Welcome to John A O'Neill Building Contractors

Professional and experienced builders carrying out high standard new builds, house extensions,  damp proofing, renovations, refurbishments, conservations and more for customers throughout Doncaster and further afield.

Our services include design advice and project information / assistance for new builds, house extensions, renovations, refurbishments, damp proofing conservations and more...; we have in-house bricklayers, plasterers and joiners who are all City and Guilds or NVQ qualified. 

We are based in Thorne and cover a large area of Doncaster and the surrounding towns and villages. A full design and build package can be undertaken. Close working relationships with you, our client, are at the forefront of all our planning and operations. 

We are members of the Federation of Master Builders and we are also members of The Guild of Bricklayers. 

We are a family-run business who have been trading for over fifty years. Our expertise within the building industry is comprehensive and continually updated with new ideas and products on the market. 

Our involvement can be for as much or as little a project as is required, we have bricklayers, joiners and plasterers in house and can complete works from small refurbishments and house extensions to one-off spec new builds or the larger commercial projects such as school renovations and extensions, flood damage, damp proofing works and other insurance covered repairs. To view some of the work we've carried out for our customers in Doncaster, please visit our Gallery page, here.

So if you're based in Doncaster and you are looking for reliable and skilful builders, give us a call today on 01405 812 687 or 07860 913 544 and we will be happy to discuss your requirements.