Tag Archives: ADU

Can’t Afford a Backyard Guesthouse? Think Again

Can’t Afford a Backyard Guesthouse? 

Who wouldn’t want a backyard guesthouse and the endless possibilities it offers? You could use your guesthouse to host friends from out of town or house parents or in-laws. You could earn some extra income by renting out your guesthouse on Homeaway or Airbnb, or you could use it as your very own sanctuary for a relaxing staycation.

Unfortunately, many homeowners convince themselves that the cost of building a guesthouse on their property is too steep to justify the project, no matter how much they would enjoy the additional living space. However, price doesn’t have to be an obstacle when you use a pole building house kit to construct your beautiful pole barn guesthouse.

What is a Pole Building and How Can It Become a Guesthouse?

Pole buildings are cost-effective, easy-to-install permanent structures. As the name suggests, poles play a significant role in the design: pressure-treated timber columns are embedded in the ground to support primary structural frames. The walls and roof of the building are supported and connected with purlins, girts, and sheathing. This is a building style that has its roots in agricultural communities. You may have seen pole barns before! More recently, this affordable, customizable, and versatile structure has become increasingly popular for primary homes, seasonal cabins, hobby buildings, and guesthouses.

While the standard pole building can have a somewhat industrial look, your pole building can be designed with your preferred aesthetic in mind, whether you’re looking for a rustic back garden cottage or a modern, minimalist detached studio. When you order from Hansen Pole Buildings, you can get a custom pole house building kit with each component designed to meet safety, space, and style needs.

Adding a Pole Building Guesthouse

Before you decide to add a pole building guesthouse, you will, of course, need to check your city’s zoning and property laws. Building codes vary from place to place, but in most cities, you will need a building permit to add a new standalone structure to your property.

Once you’ve obtained the proper permitting, the actual construction process is relatively straightforward. Because residential pole barns come in prefabricated kits with detailed instructions, it’s not even necessary to hire a construction crew—many ambitious DIYers choose to construct their own pole barn guesthouses.

With your pole building completed, it’s up to you to decide how you want to use it. Maybe you’ll decide to host more visitors—or to set aside the space for your own work or relaxation. There’s no wrong way to use a pole building guesthouse.

ADU’s, Best Insulation, and a Post Frame Home

This week the Pole Barn Guru answers reader questions about building an attached ADU (additional dwelling unit) with a shared wall, the Guru’s thoughts on the best option to insulate a space, and whether specific design choices are possible in a post frame home.

DEAR POLE BARN GURU: We are planning to build a shop with an attached ADU (additional dwelling unit) for my mother to live in. Can the ADU with a monolithic slab share a wall with a pole-barn, that will also have a slab floor? CARL in SHERIDAN

DEAR CARL: Certainly can. Unless the shop is no more than 1000 square feet, you will have to have no less than a one-hour fire separation between them. This can easily be accomplished with each side of wall having 5/8″ Type X gypsum wallboard applied. Both shop and ADU can and should be post frame (pole barn) constructed.

 

DEAR POLE BARN GURU: My concerns are best insulation since this is a metal exterior, attic insulation blown in cellulose, will have drywall in house, attached garage metal flat ceiling, vapor barrier above metal ceiling? Thanks. VICTOR in CHRISMAN

DEAR VICTOR: I think you will find a general consensus as to closed cell spray foam applied directly to steel roofing and siding as being “the best”. In my humble opinion, it is most effective in Climate Zones 3 and under when entire building shell is being encapsulated by it. It also comes with a very pricey initial investment.

With this said, your requirements where you are (Climate Zone 4) are for R-49 in ceilings, R-20 in walls.

If this was my own building, this is what I would do:

Walls (from out-to-in): Steel siding; Omnidirectional Housewrap meeting ASTM E2273 drainage efficiency requirements; Commercial bookshelf girts; R-30 Rockwool Comfort batts; Wel lsealed interior vapor barrier.

Ceiling: Raised heel trusses to allow full depth of insulation from wall-to-wall; Integral Condensation Control factory applied to roof steel; vent eaves and ridge in proper proportion; blow in R-60 fiberglass or granulated Rockwool directly above your ceiling finish. I am not a fan of cellulose over a steel ceiling as chemicals in it (if it gets damp at all) will react with steel to prematurely deteriorate it.

