Understanding Dormers: What is a Dormer on a House?

Marie Jul 01, 2026

A dormer is a structural element that projects vertically from a sloping roof, creating additional living space and natural light within the house. These architectural features are commonly found in homes with pitched roofs, adding character and functionality to the overall design.

12 Different Types of Dormers with Pictures
12 Different Types of Dormers with Pictures

Dormers have been a staple in residential architecture for centuries, originating from medieval Europe. They serve multiple purposes, including increasing the headroom in attic spaces, providing extra windows for natural light and ventilation, and enhancing the aesthetic appeal of a home's exterior.

the different types of windows and doors in an architectural drawing class, with instructions to draw them
the different types of windows and doors in an architectural drawing class, with instructions to draw them

Types of Dormers

Dormers can be categorized into several types based on their design and structure. Understanding these types can help homeowners determine the best fit for their property.

Designing Shed Dormers - Fine Homebuilding
Designing Shed Dormers - Fine Homebuilding

1. **Gable-front Dormer**: This type features a gable roof that matches the main roof's pitch. It is often used to create a prominent focal point on the home's facade and can be found in various architectural styles.

Gable-front Dormer Variations

Framing an A-Dormer
Framing an A-Dormer

Gable-front dormers can be further categorized into subtypes, such as the full-width dormer, which spans the entire width of the house, and the segmental dormer, which has a curved or arched roof.

2. **Hip-roof Dormer**: A hip-roof dormer has four sloping sides, with the roof meeting at the corners. This type is often used to create a more uniform appearance across the roof's surface and can be found in homes with hip roofs.

Hip-roof Dormer Variations

the interior of a house being built with wooden framing and windows on each side of the room
the interior of a house being built with wooden framing and windows on each side of the room

Hip-roof dormers can also have variations, like the eyebrow dormer, which has a gentle, continuous curve, and the jerkinhead dormer, which has short, inclined ends.

Benefits of Adding a Dormer

Incorporating a dormer into a home's design can provide numerous benefits, making it an attractive option for homeowners looking to enhance their living space.

13 Types Of Dormers (Benefits & Designs)
13 Types Of Dormers (Benefits & Designs)

1. **Increased Living Space**: Dormers allow homeowners to convert previously unused attic space into functional rooms, such as bedrooms, bathrooms, or home offices.

Maximizing Space

Home - Omni Construction Company
Home - Omni Construction Company
four different views of a white house with yellow shingles on the roof and windows
four different views of a white house with yellow shingles on the roof and windows
How To Build Two Car Garage And Shed Dormer Between Two Gables - Building Education Series Part 18
How To Build Two Car Garage And Shed Dormer Between Two Gables - Building Education Series Part 18
four types of dormers on top of each other with the names above them in black and white
four types of dormers on top of each other with the names above them in black and white
Making Shed Dormers Work - Fine Homebuilding
Making Shed Dormers Work - Fine Homebuilding
Shed-Dormer Retrofit - Fine Homebuilding
Shed-Dormer Retrofit - Fine Homebuilding
Frame a Classic Shed Dormer
Frame a Classic Shed Dormer
How to Frame a Gabled Dormer
How to Frame a Gabled Dormer
two men working on the roof of a house
two men working on the roof of a house
14 Gorgeous Houses with Dormer Windows | brick&batten
14 Gorgeous Houses with Dormer Windows | brick&batten
Adding a dormer can brighten up a small attic room
Adding a dormer can brighten up a small attic room
Drawing a Shed Dormer Manually
Drawing a Shed Dormer Manually
Dormer
Dormer
Frame a Classic Shed Dormer - Fine Homebuilding
Frame a Classic Shed Dormer - Fine Homebuilding
two men are working on the roof of a house that's being built in front of it
two men are working on the roof of a house that's being built in front of it
Home Improvement Story Book Dormers - Great Design Ideas Cape Cods and Beyond
Home Improvement Story Book Dormers - Great Design Ideas Cape Cods and Beyond
Renovation Dreamin' – Plaster & Disaster
Renovation Dreamin' – Plaster & Disaster
The Iterative Design Process - Creating the Plan
The Iterative Design Process - Creating the Plan
Dormers
Dormers
Dormer Addition Ideas: Add Dormers to Your House!
Dormer Addition Ideas: Add Dormers to Your House!

By adding a dormer, homeowners can create taller ceilings and larger floor plans, making the attic space more comfortable and practical for everyday use.

2. **Natural Light and Ventilation**: Dormers provide additional windows, allowing for increased natural light and improved ventilation throughout the home.

Energy Efficiency

Better lighting and ventilation can help reduce the need for artificial lighting and air conditioning, potentially lowering energy costs and improving overall energy efficiency.

Incorporating a dormer into a home's design can significantly enhance its functionality, aesthetics, and value. By understanding the different types of dormers and their benefits, homeowners can make informed decisions about how to best utilize this versatile architectural feature in their own properties.