Build a two story with a garage under the top story. It will have to be long and narrow lot is not wide. 4 bedrm s will be tight, looks like you only have rm for about 1200 sq ft incl garage. Or you could put front door on side behind garage and stairs inside to go up to bedrooms and bath rooms. Have a small bathroom downstairs. With living area and kitchen, with dining area.

Start with a simple pencil sketch of the lot with the home floor plan. Compile photos of rooms that you like using an Ideabook here on Houzz to share with design professionals. Research architects to find a good match to fit your needs. Architects have the incite to help you select the construction professional that should also be a good match. Plan, plan and then plan more! Changes during construction are usually costly. Hope this helps! ClearLED.biz

Mohammad. I understand your program. You may be lost in the details at the moment. Please do follow and trust the advice given here by all these people. You are about to embark on a reasonably expensive journey. Get professional help with someone who you can sit down at a table and brainstorm with them your ideas and intentions. There are Architects and there are professional building designers who are members of the American Institute of Building Design (AIBD) who are well versed in projects such as yours. I personally love a design challenge. After 38 years designing homes and special use buildings I enjoy this type of challenge the most. I am in Ohio and may not be close to where you are but I am sure with a little investigation you will find the best design professional for you.

I think it totally depends on two things, 1 The available space 2 Your religious belief. Someone who is very religious may try to squeeze a separate space even in tiny flat, while someone who is not overtly religious may just have a small corner with Idols in spite of being in a position to have a separate room.