 

DEAR POLE BARN GURU: My wife and I are looking at post-frame for our next house and we don’t need a full second story, so we’re considering a loft/one-and-a-half story setup because we also want traditional gabled dormers. We really like the looks of cottage style architecture and want a roof that is somewhere in the ballpark of 9/12 or 10/12, but want to take advantage of the cost savings that post-frame. It’s my understanding from reading other posts that the minimum eave height for two story post-frame houses with 8ft ceilings is ~19ft. What would the minimum eave height for a loft/one-and-a-half story be, and about how much would doing this (for the purposes of adding functional dormers) inflate the cost of a similar size building? NIK in CLEVELAND

DEAR NIK: Post frame construction will prove to be your most economical permanent structure, so you have made an excellent choice. With your preferred roof slope, it is possible you might be able to have an eave height a low as 10 feet, if you want an eight foot high finished ceiling below. One of our Building Designers will be reaching out to you to further discuss your wants and needs and can work with you to create a firm budget.

 

 

Engineer Drawings, Build on a Basement, and an ADU

This week the Pole Barn Guru addresses reader questions about engineering drawings for a house– from a building inspector in Michigan, whether or not a post frame structure can be mounted on a basement, and if an ADU (accessory dwelling unit) can be constructed with post frame.

DEAR POLE BARN GURU: I am looking for engineering drawings for a pole structure that will be used for a house. This would include foundation drawings, and all other drawings that show that it conforms to the international building standards. All load calculations would be needed. stamped engineering drawings would be required. I am a building inspector for Williams township, Michigan. LESLIE in AUBURN

DEAR LESLIE: Thank you for your interest. Every post frame building Hansen Pole Buildings provides is fully engineered to meet applicable structural portions of the International Residential and/or Building Codes, as applicable. All components and connections, including foundations, are checked and verified for structural adequacy. Besides full-sized (24″ x 36″), site specific, multi-page engineer sealed plans showing each piece and how it is attached, you also receive engineer sealed verifying calculations.

With each building investment comes our 500+ page step-by-step Construction Manual and unlimited technical support provided by team members who have actually constructed post frame buildings.

A member of our Building Design team will be reaching out to you to further discuss your post frame building needs.

 

DEAR POLE BARN GURU: Can a pole barn home be mounted on a basement? I assume there is no floor so how does one put a floor over a basement in pole barn home? Another question, if the barn is not finished inside, does it really cost less to have a finished house to move into? GWYN in CLINTON

DEAR GLYN: Post frame (pole barn) homes can easily be engineered to ICC ESR approved wet-set bracket mount to poured concrete, CMU (concrete masonry unit) blocks, ICF (Insulated Concrete Form) blocks or integrated into permanent wood foundations.

For extended reading on wet-set brackets https://www.hansenpolebuildings.com/2019/05/sturdi-wall-plus-concrete-brackets/
Floors over basements are no different structurally than stick-built homes and can be either beams and joists, or engineered wood floor trusses. https://www.hansenpolebuildings.com/2020/01/floor-trusses-for-barndominiums/
While much of post-frame’s cost savings are due to foundation savings, fully engineered post frame buildings are very material efficient and DIY friendly (not to mention less costly to super insulate). This makes post-frame an ideal design solution for cost conscious future homeowners.

 

DEAR POLE BARN GURU: Can a pole barn be used to create a backyard ADU (accessory dwelling unit)? My city allows them with rules and specifically said hoped to use modular to decrease construction noise but it seems that this might be a similar decrease in noise. However the issue is size I need it to be 400 which is the current minimum my house is 700 so my backyard is around 40×60. I would actually prefer a two story which could then have a smaller footprint perhaps 250-300 sq ft on each level with a simple porch lift between with an exterior staircase as back up and fire escape, or a two car garage with the ADU as the second floor. The ADU would become my home as I need a wheelchair accessible space. thank you. KRISTINE in GRAND RAPIDS

DEAR KRISTINE: Yes, a fully engineered post frame (pole barn) building would likely be an ideal design solution for an ADU. Our experienced American floor plans specialists can assist with a design to best meet with your needs.

For more information: https://www.hansenpolebuildings.com/post-frame-floor-plans/