See Your Extension Before You Build: Free AI Visualiser Tool
What if you could see your extension before a single brick is laid? Our free AI-powered visualiser tool lets you upload a photo of your house and generate a realistic image showing what your extension, renovation or garden room could look like. No sign-up, no commitment — just upload, describe and visualise.
How the AI Visualiser Works
The process takes just a few minutes. First, upload a clear photo of your house — ideally taken from the garden or street showing the area where you want to extend. Then describe what you want: a single storey rear extension with bi-fold doors, a two-storey side extension, a loft dormer, a garden room — whatever you are considering. Our AI generates a realistic image showing your house with the extension added. You can then refine the result up to five times, asking for changes like adding a skylight, changing the roof style or adjusting the size.
What Photo Should I Use?
For the best results, take a photo of the side of your house where the extension will go. A rear garden photo works well for kitchen extensions and rear extensions. A street-facing photo suits side extensions and loft conversions. Use a landscape orientation, stand far enough back to capture the full elevation, and try to take the photo in daylight with even lighting. Avoid photos taken at extreme angles or in heavy shadow — the clearer the original image, the better the AI result.
What Can I Visualise?
The visualiser works for almost any type of home extension or external change. Popular uses include single and double storey rear extensions, side return extensions, kitchen-diner extensions with bi-fold doors, loft conversions with dormers, garden rooms and outbuildings, front porch additions, and full property renovations. You can describe specific features like roof lanterns, Juliet balconies, cladding materials, render finishes and window styles.
Tips for Getting the Best Results
To get the most realistic visualisation, be specific in your description. Instead of saying 'add an extension', describe the type, size and key features — for example, 'a single storey rear extension about 4 metres deep with bi-fold doors across the full width, a flat roof with a large skylight, and white render to match the existing house'. Mention materials, window styles and any architectural features you want. The more detail you provide, the closer the result will be to what you are imagining. If the first result is not quite right, use the refinement option to adjust specific elements.
How Accurate Is It?
The AI generates concept images — they show the style, scale and proportions of your proposed extension realistically enough to help you plan and share ideas with your family, architect or builder. They are not architectural drawings or planning documents. Think of them as a visual starting point that brings your ideas to life before you invest in formal design work. Many of our clients use the visualiser images during their initial consultation to show us exactly what they have in mind.
Using Visualisations to Plan Your Budget
Pairing the visualiser with our AI estimate generator is a powerful way to plan your project. Once you have a visualisation that shows the extension you want, use the estimate tool to get a rough budget for that type and size of project. This combination helps you understand both what your project will look like and what it is likely to cost — before you spend anything on architectural drawings or detailed design work. It is a practical first step that saves time and helps you make informed decisions early.
From Visualisation to Build: Typical Timeline
Use the visualiser to explore ideas (day 1). Get a rough budget using the AI estimate generator (day 1). Book a free consultation with MTD Build (within a week). If you proceed, the design and planning phase takes 6-16 weeks, then construction begins. A typical single storey extension takes 10-14 weeks on site. From first visualisation to moving into your new space, the full journey is usually 6-9 months.
Local Extensions Across Worcestershire
MTD Build works across Worcestershire, Herefordshire, Gloucestershire and Warwickshire — within 50 miles of our base near Worcester. Whether you have a Victorian terrace in Worcester, a detached home in Malvern, a cottage in Ledbury or a modern estate property in Bromsgrove, the visualiser can show you what an extension would look like on your specific house. Upload your photo and see the possibilities.
What to Do Next
Once you have a visualisation you like, you have several options. Use our AI estimate generator to get a rough budget for the project. Book a free consultation with MTD Build to discuss feasibility, planning requirements and next steps. Share the image with your family to get everyone aligned on the design. Or simply save it as a reference for when you are ready to move forward. There is no pressure and no obligation — the tool is there to help you explore your ideas.
Frequently Asked Questions
Is the AI extension visualiser free?
Yes, completely free. There is no charge, no sign-up and no obligation. You can generate a visualisation and refine it up to five times at no cost.
What photo do I need for the visualiser?
A clear, well-lit photo of the side of your house where the extension will go. Landscape orientation, taken in daylight, standing far enough back to capture the full elevation. Phone photos work perfectly.
How accurate are the AI-generated images?
The images are concept visualisations, not architectural plans. They show realistic proportions, style and scale to help you plan and communicate your ideas. They are not intended for planning applications or construction.
Can I refine the image after it is generated?
Yes. After seeing your initial result, you can request up to five refinements — for example, adding a skylight, changing the roof type, adjusting the size or switching materials.
Do I need to create an account?
No. You provide your name and email so we can send you a copy of the visualisation, but there is no account registration or login required.
How long does it take to generate an image?
The AI typically generates your visualisation in one to two minutes. Refinements take a similar amount of time.
Can I use it on my phone?
Yes. The visualiser works on all devices — desktop, tablet and mobile. You can take a photo on your phone and upload it directly.