How do I bathroom / kitchen / extension? etc.

Not sure how important it is to you but where will the TV go in that lounge area? Can't tell scale but I imagine there's nowhere to wall mount with that glass on either side which means a corner unit - a bit 90s.

Of course, if you're not having a TV then ignore me.

I like the roof design..

Thats going to be lovely!
Wouldn't have the peak of the roofs in the centre make the whole extension feel a little bit higher with more headroom?

Nice! Are you dead set on the dormer being en suite? Could the door be on the landing to make it a stand alone shower room and toilet? IE two doors between someone night pooping etc.

Got a proposed location for a boiler and flue?

Hah - we used to live in Blenheim Park.

I like it - the double pitched roof is nice, is there a reason for it or just because?

Bench seating internal and external of the picture window could be nice (it’s what we’re doing) and might help with connection

How do those corner doors work - in summer will it be easy to get in and out and the house/decking feel connected?

Are there windows all along the side of the utility? Seems like a lot of nice light to be giving that space over the main living space

• it's cool
  
• be interesting to know how the rear extension roof(s) drain.
  
• I don't know what your objectives are for the top floor room, but it might be worth exploring exactly how much space remains in it once there is a king sized bed in it, and whether there are options for increasing the size. I'm slightly confused by the diagrams how the proposed design accommodates the chimneys - does it envelop them or not?
  

Nice, I like the matched slope of the roofs and that angle will give more of an open view while providing a bit more privacy for and from the neighbours.

In removing the chimney at lower ground only - how is proposed to support the rest of the above? Steel going across? Gallows brackets?