The Shed Dormer for a New Look

Get a Shed Dormer for More Light and a Whole New Look

The Shed Dormer adds substantial daylight into your shed, making the inside feel larger and giving the outside a quaint appearance. The package comes standard with a 7/12 pitch roof and includes three 10x29in horizontal windows. It is only available in 8ft, 10ft and 12ft widths, but you can add dormers to the 2nd side or to longer buildings.


  • Standard with a 7/12 pitch roof
  • Three 10in x 29in horizontal windows
  • Treated buildings have 81in inside walls
  • Painted/Urethane buildings have 82.5in inside walls


  • Available sizes depend on location
  • Available only on Utility Sheds
  • Only available on 8ft, 10ft and 12ft widths and only and 81 inch inside wall height

Contact us for more info and a quote today!


The Gable Dormer - Provides Extra Detail

Get a Shed Dormer for More Light and a Whole New Look

The Gable Dormer provides an architectural detail on your existing roof that transforms your storage space into an attractive landscape feature. One 18in octagonal window helps let in more light.

More than one dormer can be added to a building if the building length permits. You can also add dormers to both sides of the gable-style roof.

A roof dormer can give additional attic space, and be a part of the exterior wall, giving you more curb appeal and a whole new roof plane.


  • One 18in octagonal dormer window
  • Treated buildings have 92in inside walls
  • Painted / Urethane buildings have 93.5in inside walls


  • Up to 10ft maximum gable width
  • Available sizes depend on the location
  • Available only on Utility Sheds

Shed Dormer Info and FAQ’S

What is a Dormer?

A dormer is a structural element of a building that protrudes from the plane of a sloping roof surface. It’s usually used to create additional headroom and floor space within the building and to add windows for light and ventilation.

There are several types of dormers including:

  1. Gable dormers: This type of dormer has a simple pitched roof of two sloping planes, supported by a frame that rises vertically to form a triangular section below the roofline, i.e. a gable. It’s the most common type of dormer.
  2. Shed dormers: This type has a single flat planed roof that slopes in the same direction as the main roof but at a shallower angle.  These dormers also generally have dormer windows underneath the dormer roof.  The dormer style will vary and the roofing material will depend on what you already have.
  3. Hipped dormers: These have a hipped roof with three sloping planes that meet at the top.
  4. Flat roof dormers: As the name implies, these dormers have a flat roof.
  5. Eyebrow or eyelid dormers: This type has a curved roof and no sides, the roof being carried over to the line of the external wall.

Dormers can be an effective way to add space to a home, particularly in the case of attics and loft conversions.

What is the Difference Between a Gable and a Shed Dormer?

A gable dormer and a shed dormer are two types of dormers that protrude from the roof of a house to provide more space and allow for windows, but they have different architectural designs.

  1. Gable Dormer: A gable dormer (also known as a doghouse dormer due to its shape) has a gable roof structure on top of it. The roof consists of two sloping planes that meet at the top, forming a triangular section beneath the roofline. The gable dormer is often chosen for its traditional and charming appearance.
  2. Shed Dormer: A shed dormer has a single, flat planed roof that slopes in the same direction as the main roof but at a shallower angle. This design often provides more space for headroom and windows than a gable dormer of the same base width. The simple, box-like structure of a shed dormer gives it a more modern look.

In terms of practical differences, choosing between a gable and shed dormer often comes down to the amount of space you want to add, the aesthetic you prefer, and the architectural style of your house. Shed dormers tend to offer more additional space than gable dormers but may not always blend seamlessly with traditional architectural styles.

Are Shed Dormers Expensive?

Typically no, shed dormers are not expensive.

The cost of adding a shed dormer to your home depends on a number of factors, including the size of the dormer, the complexity of the construction, the materials used, the labour rates in your area, and whether you’re adding it to an existing structure or including it in new construction.

The cost of adding a dormer generally ranges from $2,500 to $20,000 or more. Shed dormers, due to their larger size and the increased amount of interior finishing work (like drywall, paint, and flooring), could be on the higher end of that scale.

It will also depend on the window that you choose and how big that window is, and what kind of window it is.  When it comes to the gable type of dormer these dormers are generally less expensive because there is less involved in the construction and usually there isn’t a window involved.

Having said that, some gables do have a little window in them, and this can create more expense, so it is really dependent on the type of dormer that you get.  A dormer addition however is a great way to add space and make an unused attic more usable, and give you more living space.

However, keep in mind that these are just estimates. The actual cost can vary widely depending on your specific situation. Portable Buildings of Alberta can give you an accurate quote based on where you are and what type of existing shed you have.  We take into account all of the different things like construction, materials, location, internal and external finishes and of course the final look of the dormer, window and roof.

Also, remember that while adding a dormer can be a significant investment, it can also add value to your home by increasing its square footage, improving its functionality, and enhancing its aesthetic appeal.