Project portfolio

Norton Lea Hospital


Tree Survey, Arboricultural Assessment, TPO approvals & Clerk of Works at Norton Lea Hospital


Tetra Tech / Integrated Health Projects

tree survey bs5837 lincolnshire hospital


Norton Lea Hospital is a disused site in Boston, Lincolnshire being redeveloped as a state-of-the-art mental Acute Inpatients Unit.

The site contains numerous high quality trees that include several protected by Tree Preservation Order. The most important tree on the site is a mature and characterful cork oak tree that is identified as a veteran tree on the Ancient Tree Inventory.

The redevelopment has included demolition and construction works close to protected mature trees. We have provided of expert arboricultural advice on these works close to sensitive trees, and monitored these works to ensure the trees thrive to enhance the new healthcare facility.

Read about the development here

How we helped

Enviroscope were commissioned to carry out a tree survey of the derelict site in 2021. The tree survey was carried out in accordance with BS5837:2012. The survey identified a number of high quality trees on the site, including some protected by TPO and a historic veteran tree. We worked closely with the demolition contractors and redevelopment design team to ensure that the constraints arising from the trees were allowed for at an early stage in the project.

We carried out an Arboricultural Impact Assessment of both the demolition and Construction phases, and produced Arboricultural Method Statements to allow the works to proceed with minimal impact on the protected trees.

It was identified at an early stage that the props supporting branches on the veteran cork oak tree had not been maintained and were unlikely to support the tree during vibration arising from the demolition of a nearby building. We specified a scheme to maintain the propos and supervised contractors carry out this work. At all stages, we have liaised constructively with the Council regarding trees protected by TPO.

The scheme has require regular monitoring and we have worked as an Arboricultural Clerk of Works. This has included monitoring of tree protection measures, and supervision of works close to the trees such as removal of foundations and ground investigation works for asbestos.

We lever the benefits of technology on all our projects. This ensures the data we collate and the reports and plans we provide are accurate, reliable and future proof, securing a long-term return on your investment in our tree services.

Do you need a tree survey?

Please contact us

First, we will listen to your tree concerns and discuss your requirements

Then, we will provide a written scope of works which is tailored to your needs plus a fee quote and timescales for the work

Following this, if you would like to proceed we will arrange the site work and get the project rolling!

We have carried out Tree Surveys and provided advice and assistance for a wide range of healthcare and other development schemes.

Read more about our Tree Surveys for a wide range of sectors in Case Studies

You can also take a look at our FAQs

What our clients say


Guy, you are a prince among men!
Thanks for taking time out to look at the tree and for your incredibly helpful advice!


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Bowcliffe Hall