We offer a joined-up service that ensures the strategic and day-to-day management of client properties is seamless. Our Asset Management team will advise on rent reviews, lease renewals, rating appeals, building surveys, access, valuations and other property related issues.

key contacts

John Hepworth T: 0151 242 3060
M: 07770 855802
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John Hepworth MRICS
Liverpool Office
Services: Asset Management, Landlord & Tenant

John is a Director of the practice and Head of the Asset Management Department.

Having qualified in 1986,John is primarily involved within the Landlord and Tenant discipline, providing lease renewal and rent review advice to both landlords and tenants relating to a variety of different property types, but with a particular emphasis on large retail properties used for food and non-food retail use in both in-town and out-of-town locations.

He is directly responsible for all aspects of the Asset Management service and also involved in providing proactive property management advice relating to a variety of developments throughout the country.

John is an RICS Registered Valuer.

Mark Williams T: 0151 242 3076
M: 07798 582 127
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Mark Williams BSc(Hons), MRICS
Liverpool Office
Services: Asset Management

Mark qualified as a Chartered Surveyor in 2000, joining Mason Owen in 2003.  Now a Director, Mark is directly responsible for overseeing and coordinating the Mason Owen managed portfolio.  Part of this role includes the identification and nurturing of new and existing clients.  


With over 17 years of experience, Mark has specialised in Property Asset Management, advising retained landlord clients on all aspects of property management.  Mark has advised various clients in the set-up of management procedures and service charges on various commercial assets, which has included a full advisory role in the establishment of management systems, including the service charge accounts. 


Mark has an in depth knowledge of all asset classes from shopping centre developments to high street retail shops, and provides ongoing advice to retained landlord clients to include rent reviews and lease renewals, together with lease re-gears, to ensure that all assets meet their full potential.

Dilys Hooper T: 0151 242 3099
M: 07887 693116
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Dilys Hooper
Liverpool office
Services: Property Management Accounts

Dilys a senior partner at Mason Owen, who heads up the property management accounts team. Part of her role is to ensure that all Client monies are dealt with in accordance with the RICS rules and regulations.

With over 27 years experience in her field, 17 of which at Mason Owen. Dilys was involved in the initial set up, implementation and accountability of the rental income, turnover rents and service charge for the Meadowhall Shopping Centre in Sheffield, in addition to advising on such matters for the Centro Shopping Centre in Oberhausen, Germany.

Specialising in service charges, she carried out independent audits on behalf of Clients to ensure lease compliance and accuracy.

Dilys has worked closely with property management software companies in advising them on the development of their specialist property software, and was responsible for the implementation of the Tramps system at Mason Owen in 2007.

Alan McCabrey T: 0151 242 3092
M: 07786 171405
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Alan McCabrey BSc MRICS
Liverpool office
Services: Asset Management

Alan joined Mason Owen in 2002 having previously been employed as an Asset Management Surveyor by Co-operative Insurance Society.

He qualified as a Chartered Surveyor in 1992 and is a Partner in the firm.

Alan has extensive experience of managing all types of commercial property, including shopping centres, multi tenanted office buildings and mixed-use schemes.

He currently advises a number of property company, private and charitable sector clients on the management of their property portfolios both in the North West and on a wider national basis.

David McCallum T: 0151 242 3093
M: 07798 576795
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David McCallum BLE, MRICS
Liverpool Office
Services: Asset Management

David joined Mason Owen in 1994 and qualified as a Chartered Surveyor in 1997.

He is an Associate Partner of the Practice and provides advice for a number of clients, primarily on retail premises, which include multi- tenanted properties in both town centres and retail parks. He also has experience of dealing with mixed-use retail/office buildings as well as retail/residential neighbourhood shopping centres.

Since joining he has dealt with the management of properties throughout England & Wales – from the North West region to Devon and the South coast

James Leonard T: 0151 242 3097
M: 07768 746 071
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James Leonard BSc(Hons) MRICS
Services: Asset Management, Landlord & Tenant

James joined Mason Owen in May 2001 and qualified as a Chartered Surveyor in April 2002.

James is an Associate Partner within the Asset Management Department, advising clients on all aspects of property management and in particular manages the Kirkby Shopping Centre where Mason Owen have been instructed to act as Managing Agents by Tesco Stores Limited since April 2008.

James also has experience dealing with mixed use schemes together with carrying out rent reviews, lease renewals and associated professional works.

Sarah Bancroft T: 0151 242 3071
M: 07799 765 254
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Sarah Bancroft BSc(Hons) MRICS
Services: Asset Management


Sarah joined Mason Owen in 2008 as a graduate from Liverpool John Moores University, and qualified as a Chartered Surveyor in April 2011.


Responsible for a wide-ranging property portfolio including: retail units and parades, shopping centres and multi-let office blocks in Merseyside & Cheshire, Lancashire and Cumbria, Sarah advises a number of retained clients on all aspects of Property Asset Management in order to maximise the return on their investment.

Sarah has experience in dealing with service charges, as well as landlord and tenant issues including the negotiation and settlement of lease renewals and rent reviews.


Callum McDougall T: 0151 242 3159
M: 07769 157 646
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Callum McDougall BSc(Hons)
Services: Asset Management

Callum joined Mason Owen in June 2014 as a Graduate Surveyor in the Asset Management Department after graduating from Liverpool John Moores University in 2014 with a First Class Honours Degree in Real Estate Management and Business. He is currently assisting colleagues with a variety of professional work including site inspections, rent collection and lease management. 

Callum is commencing his Assessment of Professional Competence Programme with the aim of qualifying as a member of the Royal Institute of Chartered Surveyors.

Charlie Clutton T: 0151 242 3094
M: 07557 769 848
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Charlie Clutton BSc(Hons)
Services: Asset Management

Charlie joined Mason Owen in September 2014, having completed his degree in Real Estate Management and Business at Liverpool John Moores University graduating with Upper Second Class Honours.
As a Graduate Surveyor within Mason Owen’s Asset Management Department he is currently assisting senior Surveyors with portfolio management, including aspects such as lease management, rental collection, site inspection and service charge delivery.     
Charlie is working towards his Assessment of Professional Competence programme with the intention of qualifying as a member of the Royal Institute of Chartered Surveyors. 

Stuart Markland T: 0151 242 3096
M: 07798 576 801
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Stuart Markland DipNEBOSH Grad IOSH AaPS
Services: Health & Safety, Asbestos Surveys

Stuart joined Mason Owen in 1994 and worked in property management until taking on the role of Health & Safety Officer in 2001. Stuart works closely with the Asset Management surveyors to ensure managed properties are fully compliant.

As a graduate member of IOSH and having obtained a NEBOSH diploma, Stuart advises clients in relation to Health & Safety matters relating to their investments and undertakes Risk Assessments and Fire Risk Assessments. Stuart also undertakes Asbestos Surveys on properties and can help to produce  Asbestos Management Plans.

Stuart is an Associate of the Association for Project Safety.


Cor Rentier T: 0151 242 3069
M: 07876 193 821
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Cor Rentier MSc
Services: Asset Management



Mike Long T: 0151 242 3021
M: 07774 893 490
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Mike Long BSc MRICS
Services: Asset Management

Mike retired in May 2014, having worked at Mason Owen for 30 years.

Mike is currently retained as a part time consultant to ensure a smooth transition during handover.