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information prior to purchasing land and drawing plans. Once you feel the official is engaged and at least somewhat encouraging, ask if they could help by supplying the answers to a list of specific zoning questions. Assuming the answer is yes, complete a copy of the survey form on the facing page.

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      Once you have found town and code officials receptive to at least the concept of a tiny house, you need to find your spot. Sticking only to totally legal possibilities, they are:

       an already approved development specifically for tiny houses

       a building site meeting all zoning requirements

       an existing residential property which could host an ADU (see page 7).

      Once you have acquired your legal site, the next step is to design and draw up plans for your tiny house on that site. You might get away with hand-drawn sketches in a few sparsely populated rural areas, but the approval process—not to mention the construction process—will be much easier if the plans are drawn to standard architectural conventions and scales (see Chapter 6).

      Of course detailed architectural plans include such things as:

       sizes of floor joists and roof rafters

       stairway dimensions

       minimum clearances for doorways, halls, and plumbing fixtures

       locations and ratings of electrical receptacles

      All of these are regulated by building codes, which we address next.

      Local building codes are usually based on the International Residential Code (IRC). Both states and local jurisdictions are free to modify the IRC, but until a local code enforcement official states otherwise, consider the IRC your bible.

      How do you make sure your tiny house design meets the Code? Here are the possible ways:

       Have it built by a tiny home manufacturer (expensive, but the simplest way).

       Have it designed by a local architect (adds 10–15% to the project cost).

       Follow this book’s directions, then pay to have your plans reviewed by an architect.

       Provided your local code enforcement officer really likes you, follow the directions in this book, meeting often with him or her to guide your progress.

       Permits and Variances

      Before building you will have to obtain permits. In a small town the permits may be issued by a single code enforcement officer. In heavily populated cities and towns you or your builder will have to present your plans to the planning board for approval. Often you will need to resubmit your plans after making changes requested by the board members.

      Sometimes the board will turn down your application because it fails to meet a fundamental zoning requirement. In the case of a tiny home, this will most likely be size. If the planning board refuses to grant your application a variance, your final option would be an appearance at the separate zoning board of appeals. If determined to prevail you should at this point consider hiring a real estate attorney to help you present your case.

       The IRC Minimum Size

      With the exception of IRC Appendix Q, any tiny house (no larger than 400 sq.ft. habitable area) has to conform to the same IRC requirements as any other one- and two-family dwelling. Since size is of such critical importance, it bears listing the IRC main body regulations regarding size:

      R304.1 Minimum area. Habitable rooms shall have a floor area of not less than 70 square feet.

      R304.2 Minimum dimensions. Habitable rooms shall be not less than 7 feet in any horizontal dimension.

      Exception: Kitchens.

      R304.3 Height effect on room area. Portions of a room with a sloping ceiling measuring less than 5 feet or a furred ceiling measuring less than 7 feet from the finished floor to the finished ceiling shall not be considered as contributing to the minimum required habitable area for that room.

      R306.1 Toilet facilities. Every dwelling unit shall be provided with a water closet, lavatory, and a bathtub or shower.

      R306.2 Kitchen. Each dwelling unit shall be provided with a kitchen area, and every kitchen area shall be provided with a sink.

      NOTE: The minimum area of a bathroom containing the three fixtures listed in R306.1 and conforming to the minimum fixture clearances shown on page 35 is 18 square feet.

      Since R306.2 refers to a kitchen area, not a separate kitchen, the kitchen may be part of the minimum habitable room of R304.1. Thus the minimum total area of a dwelling can be as little as 70 + 18 = 88 square feet!

       The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.

       User note:

       About this appendix: Appendix Q relaxes various requirements in the body of the code as they apply to houses that are 400 square feet in area or less. Attention is specifically paid to features such as compact stairs, including stair handrails and headroom, ladders, reduced ceiling heights in lofts and guard and emergency escape and rescue opening requirements at lofts.

      GENERAL

      AQ101.1 Scope. This appendix shall be applicable to tiny houses used as single dwelling units. Tiny houses shall comply with this code except as otherwise stated in this appendix.

      DEFINITIONS

      AQ102.1 General. The following words and terms shall, for the purposes of this appendix, have the meanings shown herein. Refer to Chapter 2 of this Code for general definitions.

      EGRESS ROOF ACCESS WINDOW. A skylight or roof window designed and installed to satisfy the emergency escape and rescue opening requirements of Section R310.2.

      LANDING PLATFORM. A landing provided as the top step of a stairway accessing a loft.

      LOFT. A floor level located more than 30 inches above the main floor, open to the main floor on one or more sides with a ceiling height of less than 6 feet 8 inches and used as a living or sleeping space.

      TINY HOUSE. A dwelling that is 400 square feet or less in floor area excluding lofts.

      CEILING HEIGHT

      AQ103.1 Minimum ceiling height. Habitable space and hallways in tiny houses shall have a ceiling height of not less than 6 feet 8 inches. Bathrooms, toilet rooms and kitchens shall have a ceiling height of not less than 6 feet 4 inches. Obstructions including, but not limited to, beams, girders, ducts and lighting, shall not extend below these minimum ceiling

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