I think you kinda have to move the kitchen. Firstly an extra bedroom can’t go in the side extension as it’s not wide enough - and if you put it in the rear extension then there is a concern that you will get to it though the lounge. I like the kitchen being through the lounge as it means you can have a kitchen roof lantern and the lounge will borrow some light too. As far as the logistics of moving the kitchen- firstly you were going to have the new space built so the plumbing and electrics can be included with the build. Secondly if you take an existing kitchen and put it in a bigger room it won’t fit. At the very least you may have to buy new worktops. A brand new kitchen might challenge the budget but there are bargains to be had on used kitchen specialist websites.

Hi Melanie, Anne and Jonathan’s ideas both look great. If you go ahead with a loft conversion you could probably add a dormer extension without needing planning permission. This would add usable space with sufficient head height, and also add a great feature window to make the most of natural light and views. It looks like you would have space to add a full-size staircase above the existing one to provide access, which is preferable to a fixed ladder or space-saving stairs! From experience, I have found the biggest issue in loft conversions is the existing structure which should be considered carefully. As the floors may need to be reinforced with new timbers and even steels, and if there are any braces or trusses these may need to be removed to create a usable space but other supports may be needed to compensate. Here is a quick design that I came up with for a ground floor redesign. It’s smaller than both of the others but integrates the whole garage into the inside space. (This might not be suitable for you but i thought it was an interesting idea that you might not have thought of, and you have other great options to choose from!) So the living room is attached to the dining area, with the fireplace made double fronted. the back wall is opened up in 2 places into a kitchen all the way across the back righthand side. This has a fully glazed roof on the left to bring in as much natural light to the kitchen and living spaces, and a set of standard rooflights over the worktops area. The study becomes a utility with some space given over to a shower added to the WC. And the existing kitchen becomes a new larger study/downstairs bedroom. Here is the sort of dormer you might be able to add to maximise usable space Please let me know what you think. I have another to swap the kitchen and dining area from this version. And I wish you all the best with your project!! Phill

One option

Given the orientation of your plot, I'd suggest the proposed footprint is wrong. If you lose the single storey part and instead extend beyond your double storey extension with a single storey you create a southerly aspect. Single storey further than 4m is unlikely to worry planning - my 7m passed without comment. It's two storey bits where 4m matters. If you extend like that, how about kitchen where your architect put dining, and add a utility beside where the loo is shown - juggle it about a bit if you can to use the existing doorway and either access the loo via the utility or have a small inner hall with access to both.