Three storey Georgian red brick house with a walled front garden

East Sussex Architect Services

William Bates is a Chartered Architect providing architect services in the residential sector, with a portfolio that includes property renovations and new build houses ranging from small holiday bungalows to luxury villas and large one-off executive dwellings in the £1m plus bracket.

He also has extensive experience in the design of house extensions, conversions, alterations and refurbishment projects. These have covered properties from a variety of periods and styles, including a large number of listed buildings, as well as more unusual properties such as barns and oast houses.

Explore Our Main Services

Residential Architecture

New homes, extensions, conversions and renovations, designed around the way you live.

Commercial Architecture

Retail, commercial, leisure and public buildings, from first ideas to completion.

Expert Witness Reports

Independent expert reports on building disputes, particularly alleged professional negligence.

RIBA Chartered Architect with 40 years of experience in practice


RIBA Chartered Architect

Unlike many professional titles, "Architect" is protected by law: you must be registered with the Architects Registration Board (ARB) before practising as an architect, so you can have peace of mind that you are working with a qualified professional.

William Bates is a full Chartered member of the RIBA, which requires significant experience across different sectors and strict examinations. When you choose to work with Architect Heathfield, you receive a comprehensive and attentive service.

Our Architectural Services

Architect Heathfield is proud to specialise in the residential sector, having worked on projects of various scales across the South of England. We are also experienced in the design of commercial, retail and public buildings, including conversions and extensions of existing non-dwelling properties.

Whether you need planning drawings for a house extension or an initial consultation for a new build, we can help with design, planning applications, listed building consent, working drawings, realistic renderings and liaising with the local planning authority.

Call Now to Talk to a Chartered Architect

Architect Heathfield is a RIBA Chartered Practice based in Sussex. If you have a vision in mind for an extension or are looking to build a whole new property, call 01435 812973 to discuss it.

We will always endeavour to conduct a site visit as part of the initial consultation, which is generally free of charge for local projects.

RIBA Chartered Practice

Residential and commercial projects

Open, transparent costs

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Architectural services across Sussex, Kent, Surrey and London

Expert Witness Services

Disputes are surprisingly common within the construction industry, ranging from payment and boundary disputes to those over defects in a completed project. When a case is presented in court, there arises a need for expert witnesses.

William Bates specialises in claims involving professional negligence and payment disputes, with experience in all aspects of construction disputes, including party wall matters, across England and Wales. He is a member of the Chartered Institute of Arbitrators and appears on the RIBA list of architect expert witnesses.


Brick and white weatherboard extension to a house

From Design to Completion

Architect Heathfield can oversee every step of your construction project, from preliminary discussions and design to managing the building work, with open communication from the first day so you can take an active role.

Our design philosophy is simple: to focus on the needs of the client and improve the user's experience.

We understand that every project is a significant investment, so we work to keep construction on programme and within budget, and we are entirely transparent about costs.

Architect Heathfield is the RIBA Chartered Practice of William Bates, based in Horam, Heathfield, East Sussex. We design new build houses, extensions, renovations, conversions, listed building projects and commercial properties across Sussex, Kent, Surrey and London, and William Bates also acts as an architect expert witness.