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About Us

Janus Conservation Ltd is a specialist historic building surveying and heritage planning consultancy, with offices in Thame, Oxfordshire and Bloomsbury, London.

We deal exclusively with the historic environment, working with both commercial and private/residential clients along with major landowners such as the National Trust and Royal Household. We are both RICS Regulated and an IHBC recognised Historic Environment Service Provider. 

We pride ourselves on providing meaningful and pragmatic advice with an industry-leading customer experience.     

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Our Team

rupert1

Rupert Hilton

Director
Historic Building Surveyor & Heritage Consultant

Ruth Mitchell

Ruth Mitchell

Senior Historic Building Surveyor

Oliver Sharpin - Photo - Thumbnail Square

Oliver Sharpin

Historic Building Surveyor & Heritage Planning Consultant

Elsa Sibley

Elsa Sibley​

Historic Building Surveyor

Millie Totman​

Millie Totman​

Graduate Heritage Consultant​

Claire

Claire Lambert​

Accounts Manager

The Climate Change

The Climate Pledge

In August 2021, Janus Conservation joined a group of highly influential organisations by signing up to The Climate Pledge and committing to reaching net-zero carbon emissions by 2040. Committing to the Pledge further reinforces Janus Conservation’s wide-ranging focus on sustainability.

Fill out the form below to speak with a heritage professional today.

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© 2022 Janus Conservation Ltd

Janus Conservation Ltd Registered office address:
The Sanderum Centre
30A Upper High Street
Thame, Oxfordshire
OX9 3EX

Company number: 12336058
VAT number: 338898435

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Rupert Hilton

Rupert Hilton

Director

  • RICS Conservation Accredited Building Surveyor
  • CIOB Conservation Certified Specialist
  • MScCHE, BA(Hons), IHBC, MCIOB

Rupert is an accomplished historic building surveyor, construction manager and heritage consultant, and one of only a handful of practitioners in the UK to hold full conservation accreditations with the Royal Institution of Chartered Surveyors (RICS), the Chartered Institute of Building (CIOB) and the Institute of Historic Building Conservation (IHBC). In addition, he is now seeking to become a full member of the Institute of Conservation (ICON) – illustrating his passion for the historic environment.

Having previously worked for a number of very well-respected companies, Rupert quickly established himself as one of the most versatile, qualified and capable conservation practitioners in the country, before founding Janus Conservation in January 2020.

He currently acts as a quinquennial inspector to numerous historic churches, including being named surveyor of the fabric to Nicholas Hawksmoor’s iconic grade I listed Christ Church, Spitalfields in 2022.

Rupert is now particularly interested in ‘retrofit’, making responsible and technically compatible improvements to the energy efficiency of historic buildings, and is a qualified Retrofit Designer for Pathway C (High-Risk Schemes) under PAS 2035.

Ruth Mitchell

Ruth Mitchell

Senior Historic Building Surveyor

  • MRCS
  • RICS Conservation Accredited 
  • IHBC 
  • BSc

Ruth’s fascination with the built environment blossomed early, leading her to pursue a building surveying degree at Robert Gordon University in Aberdeen, where she championed the idea of marrying modern advancements with time-tested building conservation practices.

After graduating in 2012, she embarked on a path that enriched her with diverse experiences, working on offshore construction projects before honing her skills in historic building conservation while working for several esteemed companies, including holding the position of Senior Building Surveyor for the National Trust.

Ruth is highly qualified being both a Royal Institution of Chartered Surveyors (RICS) chartered and conservation accredited building surveyor, along with being fully accredited by the Institute of Historic Building Conservation (IHBC)

Her dedication to the profession has been further recognised by being invited to join the RICS Conservation Steering Group and being shortlisted for the prestigious RICS Matrics Building Surveyor of the Year award in July 2023. 

Oliver Sharpin

Oliver Sharpin

Heritage Consultant

  • MSc, BA(Hons), IHBC

Oliver has nurtured a deep passion for history from an early age, which led him to pursue a Bachelor’s degree in History from the University of Portsmouth. Building on this foundation, he further specialised by earning an MSc in Historic Building Conservation in 2018.

Since joining Janus Conservation in September 2020, Oliver has developed a strong expertise in the inspection and analysis of historic structures. He is proficient in conducting complex building assessments, producing detailed Heritage Statements, and preparing Impact Assessments for preservation and restoration projects.

Oliver’s commitment to the field is underscored by his status as a full member of the Institute of Historic Building Conservation (IHBC), further demonstrating his dedication to maintaining and protecting our architectural heritage.

Elsa Sibley

Elsa Sibley

Historic Building Surveyor

Elsa is a dedicated and driven professional with a strong passion for integrating conservation and the built environment. Her fascination with historic buildings from a young age inspired her to pursue a career in surveying. She earned a first-class honours BSc in Real Estate from the University of Westminster in 2024.

With an academic background and four years of experience as a rotational apprentice surveyor in real estate, Elsa possesses a robust foundation in property. Her expertise allows her to adeptly manage technical aspects while also considering public engagement and human factors.

In addition to her academic and professional pursuits, Elsa is committed to community involvement, actively volunteering with organisations such as IntoUniversity.

Currently, Elsa is progressing towards becoming a Chartered Building Surveyor with the Royal Institution of Chartered Surveyors and an Associate with the Institute of Historic Building Conservation.

Millie Totman

Millie Totman

Graduate Heritage Consultant

Millie joined Janus Conservation after completing her MSc in Historic Building Conservation at Kingston University London, where she gained a thorough understanding of legislation, architectural history, and the inspection of historic buildings. Her passion for heritage is matched by her ability to approach challenges both creatively and analytically.

Millie brings strong skills in research, organisation, and communication, honed during her academic studies and professional experience. With a background in History (BA Hons, University of Nottingham, First Class), she has a particular interest in archival research and gender politics in historical contexts.

She has volunteered with organisations like the Turn End Trust, where she supported the open day of a Grade II* listed site, engaging with visitors and trustees alike. Millie’s enthusiasm for architecture, art, and culture is reflected in her keen interest in travel, photography, and conservation work.

Millie is proficient in a range of tools, including Vectorworks, Photoshop, and Office 365, and has practical experience in event support, data management, and public engagement. Her proactive attitude and attention to detail make her a valuable member of the Janus Conservation team, contributing to the protection and celebration of the UK’s heritage.

Claire Lambert​

Claire Lambert

Accounts Manager

  • BSc (Hons), Cert Acct (Open)

With a background in practice management and finance, Claire joined the Janus team in early 2022.  She holds a Professional Certificate in Accounting plus a bachelor’s degree in Psychology with a special interest in Organizational Psychology.

Claire works closely with other Janus team members in order to deliver an efficient, friendly and customer-focussed accounts service.