Hi, my husband and I and our two small children live in a small 1970s 3-bed mid-terrace house. It has a standard layout: you walk in through the front door and the stairs go up immediately in front of you. Turn right into the living room which narrows to make an L-shape - the dining area is at the back of the L-shape with a door to the garden. To the right of the dining area is the kitchen which is 10'8 x 6'10. The garden is just under 40 feet long, so not huge but good enough for our purposes.
Upstairs is a small family bathroom, two double bedrooms and a box room. The total internal floor area is 883 square feet (I am not sure if this includes the shed or not - am going on the property details from when we bought it).
I would like to put a wall between the dining area and living room, and knock down the wall between the dining area and the kitchen. If we did just this, we'd have a living room of 14'2 x 13'8 and a kitchen/diner of 10'8 x 16'4. But I'd also like to put a single-storey extension on the back of another six feet, as wide as the house. So this would make the kitchen/diner 16'8 x 16'4. It might be possible to squeeze in a utility/loo under the stairs if it was this size - there's currently no way of adding a downstairs loo as our front garden, which is a good size, goes diagonally from the house. So we can't add a porch with a loo in as others have done on our street who have straight gardens.
DH isn't keen on my extension plan as he doesn't want to make our garden too small. It would be small, but I don't think it would affect the way we use it - we'd still have room for a nice patio and chairs and table, the wendy house and mud kitchen, and the shed, as well as a patch of lawn.
What I am worried about is that our kitchen would be 270 square feet in a house that would be just under 1000 square feet. So it would be nearly a third of the total floor space. Do you think this would feel disproportionate? I'd really love bifold doors and to be able to have parties and Christmasses and get everybody round the table and have a big family space in our otherwise modest little house.
But I'm also worried that it wouldn't add all that much value. I'm wondering if just doing the smaller job (making a 10'8 x 16'4 kitchen diner) would be a lot cheaper and add a similar amount of value to the house if we put in a good quality kitchen etc.
I know it's hard without seeing the house/knowing the area, but any thoughts?