Most of our doors can be trimmed to suit your existing casing.
Please check the product page for specific allowances. The reductions should be split equally from each edge, i.e. to reduce the door width by 12mm, remove 6mm from each side of the door.
We also offer a bespoke made to measure service on the majority of our doors - typically a higher cost and longer lead times, from signing off technical drawings to delivery. Please check the product page for more accurate information.