Interior Design Layout Planning for Approved Extension Plans
Pre-Build Interior Design & Space Planning for Extensions and Renovations
Renovating your home or about to build an extension?
Planning approved?
Before you pour concrete or move a single wall… let’s make sure the layout actually works.
Designer by your Side
from £995.00 (Based on a single room or space. Larger extensions or multiple areas are priced accordingly.)
If you're planning an extension or renovation and already have architectural drawings or planning approval, this is the ideal moment to refine how the space will actually work before construction begins.
Architectural plans focus primarily on the structure of the building, but they don’t always fully consider how the space will function once furnished and lived in.
Our Pre-Build Interior Design & Space Planning for Extensions and Renovations service helps homeowners explore the best possible layout before building starts — ensuring rooms flow naturally, furniture fits comfortably and the space works beautifully in everyday life.
Already have architectural drawings?
We can help you visualise how the space will actually work before construction begins.
Because this service is based on reviewing drawings and creating interior layouts, we offer it across the UK, although many of our projects are naturally local to Epsom and Surrey.
"If you are going round in circles and need a professional opinion on what will and won't work in your house we would highly recommend Jan and Fusion Interior Design."
What This Service Includes
How the Designer by Your Side Service Works
Using your architectural drawings as a starting point, we develop clear layout proposals and visual concepts to help you understand how your space could function before construction begins.
Making these decisions before construction begins can help prevent expensive changes later in the build.
Our aim is to ensure that when building work starts, the layout has already been carefully considered.
This may include:
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Reviewing your architectural floor plans
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Creating 2–3 alternative layout options
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Producing 2D layout plans showing furniture placement
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Producing 3D visual concepts to help visualise the space
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Checking door and window placements
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Considering lighting positions and switch locations
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Identifying potential layout issues early
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Ensuring furniture sizes and circulation space work realistically
We can help with:
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Reviewing and interpreting architectural floor plans and layouts
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Suggesting layout improvements for better space planning and flow
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Maximising storage opportunities
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Making sure your home works for real life — not just on paper
It’s ideal for:
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Homeowners renovating their home or planning an extension
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Those who have started their renovation but feel overwhelmed by decisions
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People in pre-build or renovation stage that want reassurance
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Clients who want to get it right the first time—saving time, money, and stress
from £995.00
If you’re focusing on specific rooms—whether it’s a stylish new living area, a luxury bedroom, or you need your kitchen or bathroom plans checked over then our range of services provides design ideas and recommendations for furniture, lighting, and finishes.
From our initial consultation, we’ll help you decide how to make the most of your design hours, based on your priorities and schedule.
