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*The Angi rating for Home Building companies in Troy, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Home Building needs.

*The HomeAdvisor rating for Home Building companies in Troy, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Home Building needs.

Last update on November 24, 2025

Home Building questions, answered by experts

Local zoning laws and building codes will determine whether you can build a guest house in your backyard. These laws may limit the potential location of the guest house on your lot or the size and look of the structure. If your lot isn’t large enough, you may not be able to build a guest house at all. Speaking with a local home addition company can help you learn about the local regulations and your other options, such as adding an ADU onto the main house.

How long it takes to build an in-law suite will vary by type. The time it takes to build an addition will typically be less than for completely new construction. Expect to spend about two months if you convert a basement, attic, or other existing room in your home. New structures can take up to five months, plus up to two months to receive the required permits.

Yes, most general contractors require a down payment for project completion. A reasonable down payment for a contractor is 10% to 25% of the total project cost, though that will vary based on project size and location. The down payment helps cover the upfront costs of materials and permits and helps ensure payment for the project at hand. 

Home additions cost between $22,000 and $84,000, with the average addition totaling $51,000. Project costs can vary greatly depending on the type of addition and the required work to complete it. Homeowners can expect to pay between $80 and $210 per square foot for an addition. Conversions of existing space will sit toward the lower end of that range, while bump-outs and new construction add-ons will push toward the higher end.

This answer varies based on where you are, but most states require that all homes are greater than 320 square feet. Remember that four walls are not the only requirements—windows, closet space, minimal ceiling heights, and indoor air quality are also factors. Each state and municipality differs, though, and as some don’t consider tiny homes permanent shelters, you’ll need to check to ensure you aren’t violating any local or state laws with your build.

The Troy, NY homeowners’ guide to home building services

From average costs to expert advice, get all the answers you need to get your job done.

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