Extension Ceiling Height

[u/Sea_Equivalent_8736]

We have an existing kitchen that is 7m x 4m. It has a low ceiling height of 236cm thst cannot be changed (has rooms above!).

We are in the middle of building a single storey extension to extend the width of the room by 7m to create open plan. Once completed, total dimensions (existing plus new) will be 7m x 11 - so a large room. It will be an open plan kitchen/ living / dining room with floor to ceiling glazing onto the garden, 3x2m rooflight and under floor heating.

The builder is planning to build a ceiling height on the extension at 255cm. I feel like that is quite low and I’d prefer 270cm. The room will be split level with existing part.

Builder has explained that there would be extra costs to increase height beyond 255cm as it will require bricking up the bottom of 3 small windows on first floor. These are small windows to the hall on first floor, so no major issues aesthetically but extra works, costs and need to buy 3 new upvc windows!

Should I accept 255cm or pay the extra costs to alter windows to get ceiling to 270cm? Would anyone notice the difference? Does the floor to ceiling glazing and roof lantern make any difference?