But while the difficulties of single life may be intractable, the challenge of determining the age of prehistoric artifacts and fossils is greatly aided by measuring certain ra Love-hungry teenagers and archaeologists agree: dating is hard. But while the difficulties of single life may be intractable, the challenge of determining the age of prehistoric artifacts and fossils is greatly aided by measuring certain ra
1. Decide on the square footage of the room you will be adding to your home. Room additions can cost up to 50 percent higher, between $80 and $130 per square foot before considering wiring and plumbing, than that same room had been constructed with the rest of the house, according to the Home Addition Plus website.oom additions can cost up to 50 percent higher, between $80 and $130 per square foot before considering wiring and plumbing, than that same room had been constructed with the rest of the house, according to the Home Addition Plus website.
Shares & Saves. Save. When calculating the cost of adding an additional room to your house, a lot depends on what the space will be used for. A 10x12 kitchen or bathroom will be more expensive than a similarly-sized living space in the home as the price of fixtures and appliances tends to drive prices up.nywhere you build in the country, expect the labor costs for hiring a general contractor to be about the same as the materials expense. In other words, you could half the average cost to add a 10x12 room to your house by simply doing the labor yourself, reducing the estimate from $11,400 to about $5,700.