What Is The British Standard BS3632?

The current version is BS 3632:2023, and it's the reason modern Park Bungalows are warm, energy-efficient and comfortable enough to live in all year round.
If you're considering a Park Bungalow, this is the standard that guarantees your new home meets a strict set of quality and safety requirements.

If you're considering a Park Bungalow, this is the standard that guarantees your new home meets a strict set of quality and safety requirements.

BS3632 was first published in 1963 by the British Standards Institution (BSI), the UK body responsible for setting standards across a wide range of industries. Back then, the standard was relatively basic. Park Homes of that era were far simpler structures, and the specification reflected that.

Over the decades, the standard has been revised several times to keep pace with advances in building technology and changing expectations around what a permanent home should offer. The second edition came in 1970, followed by further updates in 1981, 1989, 1995 and 2005. Each revision raised the bar, but the biggest shift came in 2015.

BS 3632:2015 was a turning point. For the first time, the standard placed a strong emphasis on energy efficiency, bringing Park Home construction much closer to conventional housing standards. It introduced tighter requirements for thermal insulation, ventilation, on-site stability and minimum room sizes. The goal was clear: to make sure Park Homes weren't just liveable, but genuinely comfortable for permanent, year-round occupation.

It's worth going through the main areas that BS3632 addresses, because it's a far more detailed standard than most people realise.

• Structural integrity is the foundation. The standard sets out requirements for the supporting structure, external walls, floors and roof to make sure the home can withstand the weather conditions typical across the UK. Park Bungalows aren't lightweight temporary structures. They're engineered to be durable and long-lasting.
• Thermal insulation is one of the biggest areas. BS3632 specifies minimum U-values for floors, walls, roofs and windows. A U-value measures how quickly heat passes through a material, and lower is better.
• Ventilation is covered in detail. Good airflow prevents damp, reduces condensation and keeps indoor air quality high. The standard specifies how ventilation should be provided in every room, including kitchens, bathrooms and bedrooms.
• Fire safety is another major area. BS3632 sets requirements for smoke and heat alarms, means of escape and the fire resistance of materials used in construction. These requirements have been strengthened in each revision.
• Plumbing and electrical systems are also specified. The standard ensures that water, gas and electrical installations are safe, properly fitted and meet the performance levels expected for a permanent home.
• Sound insulation has been improved in the 2023 version, with better testing requirements to make sure walls meet the stated acoustic performance standards.

The latest version, BS 3632:2023, came into effect on 30 September 2023 and builds on everything the 2015 edition introduced. The focus this time is on pushing energy performance even further and addressing some practical issues that earlier versions didn't fully cover.

Here's what's different…

The U-Values

The U-values for floors, walls and roofs have been tightened, which means the external structure of the home has to retain heat more effectively. The roof U-value remains at 0.2 W/m²K, which was already the strongest part of the thermal envelope. In plain terms, that translates to a warmer home and lower energy bills.

Thermostatic radiator valves are now fitted as standard, giving residents more precise control over the temperature in each room.

To put that into numbers, wall U-values have dropped from 0.35 to 0.3 W/m²K and floor U-values from 0.35 to 0.26 W/m²K.

Ventilation

Every room now requires a permanently open trickle vent to improve air quality and reduce the risk of condensation. Wardrobe ventilation has been increased too, and the section on roof ventilation has been rewritten to cover a wider range of roof designs. On top of that, new vapour control measures have been added to manage moisture within the structure of the home, which is especially relevant as better insulation can sometimes trap moisture if it isn't properly managed.

Safety Improvements

Safety is part of the 2023 update as well. There's better guidance on steps, platforms and high-level bunk safety. Internal doors now have a minimum clear opening width. Smoke and heat alarm requirements have been upgraded. And, each home now carries serial number identification markings in at least three set places, making it easier to trace and verify.

Renewable Energy

The standard also acknowledges the growing role of renewable energy. It now includes provisions for alternative energy systems, including distributed energy setups that can supply multiple homes on a single site.

For anyone considering a move to a Park Bungalow, BS3632 is the standard that separates a residential home from a holiday unit. Holiday homes and lodges are typically built to a different standard called EN1647, which doesn't require the same levels of insulation, structural performance or year-round comfort.

A Park Bungalow built to BS3632 is designed for permanent living. It will be warmer in winter, cooler in summer and cheaper to run than a home that doesn't meet this specification. That matters for your monthly outgoings, your comfort and the long-term value of your property.

It also matters for peace of mind. When you know your home has been built to a standard that covers everything from the insulation in the walls to the safety of the electrical system, you can move in with confidence. You won't need to worry about whether corners have been cut during construction.

Every Regency Living home meets BS 3632 residential standards, which ensures exceptional comfort and durability. That commitment is reflected in the quality and energy efficiency of our Park Bungalows across all our developments.

One of the most practical benefits of BS3632 is its impact on energy costs. The standard's requirements for insulation, double glazing and efficient heating systems all work together to keep heat inside the home and reduce the energy needed to maintain a comfortable temperature.

Modern Park Bungalows built to BS 3632:2023 are single-storey homes with a smaller footprint than a traditional house. That means there's less space to heat in the first place. Combine that with the improved U-values, thermostatic radiator valves and better ventilation, and the result is genuinely lower energy bills compared to many older bricks-and-mortar properties.

This is especially relevant for people planning their retirement budget. Lower energy costs make it easier to predict your monthly outgoings and keep more of your money for the things that matter.

For a more detailed breakdown of what Park Bungalow living costs month to month, please visit our cost of living guide.

Is BS3632 a legal requirement?

BS3632 is a British Standard, not a law. However, most residential park operators require new homes on their sites to meet BS3632, and all NCC-member manufacturers build to this standard. In practice, it's the accepted minimum for any Park Home or Park Bungalow intended for permanent residential use.

Does BS3632 apply to older Park Homes?

The standard applies to new builds at the time of manufacture. Older Park Homes will have been built to whichever version of BS3632 was current when they were constructed. A home built in 2010, for example, would have met BS 3632:2005.

What's the difference between BS3632 and EN1647?

EN1647 is a European standard for holiday accommodation. Homes built to EN1647 have lower insulation, thinner walls and aren't designed for year-round living.
BS3632 is the residential standard, with significantly higher requirements for thermal performance, heating, ventilation and safety. If you're buying a Park Bungalow as your permanent home, it should always be built to BS3632.

Can I check whether a specific home meets BS3632?

Yes. Ask the manufacturer or developer for the Manufacturer's Declaration of Compliance certificate and the NCC badge. These documents confirm the home has been tested and inspected against the standard.

Will the standard change again?

Almost certainly. BSI reviews and updates standards periodically to reflect advances in technology and changes in building expectations. The gap between the 2015 and 2023 editions was eight years, but there's no fixed schedule for revisions.

For more answers to common questions about Park Bungalow living, please visit the Regency Living FAQs page.