Ashley Lewis Extensions & Renovations

Design & build for a seamless journey

How our extension and renovations work

Larger building projects such as home extensions and renovation will involve a host of skilled professionals and specialist craftsmen.

Every building project follows three key steps – Design, Specify and Build – and one of the first things you’ll need to do is to decide on your preferred way of making these steps happen. You have two main options. On the one hand, you can opt to take the traditional route, which will mean briefing an architect or design consultant to prepare plans – then inviting building contractors to bid for the work.

This way of buying is widely used in our industry and can work well. But if you already have plans, we will need to ensure the available information is sufficient by running them through our Project De-risking service, so you can have complete certainty on budget and quality. Alternatively, you can appoint a main contractor to take responsibility for all aspects of designing and building your project. This way of buying – most often referred to simply as Design & Build, has many advantages over the traditional approach.

With our own experienced team, our trusted specialist partners, and our network of hand-picked quality suppliers, we have access to all the skills and resources required to deliver your project in its entirety. Our commitment to Design & Build means that when you entrust us with your project, we will take responsibility for everything – from initial concept right the way through to completion.


Step one


To understand your vision and budget to determine how we can achieve your aims.

Step one

Step two

Survey & Proposal

An opportunity to evaluate your project, listen to your requirements, and agree the scope of any major changes and new structures.

Within 10 days we will present a costed proposal and a week after that we will follow up to answer any questions you may have.

Step two

Step three

References & Instruction

We will arrange for you to visit some of our previously completed projects to see our work first hand. Following this you can instruct us to proceed on a fixed cost basis.

Step three

Step four

Design & Specification

We will prepare designs and technical details to your brief, and will deal with permissions & regulations. We’ll then guide you through a detailed list of specifications for the finished project so you know exactly what you’re getting and we can maximise the speed of the build.

Step four

Step five


A well – planned build with regular progress reviews to minimise disruption and maximise speed.

Step five

Step six

review & completion

When your beautifully completed project is ready for you to review with us and sign off, we will present your guarantees, regulations certificates, and an information pack.

Step six


Our client communication and job management system is designed specifically to keep clients, project managers and tradespeople informed on every aspect of the project, so you, our office, and our site team are always on the same page.

Take a look at the short video below to see it in action.

5 Guarantees - 5 Years

Guaranteed: Fast Site Survey

We guarantee to offer you a visit to discuss your job take and take all the essential details within 10 days of your first call or email to us. If we don’t we’ll give you a £10 Amazon voucher.

Guaranteed: Fast Quote

We guarantee you will receive your proposal within 10 days of our site survey. If you don’t, your quote will include your choice of free bathroom underfloor heating or a free summer heating upgrade for your towel radiators, so your towels will be luxuriously warm all year round!

Guaranteed: Reliable

We guarantee your job will start on the agreed date and we will work continuously on your project. If we don’t, we will buy you a meal for two at one of the finest gastro-pubs in Oxfordshire!

Guaranteed: Clean & Tidy

We guarantee that the parts of your home we have been working on will be left clean & tidy. If they’re not, we’ll pay to have them professionally cleaned!

Guaranteed: All Work Guaranteed for up to 5 Years

Not only is all our work guaranteed for up to 5 years, but you can also benefit from insurance-backed warranties which are transferable should you sell your home! Which other installers are confident enough to offer this?

Naturally some terms and conditions apply. Please get in touch for further details.

Recent Projects

see what our customers are saying about us

Read more testimonials and the consistently high scores we’ve been receiving on Checkatrade.






Describe your Job; if you wish to give us a brief description of your project we may be able to give an outline figure to check against your expectations and budget:

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