1. Elevation and aspect

Bats are highly sensitive to temperature, making the thermal characteristics of a roost critical to its success.

In line with BS 42021:2022, roost features should be positioned to provide suitable environmental conditions.

Best practice:

South and south-east facing elevations are typically preferred

Morning sunlight helps warm the roost

Avoid consistently shaded or north-facing elevations where possible

Providing a range of aspects across a development can help create varied microclimates and improve overall success.

 

2. Avoid artificial lighting

Artificial lighting can disrupt bat behaviour and deter roost use.

Guidance aligned with both BS 42021:2022 and the Bat Conservation Trust emphasises the importance of maintaining dark conditions around roost features.

Best practice:

• Avoid placing bat boxes near direct light sources
• Minimise light spill onto entrances
• Consider lighting design early in the project
• Maintaining dark, undisturbed elevations is key to effective habitat provision.

 

3. Proximity to suitable habitat

Understanding how bats use the surrounding environment is fundamental.

Bat boxes should be located:

• Close to foraging habitats such as woodland, hedgerows and water
• Along established flight routes
• Within connected green infrastructure

This improves accessibility and increases the likelihood of occupation.

 

4. Installation height and access

Height plays an important role in providing safe and suitable roosting locations.

Typical guidance:

• Install at least 4–6 metres above ground level
• Avoid areas of frequent disturbance, such as windows or openings
• Ensure a clear, unobstructed flight path to the entrance
• These principles help minimise disturbance and maximise suitability.

 

5. Integration within the building

BS 42021:2022 highlights the importance of integrating biodiversity features appropriately within the structure.

For integrated bat boxes:

• Position within quiet, low-disturbance elevations
• Avoid doors, windows and high-traffic areas
• Ensure stable internal conditions
• Commonly suitable locations include:
• Gable ends
• Upper elevations
• Areas away from regular human activity

6. Provide a range of roosting conditions

Best practice encourages providing a variety of roosting opportunities across a development.

This may include:

• Different orientations (warmer and cooler aspects)
• Multiple installation heights
• Distribution across the site
• This approach reflects natural roost variability and supports a wider range of species and behaviours.

 

7. Follow ecological recommendations

BS 42021:2022 places strong emphasis on site-specific assessment and professional ecological input.

Bat box placement should always be informed by:

• Ecological surveys
• Identified species and behaviour
• Project-specific mitigation or enhancement strategies

 

Planning and BNG considerations

Well-positioned bat boxes form part of a wider biodiversity enhancement strategy.

In accordance with BS 8683:2021, these features are recognised as enhancement measures outside the statutory biodiversity metric, contributing to the overall ecological value of a development.

The National Planning Policy Framework (NPPF) also requires developments to incorporate meaningful biodiversity improvements, making correct placement an important planning consideration.

 

Delivering effective outcomes on site

Integrated bat boxes, such as those within the Habibat range, are designed to:

• Fit standard masonry construction
• Be installed during the build process
• Provide long-term, maintenance-free habitat
• Early coordination between designers, ecologists and contractors ensures:
• Correct siting
• Efficient installation
• Successful ecological outcomes

 

Aligning with Bat Conservation Trust guidance

Guidance from the Bat Conservation Trust highlights the importance of locating bat boxes in positions that provide:

• Suitable thermal conditions
• Minimal disturbance
• Good access to foraging habitats
• Dark, unlit flight paths

Aligning with both BCT guidance and BS 42021:2022 ensures bat boxes are not only compliant, but genuinely effective.

 

A small detail that makes a big difference

When correctly located, bat boxes provide safe, long-term roosting opportunities and play an important role in supporting declining bat populations across the UK.



Thoughtful placement ensures these features deliver real ecological value, while supporting planning compliance and project success.