You list is all "stone" products. Stone products are natural. The durability is guaranteed with stone. Stain resistant...remove marble and granite from your list. Both can stain and etch and both will do this with "flooring" more than they will with a counter top. Gloss levels all change...but it will take years to do it. All stones have maintenance = homeowner needs to work at keeping stone looking good. Stone = expensive. There is no "benefit" for "reasonable" when working with stone. They all cost plenty of money. Stone is expensive. No way around it. If you want "glossy" that doesn't stain for a "good price" then you have forgotten to mention the BEST option: porcelain tiles. Porcelain will do everything you want for a lower price. Stone is expensive, it can stain (especially "oil" stains) it will "etch" or lose gloss level with certain liquids (acid based liquids will do this) and they all need to be maintained and eventually need repolishing to maintain "gloss". Durable is all you can expect out of stone. The rest of your wish list belongs with porcelain tiles.

Hi Rajesh, Construction cost varies on basis of site location, layout plan, number of a slab, on basis of what kind of materials you'll be using. -Thanks, -Neelam -Lines and Profile

It’s is back painted glass. As a back splash it can be used as it’s easy to clean and maintain. Highly recommended to be toughened. The entire back needs to be cladded in waterproof plywood and then the glass is stuck on to it with special adhesive or silicon gel. Any reservations on using plywood then you can opt for WPC ( wood plastic composite ) which is alternative to play and is totally termite-water proof.

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.