i want to build a house in 49 square meter ground and upper floor. its 7x7

mujib - thistranslates to just under 23'

At 23 feet in each direction, I'll assume that you can build to "zero" and don't have any setback requirements. But that is the first thing to ask - are there requirements that the building sit off the property line a prescribed amount or can you build right to the line? Are you in an urban environment or do you want 1' outside so you can plant something green / screen between you and the street or alleyway? This one foot outside / planted in something vertical / columnar or with a metal laser cut privacy screen can make the entire house feel larger due to the light and green just outside . . worth it along the public street or alley.

Your walls will take around .15 meters from the interior space.

21.5' x 22.5' will give you a small but functional "open concept" space that you can have a kitchen, dining area and living space on the first floor . . but remember that around 4' wide needs to be used for stair and that is likely to take up to 8' long. If you carefully place the stair so it helps theflow upstairs also (maybe along the back wall of the shorter dimension?) (leaving 22.5 by 17.5 when you figure a traffic pattern) and use the understair area for kitchen storage elements.

You will want to utilize tricks like banquette seating in the dining corner so that is not taken up with space to pull chairs out. Imagine 14.5 x 17.5 is your living space to the right and the remaining 8 x 17.5 houses an 8 x 9.5 galley kitchen at back left (plus understair storage - run this into the under stair area) and the dining is in the front left with windows above that built in banquette seating around a table would feellarger than the actual 8 x 8 . . Do skylights over the stairwell so you have natural light coming down from above there. You can widen the stair to 5' and do a small powder room under the upper part of the stair if you need a guest restroom on the first level. Upstairs, in 23 x 18, how many bedrooms do you need? Two bedrooms with closets and a larger bathroom with good closet storage can be managed but three bedrooms start to be very small and I would advise you to go to three levels. Anotherstep that would make this feel larger, would be to go with taller ceilings on the first floor, and add a row of higher windows that afford privacy but bring natural light in. Ceiling at /not taller than 10' or 3 meters.

You can convert the rest back to meters. The entry door would come straight into your great room. A roof terrace might give you some outdoor space that is yours - very useful for practical maintenance of things that require fresh air / light. You could use juliet balconies on the second level with french doors or sliding doors so that when they are open, the room is the balcony. This also makes a room feel larger if there is a quiet space in any one direction.

If this is a house for one person, you could do the only bathroom upstairs, one large bedroom and a smaller study there. More skylights upstairs, and a 36" parapet on the roof for future private outdoor space.

I was given the measurements of 10 meters to build a row house. I think that this is only big enough for a tent!!! Am I correct in thinking this is too too small! Pamela