Changing a window into patio door

Hi, would I need a structural engineer if I’m changing a window into a patio door, but the door would be the same width as the window was so wouldn’t be altering the width or replacing the lintel etc.
Thank you

Asked by Izabela on 29th Sep 2025
Expert Trade Answers
"no you would not need a structural engineer or calcs for this as the proposed doors are not any wider than the window that is there now.
the existing lintel will be sufficient for this proposal

Mark at fairway window systems"
Answered on 29th Sep 2025 - Member since Dec 2024 - report
"No, you wouldn’t need a structural engineer to change it from patio doors to a window because you’re sticking to the same measurements"
Answered on 29th Sep 2025 - Member since Jul 2023 - report
"No you wouldn’t need a structural engineer as you are keeping to the same width as the original window."
Answered on 29th Sep 2025 - Member since Apr 2025 - report
"No as the same lintle would remain in place and the laod bearing wouldn't increase you'll be fine for a straight swap I've done 100s"
Answered on 29th Sep 2025 - Member since Apr 2025 - report
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