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Changes to Plumbing Regulations in 2025

Published: 20 Aug 2025 ・ Read time: 7 Mins
Navigating plumbing and building regulations in the UK is crucial for the construction and trade industries. These rules ensure safety, efficiency, and sustainability. Staying up to date is essential, not just for compliance, but also for professional practice and the long-term integrity of buildings.
At City Plumbing, we help those in the trade stay compliant with new rules. Here, we highlight current changes in plumbing regulations and the importance of staying updated.

Why It’s Important to Stay on Top of Building Regulations

Compliance with building regulations is paramount for several reasons:
  • Safety and Health: Regulations are designed to protect occupants from hazards such as structural collapse, fire, and unsanitary water systems. For plumbers, this includes preventing cross-contamination, ensuring safe hot water temperatures to avoid scalding, and maintaining proper drainage to prevent the build-up of harmful bacteria.
  • Legal Compliance and Avoidance of Penalties: Non-compliance can lead to legal action, fines, and even imprisonment in the worst cases. Work that does not meet regulations can also result in an enforcement notice, requiring the work to be altered or removed at the owner's expense.
  • Professional Reputation and Trust: For professionals, adherence to regulations builds a reputation for quality, reliability, and credibility. This fosters trust with clients and industry partners.
  • Energy Efficiency and Sustainability: Modern regulations are increasingly focused on environmental impact. This includes measures to improve energy efficiency, reduce carbon emissions, and promote water conservation, which is a key part of the UK's net-zero targets.
  • Insurance and Property Value: Buildings that do not comply with regulations can be difficult to insure, and a lack of compliance certificates can devalue a property or cause issues during a sale.

Changes to Plumbing Regulations in 2025 UK

While there haven't been sweeping changes to plumbing-specific regulations in 2025, the industry is significantly impacted by broader building regulation updates, particularly those related to the Future Homes Standard and the Building Safety Act 2022. The main changes that have a direct or indirect impact on plumbing work are:
  • Future Homes Standard (FHS): While the final regulations are expected to be published in late 2025 and enacted by 2026, the industry is already preparing for its implementation. The Future Homes Standard aims to ensure all new homes built from 2025 onwards produce 75-80% fewer carbon emissions compared to those constructed under previous regulations. This will be achieved by banning fossil-fuel boilers in new homes and mandating high levels of energy efficiency.
The Impact on Plumbing
This is a monumental shift for plumbers. It requires a move away from traditional gas boilers and towards low-carbon heating systems like heat pumps (both air source and ground source), which operate at a lower flow temperature (under 55°C). Plumbers must be trained and certified to install, service, and maintain these new systems.
  • Building Safety Act 2022: This act, a response to the Grenfell Tower tragedy, introduces a more stringent regulatory system for higher-risk buildings (HRBs). While it primarily focuses on fire safety and structural integrity, it has implications for plumbing systems. The act places greater accountability on dutyholders, including plumbers, to ensure their work meets safety standards throughout the building's lifecycle. This means more rigorous record-keeping and a "golden thread" of information about the building's design and construction.
  • Amendments to Approved Document B: Changes taking effect in March 2025 focus on fire safety provisions, including new requirements for sprinklers in care homes. This directly impacts the design and installation of plumbing and fire suppression systems in these buildings.

Key Changes in 2025 Building Regulations  – A Timeline

  • January 1, 2025: The NHBC Standards 2025 come into effect for new homes registered with them, with new or updated technical information affecting various clauses, including those related to drainage.
  • March 2, 2025: Amendments to Approved Document B (fire safety) take effect in England, introducing new provisions for sprinklers in care homes and updating fire safety information requirements (Regulation 38).
  • Autumn 2025 (Expected): The final regulations for the Future Homes Standard are anticipated to be published.

Deep Dive into the Three Most Recent Building Regulation Changes (2022-2024)

The groundwork for the 2025 changes was laid in previous years. The most significant changes affecting plumbers in the recent past have been in Part L (Conservation of fuel and power) and Part F (Ventilation) of the Building Regulations.
  1. Changes to Part L (June 2022): This was a major update that had a direct and immediate impact on the plumbing and heating industry.
Maximum Flow Temperature: A key change was the introduction of a maximum flow temperature of 55°C for new and replacement wet central heating systems in new builds. The goal is to make homes "heat pump ready" and encourage the installation of low-temperature heating systems.
Pipe Insulation: New rules were introduced requiring all primary circulation pipes, including those under floors and in walls, to be insulated to prevent heat loss. Plumbers must now provide photographic evidence to building control to prove compliance.
2. Changes to Part F (June 2022): This focused on ventilation and its interplay with energy efficiency.
Ventilation Standards: The changes required higher standards of ventilation in new and refurbished properties to combat the "airtight" nature of modern, energy-efficient buildings. Plumbers must work alongside ventilation specialists to ensure systems are correctly designed and installed to prevent issues like condensation and mould, which can affect a property's plumbing infrastructure.
3. Future Homes Standard Pre-cursor (Ongoing): While not a single, definable change, the period from 2022-2024 has seen a continuous push towards the principles of the Future Homes Standard.
Low-Carbon Heating: The changes to Part L, combined with government grant schemes like the Boiler Upgrade Scheme, have actively encouraged a shift towards low-carbon heating. This has been a de-facto regulation change, requiring plumbers to acquire new skills and certifications in installing heat pumps and other renewable heating systems.

What's Expected For UK Building Regulations in 2025/26

The focus for the next couple of years will be on the finalisation and implementation of the Future Homes Standard. This is the biggest regulatory change on the horizon.
  • Final Future Homes Standard Legislation: Expect the final details of the FHS to be published, which will define the new energy efficiency and heating requirements for all new homes.
  • Increased Enforcement: The Building Safety Regulator (BSR) is expected to ramp up its oversight and enforcement activities, particularly on higher-risk buildings.
  • Upskilling the Industry: There will be a significant need for training and upskilling in the plumbing and heating sector to handle the widespread adoption of heat pumps and other low-carbon technologies.

City Plumbing Supports The Trade Industry 

The industry is in a period of significant transition, moving towards a more sustainable and safety-conscious future. For plumbers and other tradespeople, this means continuous professional development is no longer optional but essential for success.
City Plumbing is here to help and support all those in the trade get the job done while working within regulations. Take a further look at our website for further information on how we can help you stay compliant.

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