2 Storey Extension & Loft Conversion

"Onslow Construction and their team completed a large 2 storey side extension, which included a loft renovation and loft extension. We are really pleased with the results inside and out. John went above and beyond to find a perfect match to the existing bricks and to keep us informed of the progress. It was a pleasure to have Onslow Construction and their team at our house to do all the work, which is now a lovely home for our family. We would highly recommend Onslow Construction.  Many thanks."

Rear Extension, Utility Room & Amenities

"We are absolutely thrilled with the large rear kitchen and day room extension John and the team completed on our house in Guildford. They really understood what we wanted and went above and beyond to ensure that all the work was completed on time and to an extremely high standard. On a personal note, we genuinely enjoyed having Onslow Construction working in our home. We cannot recommend them highly enough and without any reservations."

2 and 1 Storey Extension & Refurbishment

"The guys at Onslow Construction completed our 2 storey extension which gave us an amazing kitchen diner, utility, extra bedroom and bathroom. It has completely transformed our house. They were an absolute pleasure to work with, keeping to the time schedule and budget set at the start and the communication was great throughout. Even at the end when there were a few snagging points, they were brilliant at ensuring everything was completed. We would totally recommend them and would definitely use them again if we wanted any further work doing!"

Rolls Royce Motor Cars

"Some estates offer the perfect grounds, some the ideal facilities, but seldom the two meet. While working at Rolls-Royce Motor Cars, I required a venue that echoed the brand’s exquisite craftmanship, a place where serenity and elegance spoke out to you the moment you cross the threshold. This is when I discovered ‘Mansion House’. The attention to detail in this property was like nothing I had seen before, every inch of the property meticulously considered and curated. The craftsmanship and fine finishes were second-to-none. It could be no more fitting of a brand such as Rolls Royce. An astonishing project and unique achievement in every way."

2 Storey Extension & Full Refurbishment

"Onslow Construction and team did an amazing job refurbishing and extending our house. The whole house needed wiring, plumbing, plastering and a new roof. They built a two-storey extension, with a great brick colour match, and a single storey extension to the rear of the house. We are very happy with the end result. Everyone was friendly, approachable and worked to a very high standard. We would definitely recommend Onslow Construction."

2 Storey Extension & Double Garage

"I have known John as a builder for more than 15 years and during that time he has carried out numerous works on my house, including chimney breast removal, adding a front porch extension and building a double brick garage. Most recently Onslow Construction completed a kitchen rebuild and first floor extension project for me. Onslow Construction utilises a team of skilled trades specialists, such as electricians and plumbers. In every case the work carried out was to an excellent standard. They are hard-working builders who are caring and considerate of their clients wishes and needs from beginning to end. I have no hesitation in recommending Onslow Construction."

Rear and Side Extensions & External Works

"John and his team completed a kitchen diner and utility room extension for us. The job was completed to a high standard from start to finish and the communication was great throughout the build, even answering calls and sorting out any issues out of hours. I would not hesitate to recommend Onslow Construction to anyone looking for improvements to their property."

Articles Referencing Mansion House

"The scale of this project is hard to contextualise, with each detail reifying the authenticity of the work to such an extent that it’s hard to believe the building is that new — and I mean that in a good way.
– Eli Ankutse – Joshua Magazine

Recently restored in the most sympathetic, painstaking and spot-on manner imaginable. It is now one of my top two favourite interiors of all time – …[they] achieved something quite special.
– Aurora Eastwood – Pololine"

J Dobinson Structural Detailing Services

"During the last few years my association with the Onslow Construction team has been a very positive experience.

I have provided Onslow Construction with structural drawings and calculations for a wide range of projects, for clients who have engaged John and his work force to construct their extension and renovation projects.

I believe Onslow Construction will prepare a very organised phase of work and quality of construction to match the Building Control approved construction drawings."