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Property Types & Construction

Dormer

Definition and meaning of Dormer in real estate.

A dormer is a roofed structure containing a window that projects vertically beyond the plane of a sloping roof. This architectural feature is designed to increase usable space in a loft or attic while bringing natural light and ventilation into upper levels.

In more detail

Dormers come in various styles, including gabled, shed, and eyebrow designs, depending on the home's architectural style. Installing a dormer is a common way to renovate a house, turning an cramped attic into a functional bedroom or office. Homebuyers should inspect the junctions around dormers for proper flashing and sealing, as these intersections are prone to water leaks if poorly constructed. Adding one typically requires local building permits and structural modifications to the roof framing.

Key facts

CategoryProperty Types & Construction
Primary functionAdds headroom, light, and ventilation to attics
Common stylesGabled, shed, hipped, and eyebrow dormers
Watch out forWater leaks around flashing and valley junctions
Example

To turn their unused attic into a guest room, the homeowners hired a contractor to install a doghouse dormer, which added enough headroom for a small desk and a window overlooking the garden.

Frequently asked questions

Can I add a dormer to any sloping roof?

In many cases yes, but it depends on the roof's structural integrity, local zoning laws, and building height restrictions. A structural engineer or contractor should evaluate the home before proceeding.

Do dormers increase a home's resale value?

Yes, by adding functional square footage and natural light to an attic space, a well-designed dormer typically increases the home's overall appeal and market value.

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