House Dormer Plans: Transform Your Attic into Extra Living Space

Marie Jul 01, 2026

Transforming your home's attic into a cozy living space is an exciting project, and house dormer plans are a fantastic way to achieve this. Dormers not only add valuable square footage but also enhance your home's curb appeal and resale value. Let's delve into the world of dormer plans, their types, benefits, and how to choose the perfect one for your home.

Plan 21550DR: Carriage House with Shed Dormer
Plan 21550DR: Carriage House with Shed Dormer

Before we dive into the specifics, it's essential to understand that dormers are roof structures that project vertically from a sloping roof, featuring windows and often a flat or pitched roof of their own. They can significantly alter the appearance of your home, so choosing the right dormer plan is crucial.

Plan 100141 | Cottage, European House with 3 Bed, 3 Bath
Plan 100141 | Cottage, European House with 3 Bed, 3 Bath

Types of Dormer Plans

Knowing the different types of dormers can help you decide which one best suits your home's architecture and your needs.

Farmhouse Plan - 2,317 Square Feet, 5 Bedrooms, 2.5 Bathrooms | Floor Plan #033-00014 | America's Best House Plans
Farmhouse Plan - 2,317 Square Feet, 5 Bedrooms, 2.5 Bathrooms | Floor Plan #033-00014 | America's Best House Plans

1. **Gable Dormers**: These are the most common types, featuring a triangular-shaped roof that matches the pitch of your home's main roof. They provide ample headroom and can be designed with double-hung or casement windows.

Gable Dormer Pros and Cons

a painting of a small house with porches
a painting of a small house with porches

Pros: Gable dormers offer plenty of headroom and can be easily matched to the existing roof pitch. They're also relatively inexpensive to build.

Cons: They may not be suitable for homes with low-pitched roofs, and their triangular shape can limit the size of the window opening.

Gable Dormer Variations

a white two story house with a porch and front door, surrounded by greenery
a white two story house with a porch and front door, surrounded by greenery

Gable dormers can be further categorized into full-width, half-width, and shed dormers. Full-width dormers span the entire width of the house, while half-width dormers cover half the width. Shed dormers have a flat roof that slopes downwards.

Other Popular Dormer Plans

Besides gable dormers, there are several other types to consider.

Home Addition - Plan 5176
Home Addition - Plan 5176

2. **Hip and Valley Dormers**: These dormers have four sloping sides, creating a pyramid-like shape. They're ideal for homes with hip roofs and can provide plenty of natural light.

Hip and Valley Dormer Pros and Cons

Making Shed Dormers Work - Fine Homebuilding
Making Shed Dormers Work - Fine Homebuilding
The Berryhill - PDF Reproducible Set / No Reverse / 2x4 Basement
The Berryhill - PDF Reproducible Set / No Reverse / 2x4 Basement
Juniper Lane - Plank and Pillow
Juniper Lane - Plank and Pillow
Plan 280029JWD: 4-Bed Modern Farmhouse with Large Bonus Room
Plan 280029JWD: 4-Bed Modern Farmhouse with Large Bonus Room
Plan 81854 | European, Farmhouse, French Country, Tudor, Tuscan, Victorian House with 4 Bed, 4 Bath
Plan 81854 | European, Farmhouse, French Country, Tudor, Tuscan, Victorian House with 4 Bed, 4 Bath
Chatham Street | SDC House Plans
Chatham Street | SDC House Plans
Plan 96962 | Bungalow, Cottage, Craftsman House with 3 Bed, 3 Bath, 2 Car
Plan 96962 | Bungalow, Cottage, Craftsman House with 3 Bed, 3 Bath, 2 Car
Craftsman House Plan - 3 Beds 2 Baths 1493 Sq/Ft Plan #1116-32
Craftsman House Plan - 3 Beds 2 Baths 1493 Sq/Ft Plan #1116-32
The Kendleton
The Kendleton
New Shed Dormer for 2 Bedrooms (BRB12) 5176 | The House Designers
New Shed Dormer for 2 Bedrooms (BRB12) 5176 | The House Designers
Plan 810018RBT: 1345 Square Foot Carriage House Plan with Flex Room
Plan 810018RBT: 1345 Square Foot Carriage House Plan with Flex Room
the floor plan for this modern farmhouse house
the floor plan for this modern farmhouse house
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
Minimalist Traditional House Plan with Bonus Room
Minimalist Traditional House Plan with Bonus Room
Making Shed Dormers Work - Fine Homebuilding
Making Shed Dormers Work - Fine Homebuilding
Farmhouse Plan - 2,010 Square Feet, 3 Bedrooms, 2.5 Bathrooms | Floor Plan #7922-00233 | America's Best House Plans
Farmhouse Plan - 2,010 Square Feet, 3 Bedrooms, 2.5 Bathrooms | Floor Plan #7922-00233 | America's Best House Plans
this is an artist's rendering of the country house plans for two story homes
this is an artist's rendering of the country house plans for two story homes

Pros: They offer excellent ventilation and can be designed with large windows for plenty of natural light.

Cons: They can be more complex and expensive to build than gable dormers.

Hip and Valley Dormer Variations

Hip and valley dormers can be designed with a flat or pitched roof, and they can be placed at the front, back, or sides of the house.

3. **Eyebrow Dormers**: These dormers have a curved roof that resembles an eyebrow, hence the name. They're often used to soften the appearance of a steeply pitched roof.

Eyebrow Dormer Pros and Cons

Pros: Eyebrow dormers can add a touch of elegance to your home and are well-suited to Craftsman and bungalow-style homes.

Cons: They may not provide as much headroom as other types of dormers, and they can be more challenging to build.

Eyebrow Dormer Variations

Eyebrow dormers can be designed with a flat or curved roof and can be placed at the front or back of the house.

When choosing a dormer plan, consider your home's architectural style, the amount of space you need, your budget, and any local building codes or homeowner association rules. It's also a good idea to consult with a professional architect or builder to ensure your chosen dormer plan is structurally sound and compatible with your home.

Incorporating a dormer into your home can be a rewarding project that adds both functionality and aesthetic appeal. So, start exploring dormer plans today and transform your attic into a space you'll love to live in!