Room Addition Cost Estimates – DIY Home Additions

By Mark J. Donovan

First and foremost, the homeowner needs to come up with the room addition cost estimate him or herself. And to do this he or she has to generate/obtain the room addition build plans, calculate the bill of material costs, and find, interview and hire all of the subcontractors. Then they need to schedule and manage the daily workings of a large team home construction project. So think twice before deciding to be your own general contractor on your room addition project. Now with all this said, Ill focus the rest of this article on estimating room addition costs.

This effort takes time and money, both in the design and construction of the room addition. Consequently home construction contractors charge a premium when providing a room addition cost estimate.Room addition cost estimates can vary dramatically due to a number of factors, chief amongst them being what is specified in the room addition plans. For example, room addition costs estimates of $80 to $130 per square foot for a basic family room addition is common.

If the room addition includes bathrooms and/or a kitchen, the room addition costs can easily escalate to $200-250 per square foot. So for example, if your room addition plans specify the construction of 400 square feet of family room living space, without any type of bathroom or kitchen area, you can expect to pay $32,000 $52,000 for a completed addition. If, on the other hand you are including a bathroom and/or kitchen, you could see room addition cost estimates as high as $100,000.

The contractor is in business to make money, and his time and effort is money, so you need to expect some premium charge for the materials that he orders and has delivered to your room addition project.When obtaining room addition cost estimates make sure your contractor provides you with a comprehensive construction bid that includes a checklist of all the tasks to be performed, the material to be used, and a detailed schedule of when the work will be performed.

The key to obtaining accurate room addition cost estimates is to have a complete set of room addition plans and specifications.

The more thorough your plan, the less likely for unwanted cost overrun surprises. By having a complete set of room addition plans, you can price out every single building material item, even down to the curtain rod. By including this level of specification you can avoid including TBDs and contractor allowances in the room addition cost estimates. TBDs and contractor allowances are the third rails of home addition projects as they inevitably lead to higher than anticipated room addition costs.

For more help on building a home addition, see HomeAdditionPlus.coms Home Addition Bid Sheets. Our Home Addition Bid Sheets provide you with the knowledge and information on how to plan a home addition project, and what to look for when hiring contractors. They also include detailed cost breakdown tables and spreadsheets for estimating your own new home addition building costs.

Fill out our 3-5 minute quick and easy form, and receive a free price quoteon a house addition from one of our prescreened and licensed home addition contractors. This process is free and there is no obligation to continue once you receive your house addition price estimate.

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Room Addition Cost Estimates - DIY Home Additions