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Mansard – 20′ x 20′ Detached Two-Car Garage


The Mansard – A traditional utilitarian design, this 20′ wide x 20′ deep traditional style two-car garage features 21″ overhangs, rough stucco siding beneath a mansard roof and 348 square feet of finished interior floor space.


Mansard – 20′ x 20′ Detached Two-Car Garage

Mansard – 20′ x 20′ Detached Two-Car Garage

3D perspective of Mansard style two-car garage blueprints
Driveway approach

This 20′ x 20′ Mansard style detached two-car garage blueprint package is a contemporary styled and very popular garage plan. It’s perfect for homeowners in Canada looking to add a versatile and stylish addition to their property. Permit-ready garage Canada!

Featuring a rough finished stucco cladding, 21″ deep overhangs, large casement windows and a 16′ wide x 7′ tall overhead door, these two-car garage plans make for easy permitting in places like Vancouver & Calgary.

From our Mansard Collection, this garage plan is available in one and four-car options.

Quick Facts

Mansard – 20′ x 20′ Detached Two-Car Garage

The Exterior:

Mansard – 20′ x 20′ Detached Two-Car Garage

Measuring 20′ x 20′, this Mansard-style detached two-car garage is a classically styled example of form follows function.

With the roof form driving the name, the same is true for its architectural design as the roof brings together a 12:12 sloped roof with a small flat portion on top that allows for the look of a heavy sloped roof garage with the benefits of reduced building height.

This unique roof structure offers an opportunity for storage in a small attic-style storage area above the garage parking, depending on your municipality.

Measuring 20′ wide x 20′ deep, this generically styled garage features a 400 sf footprint and approximately 345 sf of finished interior space. The 21″ roof overhangs provide valuable protection from the elements while a central roof drain scoops away water into your two-pipe drainage system or rock pit.

Perforated aluminum soffits help decrease costs, while wall-mounted compact fluorescent lights are used rather than recessed soffit lighting. Several casement windows provide plenty of natural light to the interior while the rough finish stucco cladding with a complete rain screen provides a durable and aesthetically pleasing finish you can rely on.

The Interior:

Mansard – 20′ x 20′ Detached Two-Car Garage

On the interior, you have a painted drywall finish with two parking stalls; each is measuring 18′-8″ deep x 9′-4″ wide.

Access to the garage comes from a dedicated garage entrance off a 36″ wide side entrance door or through the 16′ wide by 7′ tall rolling overhead garage door.

The Mansard – 20′ x 20′ detached two-Car garage has a finished floor-to-ceiling height of 9′-0″, thus leaving some room to amend the plans to an 8′ tall overhead door if you so choose. Windows are placed at 42″ above the concrete floor, making a workbench fit in nicely beneath.

Ceiling-mounted compact fluorescent lights are typical inside, with ample wall receptacles specified off of a dedicated 60 AMP electrical sub-panel. A thoughtfully designed permit-ready garage Canada.

Have You Seen These Plans?

This Plan Package Includes:

Mansard – 20′ x 20′ Detached Two-Car Garage

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Mansard – 20′ x 20′ Detached Two-Car Garage
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Mansard – 20′ x 20′ Detached Two-Car Garage

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(1 customer review)


3D perspective of Mansard style two-car garage blueprints
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Adaptive Plans Inc.

Product Line

Parking Stalls

2 Stalls


20'-0" (6.09m)


20'-0" (6.10m)

Building height

Under 5m (16.40ft), Under 6m (19.68ft), Under 7m (22.97ft), Under 8m (26.25ft), Under 9m (29.52ft)


400 sf

Square Footage

348 sf

Interior Ceiling Height

9 Feet

Vaulted Ceilings


Garage Door Width

16 Feet

Garage Door Height

7 Feet



Climatic Zone

BC – Zone 4, BC – Zone 5 to 7a, BC – Zone 7b & 8

Cladding Type

Acrylic Stucco Siding

Roof Style

Mansard Roof

Roof Slope

12:12 Slope, No Slope

Roof Structure

Stick Frame Rafters

Roofing Material

Asphalt Shingle Roofing, Synthetic Torch-on Roof Membrane

Roof Overhang

21 Inches

Number of Windows

2 Windows



Covered Entry




Construction Details

Electrical Plan, Footing Detail, Foundation Plan, Reflected Ceiling Plan, Soffit Detail

Structural Engineering Included



24"x36" Architectural Bond Paper, CAD File, PDF File

Pottery Studio


Scratch Set



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1 review for Mansard – 20′ x 20′ Detached Two-Car Garage

  1. Tammy

    I wanted extra storage space so I picked this one. It was hard to get it passed at city hall with the extra space, I wasn’t expecting it to be so hard. It’s done now they accepted it, but not without a lot of work on my husbands side.

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