Together we deliver a service that exceeds expectations.

We recognise that every site & client is different, so we tailor our approach to your specific needs.


Our highly trained experienced consultants & technicians deliver an extensive range of water & air system services.

We do this by also taking the time listen to & empower our clients through sharing our knowledge.

We partner with independent UKAS accredited laboratories to undertake our water & air analysis.

  • Legionella Risk Assessments.
  • Cooling tower analysis, sampling, control programme design, treatment & mechanical service inspection & refurbishment.
  • Hot & cold water system services sampling, disinfection & refurbishment.
  • Calorifier / cold water storage tank inspections, refurbishment, replacements, descaling & disinfection works.
  • Indoor air quality monitoring, sampling & deposit thickness testing.
  • Ductwork & kitchen extract cleaning, refurbishment and replacement.
  • Closed water system analysis, sampling & protective treatment programmes.
  • Steam boiler/ generator analysis & service to plant & systems.
  • Water softening & system disinfection plant installation, repair & refurbishment & associated service & inspection.


We provide detailed reports together with constructive, proactive recommendations to ensure the safe, compliant & effective management of your systems.

ONE Environmental Ltd are a certified member of the LCA and are regularly audited and assessed by the LCA for compliance with their Code of Conduct for Service Providers and the Service Standards for those legionella control services for which we are registered. Our membership of the LCA, the management systems we have developed and our compliance with the Code and Service Standards means that we are well placed to assist our clients in controlling the legionella risk associated with their water systems.


Our priorities are to exceed the expectations of our customers.

We are committed to developing long terms relationships to proudly become your trusted commercial gas services partner.

  • Our fully qualified commercial installation engineers are highly adept at every element of installation including all makes & models of boilers.
  • We draw on our expertise to analyse each project to design the most suitable solution in terms of timeline, cost, performance, efficiency.
  • Whatever type of pipework project you require, from a small pipe repair to full replacement, our operatives are ready to meet your needs as we work across London & the Home Counties.
  • Our existing portfolio of clients range from local authorities to premium sports clubs & they regard us as their trusted emergency service in times of need.


We utilise the latest technology & training techniques to enhance our services offering. We have a pragmatic approach & continually strive to develop & improve our services.


Our engineers have years of ingenious problem-solving experience & are familiar with every type of pump product, working in all kinds of interesting locations & conditions. If a project should require additional demands, we really come into our own.

  • Assessment of the pump in situ, looking for any damage, leaks, undue vibration or other problems.

  • Submersible sewage/drainage pumps will be removed for physical inspection.

  • Clean & check of float controls in any sumps.

  • Analysis of all electrical connections to pumps & controls.

  • Electrical current readings.

  • Full inspection of control panel & their components.

  • Operation check of high-level alarm unit, or other warning systems.

  • Run & test of pump & control units.

  • Report on completion of service, noting any immediate remedial action or advisory notices for future consideration.

  • We are the perfect partner when you have a pump that needs servicing, repair or replacement.


We strive to give our clients absolute peace of mind in knowing that they will receive the right pump for the job. There is always a welcoming voice at the end of the phone, whether to despatch a team to site or offer clients the best service & advice in the industry.


We maintain all the relevant industry accreditations & all our engineers are qualified in their roles, giving our clients the peace of mind that drainage problems will be dealt with quickly, efficiently & to a high standard of quality.

  • High pressure drain jetting be it clearance or routine cleaning.
  • Small bore drain cleaning & blockage clearance.
  • CCTV drainage surveys.
  • Re-lining & repairs.
  • Tanker service.
  • Drainage pump servicing/repair.
  • Installation of new drainage stations.
  • Gutter down pipe cleaning.


Our team work together to combine skills & experience to provide a holistic approach to assist clients to plan, design & develop effective flooding & drainage solutions.


Learning from our experience on both large & small-scale water infrastructure projects, we offer proactive advice & recommendations they need to enhance flood resilience for their portfolio or building.


Through inspections, cleaning, repairs or renovations in drains, sewers, manholes & septic tanks, our commitment to innovation, integrity & collaboration guides our every action, removing the problem of wastewater from you building quickly & effectively.


The majority of our engineers have over 10 years of experience, so no problem is too big or complicated for them.  Only the most experienced of engineers work alone, all others operate in pairs, to ensure that there is always a senior engineer in attendance.


We value our customers & strive to build long standing relationships with them so that we can truly understand their specific needs to ensure we deliver exactly the service & results they require.

We offer a wide range of fabric services to businesses large & small, including:

  • Minor building works.
  • Ceilings.
  • Joinery.
  • Tiling.
  • Plastering.
  • Painting.
  • Flooring.
  • Handyman service.


We pride ourselves in our innovative approach & ‘can do’ attitude.
When faced with a problem, our team are encouraged to use their skills & experience to find an agreeable remedy, safely, whilst ensuring the work meets legislation & regulations.


We encourage our team to innovate, we believe this gives us a competitive edge & the ability to adapt, we are all constantly leaning improve processes, source new products, & generate new ideas.


We work with you to ensure that we plan & undertake fabric works with the minimal disruption to your business as possible.


As we endeavour create a great working relationship that will evolve into a long-term partnership, we like to help them grow & in return we grow with them.


We work to the highest standards. Our aim is to deliver on our philosophy of ‘first-time-fix’ whether it be our helpdesk, site engineers or delivery teams.

We focus on consistency in quality, safety & environment.

  • Maintenance of your plant & systems to meet & exceed industry standards.

  • Life cycle plant replacement of boilers, pumps, chillers, fan terminal units, air handing units & related systems.

  • Re-active plant repair or replacement.

  • Small works department.

  • Project management.

  • Compliance services.

  • Building automation.


We have undertaken  plant replacement works & installations in hospitals, commercial office spaces, retail outlets & sports venues for over 10 years. That’s why we can offer innovative solutions for heating cooling & ventilation systems, whatever your HVAC requirements.



We provide recommendations based on our expertise to ensure your systems can be repaired or replaced to meet your needs & budget.


We appreciate that be it be an office building, retail outlet, sports venue, or school or more specialised for the health industry it is much more than the sum of its parts.


We enjoy a strong reputation for finding the best solutions to complex property challenges which are delivered by our outstanding engineers.


We believe in continuity & use dedicated engineers to ensure familiarity with each of the sites we manage. This ensures quick responses & minimal down-time.


We have a collaborative approach with our clients, based on mutual trust & long-term relationships.

We are professional, passionate, open & honest. We always take a methodical & common-sense approach to delivering our projects.

Our success is built on our extensive service offering & going the extra mile for our customers.