Understanding M4(1), M4(2) and M4(3)
Understanding M4(1), M4(2) and M4(3)
What Accessibility Standards Really Mean for New Homes
With the government’s plan to build 1.5 million new homes, around 10% will be designed for accessible living, a huge step forward in inclusive housing, and an equally big opportunity to get accessibility right from the start.
But if you’ve ever looked at building regulations, you’ll know how confusing they can be. The terms M4(1), M4(2) and M4(3) are often thrown around in planning documents and design briefs — but what do they actually mean?
Let’s break them down clearly.
What Is Part M of the Building Regulations?
Part M of the Building Regulations in England covers “Access to and Use of Buildings.”
It ensures that new buildings, and certain major alterations, are designed to be accessible and usable by as many people as possible, including wheelchair users, elderly residents, and people with limited mobility.
Within Part M, there are three key levels of accessibility for new homes: M4(1), M4(2) and M4(3).
M4(1) – Visitable Dwellings
Minimum standard for all new homes.
These homes are designed to be visitable by most people, including those with limited mobility.
That means features like:
- Step-free access to the main entrance.
- Wider doors and corridors for easier movement.
- A ground-floor WC that’s usable by a visitor with mobility needs.
- Step-free access throughout the home.
- Slightly larger bathrooms and bedrooms.
- Strong walls capable of supporting grab rails.
- Space for a potential future through-floor lift or stairlift.
- Larger circulation spaces in every room.
- Accessible kitchens and bathrooms.
- Step-free access inside and outside the home.
- Turning circles for wheelchairs in key rooms.
- Space for carers and hoists if needed.
- Easier planning approval.
- Reduced retrofit costs later.
- A stronger reputation for inclusive design.
- Choose the right solutions for M4(1), M4(2) or M4(3) compliance.
- Design spaces that are both functional and beautiful.
- Future-proof your projects with trusted, cost-effective systems made to last.
