W J Shirley provides the full lifecycle of drainage services from pre-acquisition consultancy through to remedial work and asset management. Our services are designed for commercial relevance in modern market conditions and are available nationwide.

We value our longstanding client relationships with many of the UK's leading Building Consultancies, Investors and Fund Managers.

Tel. 0207 100 1930

Transactional Drainage Consultancy

Pre-acquisitions Assessments, Vendors’ Packs, Multi-site Investment Portfolios, Environmental Risk Assessments, Consultancy.

CCTV Inspections

Project Work, Refurbishments, Route Tracing, Asset Management, Problem solving, Crawler units, Investigations

Maintenance & Repairs

High Pressure Water Jetting, De-silting, Root cutting, Lining, Patch lining, Excavation & renewal, New drainage systems

Please get in touch to chat through any drainage related issues.

Get in Touch

What our customers say

Why choose us?

A different kind of drainage company

We know there is a choice when choosing a drainage company, that’s why at WJ Shirley we have built our business around the specific needs of Building Consultancies, Investors and Fund Managers. With over 55 years experience of specialising in transactional drainage assessments, we understand the complex ways in which drainage liabilities can reduce capital value and interrupt investment cash flows. Our clients value the importance of fast turnaround and reporting timescales and clear, informed and relevant advice.


For Building Consultancies

Our business is built around the specific needs of Building Consultancies, Investors and Fund Managers.

Nationwide service

Our services are available nationwide at short notice which means we can handle multi-site investment portfolio acquisitions.

You're in Good Company

WJ Shirley are the choice of many of the UK’s top Building Consultancies & Investors.


We have specialised in transactional drainage inspections since 1960 and improved every aspect of it along the way.

Independent Advice

We always work for the benefit of the client and only recommend spending money when there is a clear cost benefit to do so.

Clear Reporting Format

Receive easy to understand reports with recommendations based on commercial relevance.

A business you can trust

You benefit from over 85 years of experience and the personal service and accountability of a family-run business.

Creating Value

We do not always offer the cheapest quote but do aim to provide the best value for money. Value comes from what we can ultimately save for the client. See example…

A message from the Director

Rob Shirley

"My aim is for WJ Shirley to be recognised by the UK's top Building Consultancies and Investors as providing the highest quality impartial drainage consultancy and contracting services."

Our Projects

These are our latest projects

£250,000 hidden liabilities


£500,000 Drainage Liabilities


£113,000 saved on second opinion


£50,000 drainage installation


£ Drainage defects identified this year

Building Consultancy Clients

Sites inspected this year

Years specialising in Transactional Drainage Assessments