The amazing thing is that you have the luxury of approaching the architect about these issues. Laminated glass should address the security along with any alarm or security system you plan on installing, though the laminated glass may have size limitations. Regarding the waterproofing you should contact the architect, contactor and waterproofing subcontractor, or see about hiring an independent waterproofing specialist who can detail and warranty the condition. As a design consideration, make the lower area a garden or gallery or sculpture area and upper should be all glass. Maybe a garden roof there too if accessible or visible. In any case looks like an amazing place!!

Warlike Tiger, Good Morning. Whats your dilemma. Is it the budget, design plan or availability of a professional to do it? Either of that would require a site study, without that it is not possible to estimate the plans or costs or even a realistic design plan. If you are keen , you can search for professionals in this forum and contact them or leave your number for interested architects to call you. However, this idea of building the second story and then breaking the lower floor walls is not feasible. It is a hilly area and you should be all the more cautious with the foundation. Hope this helps! Amit CORNERSTONE DESIGNS Bangalore.

Nishant, Ideally, you should have electrical and plumbing lines ready before construction. Interior design, you may have the mood board discussed with your designer. The detailed plans can be developed in the construction phase or later as well. Planning is the key to a successful home building and should be the first task. People do take a 'will deal with it' approach in construction but that often is costly and more time consuming. Thanks, Nitin Cornerstone Designs, Bangalore.

Jeco, Price variations do often confuse a home owners. Going a bit off topic, often we have to politely say no to clients who are looking for a fixed cost on day 1. The design evolves over a period. Pricing is extremely sensitive to location and materials selected. For example there are materials that would start from 60 sft to 1000 sft which can be used for this external construction. Unless that material is specified it is difficult to pindown the price. Having said that it should be in the range of 2-5 lakhs in Bangalore. This idea definitely looks good but have you considered that this is a terrace sit out and design and the requirements of porch are completely different. For example you may not want rain water to fall on the cars underneath ? Thanks, Nitin Cornerstone Designs, Bangalore.