Hennessy Ltd offers expert electrical and plumbing services for residential, commercial, and industrial clients in London. Compliant, reliable, and professional.
We provide a comprehensive range of service works to meet your needs:

Full electrical installations for new builds and refurbishments
Rewiring and electrical upgrades
Lighting design and installation, including energy-efficient LED systems
Electrical fault finding and repairs
Safety inspections and testing (e.g., EICR reports)

Complete plumbing installations for bathrooms, kitchens, and heating systems
Pipework repairs and replacements
Boiler installations, servicing, and repairs
Drainage solutions and unblocking
Water heater and pump installations

Gas safety checks and installations (where applicable)
Smart home system integrations for lighting and heating
Emergency repair services for urgent issues
At Hennessy Ltd, safety and compliance are paramount. All our electrical and plumbing work adheres to the latest UK industry regulations, including:
Electrical: Compliance with BS 7671 (IET Wiring Regulations) and Part P of the Building Regulations.
Plumbing: Adherence to Water Supply (Water Fittings) Regulations and Gas Safe standards (where applicable).
Certifications: Our team is fully qualified, and we provide certification for all completed work to ensure peace of mind.


We offer ongoing maintenance to keep your systems in top condition:
Routine inspections and servicing for electrical and plumbing systems
Preventative maintenance to avoid costly breakdowns
Emergency call-out services for rapid response to issues
Tailored maintenance contracts for commercial and industrial clients
Our service works are designed to meet the diverse needs of:


