New Forest Cottage Roof Remediation Safeguards Soprano Pipistrelle Maternity Roost

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Water & EcologyWater & Ecology

Industry

Real Estate Development

Location

United Kingdom

ECOSA was appointed to undertake an ecological assessment of a New Forest property undergoing remediation works when a soprano pipistrelle maternity roost was discovered.

Challenge

A local client identified that remediation works were required for the roof of a cottage located in the New Forest and ECOSA, a Trinity Consultants team, was appointed to undertake an Ecological Impact Assessment of the site to support a planning application for this work. During the Preliminary Ecological Appraisal survey, the cottage showed signs of being highly suitable for roosting bats, with bat droppings recorded around possible access/egress points on the roof. Bat droppings were sent to a lab for DNA analysis and were found to belong to soprano pipistrelle Pipistrellus pygmaeus.

All bat species are designated as European Protected Species and are protected under the Conservation of Habitats and Species Regulations 2017 meaning it is an offence to deliberately kill, injure, disturb or capture bats and damage or destroy their breeding sites and resting places. It is also an offence under the Wildlife and Countryside Act 1981 to intentionally or recklessly disturb bats while they occupy a structure or place used for shelter or protection or obstruct access to a place of shelter or protection. Therefore, bat surveys were necessary to determine the nature of the bat roost present, and the potential impacts of any works undertaken.

 

Solutions

ECOSA completed three targeted bat surveys to confirm roost status and numbers, then guided the client through securing a European Protected Species Mitigation (EPSM) license from Natural England. The team demonstrated the legal need, lack of alternatives, and detailed compensation measures. Works were scheduled for October — outside maternity and hibernation seasons — under direct supervision of a licensed bat ecologist. Once investigative roof works revealed more repairs were needed, ECOSA managed a new planning application and worked with the client and authorities to agree on a modified roof design using the original tiles where possible and installing specially adapted bat tiles. This ensured the bats could continue to use the cottage while meeting the updated license conditions. Despite tight deadlines and complex approvals, the EPSM license was modified in time for safe completion before the May maternity season.

 

Services Performed

The team conducted a Preliminary Ecological Appraisal with DNA confirmation of bat species, followed by three surveys to assess population and roost status. They managed the EPSM license application and modifications with Natural England, designed a mitigation strategy for roost protection, and supervised roof investigation works. Their efforts also supported planning consent with the New Forest National Park Authority.

Results

The investigative works revealed the need to improve the cottage roof through the addition of insulation and minor alterations to the roof structure. A new full planning consent was required from the New Forest National Park authority for this additional work with consent granted in January 2023.

Due to the new consent and the change in the nature of the proposals, the granted EPSM licence needed modification. A suitable mitigation strategy for the cottage was devised with the client to reinstate the original roof tiles where possible and to install modified bat roof tiles to give the bats continued use of the building. This strategy was agreed by Natural England and the EPSM modification was approved in March 2023, with sufficient time for the roof to be reinstated for the start of the bat maternity season in May 2023. Despite restricted timescales and significant administrative burden due to the nature of the works and the presence of the maternity roost, close liaison between ECOSA, the client, the New Forest National Park Authority and Natural England ensured all tasks were undertaken in compliance with planning policy and legislation to achieve the best outcome for both the client and the soprano pipistrelle maternity colony.

 

250

Soprano pipistrelles protected

3

Detailed bat surveys conducted

ESPM

License secured and modified in time