NHS fire safety guidance series).

Fire alarm — Category L1 — hospitals require full property coverage automatic detection (Category L1 to BS 5839-1) across all areas including patient rooms, plant rooms, and roof voids. An addressable fire alarm system is mandatory for a building of this complexity. Large hospitals may have 1,000–5,000+ detectors on a single fire alarm system.
Refuge communication systems — fire-fighting lifts and refuge areas must have two-way voice communication systems (compliant with BS 5839-9) linked to the building management centre. These are wired as part of the fire alarm installation.
Emergency lighting — 3 hours minimum — BS 5266-1 requires 3-hour emergency lighting duration for premises with sleeping accommodation. Central battery systems (CBS) are the norm in large hospitals, providing centralised battery management and monitoring for the entire emergency lighting installation.
PAVA (Public Address and Voice Alarm) — large hospitals require a BS 5839-8 compliant PAVA system for emergency announcement and evacuation management. PAVA system installation for a district general hospital: £80,000–£250,000.

08 · Healthcare Electrical Guide

Hospital Electrical Installation Cost Breakdown 2025

The following costs are indicative for a new-build or major refurbishment of a 200-bed district general hospital (approximately 30,000m² GIA). Labour and materials excluding VAT.

HV/LV distribution and main switchgear — £800,000–£2,000,000. HV substation, main LV switchboards, essential services switchgear, cable routes.
Standby generation (2 x 1MVA generators) — £600,000–£1,200,000. Includes generators, fuel storage, ATS panels, and containment.
UPS systems (theatre suite and ICU) — £400,000–£900,000.
Medical IT systems (IPS panels) — £150,000–£350,000. Operating theatres, ICU, cardiac labs.
Ward and clinical electrical (8 wards, 2 ICU) — £1,200,000–£2,500,000.
Operating theatres (4 theatres complete) — £600,000–£1,600,000.
Fire alarm (Cat L1, addressable) — £300,000–£700,000.
Emergency lighting (CBS, 3-hour) — £200,000–£500,000.
Total — 200-bed district general hospital — £8,000,000–£18,000,000. Per m²: £270–£600. New-build 500-bed acute hospital total electrical: £25,000,000–£50,000,000.

09 · Healthcare Electrical Guide

For Electricians: Working in Healthcare Electrical

Hospital and healthcare electrical work is a specialist discipline that requires specific training, accreditation, and an understanding of HTM 06-01, BS 7671 Section 710, and the NHS's authorised engineer (electrical) governance structure. Contractors who develop this specialism work on high-value, long-term NHS frameworks.

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Frequently Asked Questions: Hospital Electrical Installation Costs

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Hospital Electrical Installation Cost UK: Healthcare Electrical Guide 2025

Key Takeaways

Hospital Electrical Installation: Scale and Complexity

Get the BS 7671 A4:2026 Cheat Sheet — free

HTM 06-01 Compliance Requirements

Medical Grade Electrical Systems

Essential Services and UPS Systems

Electrical Costs Per Ward and Department

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Operating Theatre Electrical Installations

Fire Alarm and Emergency Lighting in Hospitals

Hospital Electrical Installation Cost Breakdown 2025

For Electricians: Working in Healthcare Electrical

Document Complex Installations

Manage healthcare electrical contracts with Elec-Mate

Frequently Asked Questions: Hospital Electrical Installation Costs

How much does a hospital electrical installation cost in the UK?

What is HTM 06-01 and why does it matter for hospital electrical installations?

What is a Group 2 medical location and what electrical systems does it require?

What is a medical IT system (isolated power supply)?

What UPS systems are required in hospitals?

How often does a hospital need an electrical inspection?

What is the cost of an operating theatre electrical installation?

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