One of the first issues is the orientation of the house. Solar panels do better on the south side. You should research whether your roof needs to support more weight. You will also do well to consider all aspects of solar building --- you can find books available in e-format for this. Go to Amazon and read reviews carefully. Things like roof overhang, kinds of windows, etc, can make a big difference in cooling your house (I'm assuming in India, heating isn't a big issue). For the solar panels, what's available where you are is a starting point. I will note that in sunny countries, like Turkey and Tunisia, I see a lot of solar hot water on roofs, but not so many solar panels.

Costs really vary in different areas and they are always changing . You would be best to talk to 3 local contractors who have good reputations and ask them what their building costs are. When you say "interiors" do you mean furniture? Or the interior finishes? The contractors will be able to give you the interior finishes numbers, but you can talk to a few local interior designers for estimates on furnishing a house. Also, ask the contractors about landscaping costs. Do you want a pool or an outdoor patio? Or just planting? Plus the building permit costs in your area. Check with the local building department. Some areas charge school fees.............. It would be great if you could factor in an architect to help you pull all of this together. Also this should be an architect who has great references and is known for working within budgets. Once again, you should ask 2 or 3 for proposals to see how they price their services. It can vary.

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Hi Ashok, Leh being extreme cold region will need planning and structure a bit different than our regular home. Factors such as temperature all year round, the extent to which it has snowfall or maximum and minimum temperature drop, the topography of your proposed location, wind speed, these are among many factors that will play role in while planning of your ideal home. With advanced engineering methods and technology, we have many methods to build. Double wall will ensure enough warmth inside the house. -Thanks, -Neelam -Lines and Profile