20 years experience in construction
Expert Planning and warrant support
One person keeps things moving
House extension design starts with understanding how you live now and what your home is missing. We help you shape that next step at John Allan Architectural Design in Bathgate, creating professionally designed extensions that give you more usable space without losing the character of your property. A larger kitchen, an open-plan kitchen and dining area, an extra bedroom, a home office, or a better family room can all change how your home works day to day. We begin with a detailed measured survey of your existing house and the space around it, so early ideas are based on what can genuinely be achieved. From there, we develop concept options and refine them with you until the layout feels right for your needs, your budget, and the way you want rooms to connect. With more than 20 years of construction industry experience across West Lothian and Central Scotland, we design extensions that look good on paper and make sense when it comes time to build.
A design process that helps you picture the result
Our drawings are shaped around flow, practicality, and the way the new extension links with your current layout, because extra square footage only matters if it improves everyday living. Single storey additions, rear extensions, side extensions, and larger alterations each bring different design challenges, and we work through those carefully from the start. 3D images and virtual tours are available for a small additional fee, giving you a clearer feel for scale, light, and room connections before any work begins. When consent is needed, we handle planning permission applications and prepare building warrant applications with the technical drawings required for submission. We also coordinate with structural engineers and other specialists where a project calls for their input, while keeping our design service clear and joined up.
What you can expect from our service
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Detailed measured home survey
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Concept options refined with you
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Designs shaped to your budget
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3D visuals available on request
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Planning permission support included
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Building warrant technical drawings
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Completion certificate application help
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Single point of contact from John Allan Architectural Design
More than extra space on the back of the house
Your extension should feel like part of your home, not a bolt-on that solves one problem and creates three more. We think carefully about daylight, circulation, furniture space, and how each area will be used once the new layout is in place. If you also want to rework older rooms as part of the same project, John Allan Architectural Design can guide you towards our architectural renovation design service for that side of the brief. If you're weighing up other ways to gain space in Bathgate, our garage conversion design service may also be worth comparing before you decide.
Frequently Asked Questions
What does a house extension designer do before plans are drawn?
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We start with a measured survey of your existing home and the available space around it. That gives us accurate information to develop concept designs that suit your layout, budget, and the type of extension you're considering.
Can you help with planning permission for a house extension?
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Yes, we can prepare and submit planning permission applications where consent is required. We also handle building warrant applications and technical drawings, so you have support through the approval stage as well as the design stage.
How can you see what the extension will look like before work starts?
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We can provide 3D images and virtual tours for a small additional fee. These visuals help you understand room flow, scale, and how the new extension connects with the rest of your home before construction begins.