What are the best home designs for a 23 feet x 12 feet plot?
you can please checkout from the available options
Find plans for ⇒ For Various Site Dimensions, even for small plots are planned at best. provided spacious plans & got maximum utilisation of space- Like 20 x 25 ft, 25 x 25 ft, 30 x 30 ft, 30 x 40 ft, 40 x 40 ft, 30 x 50 ft, 40 x 50 ft, also odd plots Dimensions

How can you make hidden areas in your home design? & how about different levels concept plans in modern house design?
Interesting thing is about floor designs, topically we are construct the house vertically as 0 to 10′ in height normally as Ground floor.
From 10′ to 20′ floor to roof height as 1st floor,
From 20′ to 30′ height as 2nd floor correct? But in recent in developments in our construction technology, rooms can be shuffling in vertically. Example: in corner of Living there will be a dining area, for this roof height 7′ is very much enough if we provide full stretch French window with glazing. Above this 7′ can start a upstairs may use for create a bed room or a duplex Family/living area of course vastu can be considered.

What are the requirements for a 1200 sq ft slab steel?
Slab & beams only need 1.2 kg per sft excluding columns, footing , plinth etc
Answer is average 1200kg to 1500 kg of steel required. It’s depends structural design/ soil bearing capacity (SBC)
Is there a web site where you can find a collection of excellent residential floor plans and elevations for single family homes and townhouses?
you can find the collection of excellent residential floor plans & elevations in this website

How much does a Architect/ Expert Civil engineer charge for the plan of a building? What are the rates? Does it vary according to the building and the locality?
Charge for a plan of a building cost you around Rs 18 per Square feet. cost is however depending on the total built area, further set of drawings, designs and number of revisions required to fulfil the needs. For affordable charges you may feel free to contact us.

How good a house design is? a 500 sq. ft. carpet area flat for 2 BHK House?
500sft is typically good dimension for 2 bhk flat.
2bed rooms of 12′x10′=240sft
Kitchen + balcony = 80sft
Living + Pooja/prayer = 130sft
Bathroom = 50sft
ie, Total round to 500sft is Fine

What is the difference between a traditional house built on foundation and a modern house that is built in column and beam?
1st case is load bearing structure- in this building is built so that wall will take entire load & passes the load

2nd case is Frame structure- in which wall won’t carry any load only columns & beams will passes the load & distribute to footing or foundation

Is there a book to learn the practical practices of building a house in India?
House plans choice is different from individuals & their plot dimensions available with respect to Road face.
However simply cost will be depending on how much area you want to build. Less area utilized means construction cost will also less
Article for learn the practical practices of building a house in India
Plan to Construction of house on your own? not familiar in build own? (Plan to Construction of house on your own? not familiar in build own?)
If you are looking for houses this article will help sure House Plans of a concept is mean everything while constructing a house (House Plans of a concept is mean everything while constructing a house) (House Plans of a concept is mean everything while constructing a house (House Plans of a concept is mean everything while constructing a house))