Beauty Shot

A functional, modern garage for any urban setting.

Form meets function in our newest garage: the Annex. Part of Summerwood's Modern Styles Collection, the Annex is clean, simple, and polished, possessing the unique ability to complement any setting while making a bold statement.


The Annex is perfectly suited for any urban setting, from driveways to laneways. The recessed entry serves a dual purpose, both defining the contemporary exterior and protecting you from the elements as you come and go.

Annex Style Guide

Sample Annex gallery

Swipe to browse photos or tap for pricing/details.

Annex specifications


  • Whether you’re in desperate need of dedicated car storage, or dreaming of your very own home office — or both — the flexible floorplan can be adapted to make all your garage goals a reality.

    Find everything you need to know about the Annex in these style tabs.

  • Annex Modern Garage
    illustration only
    24' x 24' Annex
  • Contemporary flat roof (0.5/12 pitch)

  • A range of sizes for plenty of storage

  • Premium STK Western Red Cedar siding + stainless steel fasteners

  • Enhanced siding package

  • Full 2-year warranty on materials and craftsmanship

    Popular Options & Upgrades:
  • Additional studio/storage space

  • Clear cedar siding (thin, modern nickel gap or v-joint profiles)

  • Standing seam steel siding

  • Pine T&G or cedar channel interior cladding

  • Roller double garage door

  • Modern vinyl sliding doors and windows

  • Maintenance-free Canexel siding in a variety of colours

  • Maintenance-free Siparila wood siding in six natural tones

Available Annex garage sizes

The Annex is offered in sizes starting at 480 ft². If you don’t see the size you’re looking for in the price list, please contact us.

Annex Interior

Below are some Annex interiors to help you envision your layout. Click to learn more about the buildings featured. For more ideas and photos, visit our Interiors page.

Floor plans

The Annex is available in a range of layouts and sizes, with plenty of space for cars, bikes, and miscellaneous storage. Add a partition wall to create an additional, multi-functional interior space—use it as a home office or gym, a studio or workshop, or a bonus storage area!

  • 32’ x 24’ Annex with 8’ studio

    Annex Modern Garage
  • 24’ x 24’ Annex

    Annex Modern Garage
Sample Annex Floor Plans

Feeling inspired? Get creative with this fun, simple layout tool for planning your interior.
Or, download graph paper and plan your space the old fashioned way.

  • 3D Tour of Annex Garage

    View a 3D tour of the Annex in both urban driveway and laneway settings, illustrating a combination of standard features and construction/material upgrades. The garages shown here include modern windows and doors, clear cedar and standing seam siding, and an optional additional interior space.

    Visit our 3D Tours page to see all the Summerwood garage styles.

  • Annex Garage design video tour


Level of Difficulty:

The Annex includes easy-to-follow instructions and diagrams that will walk you through every step of the building process. Our online and telephone assembly support are always within reach.

Hiring a contractor

If you think you may want assistance with assembling your Annex, check out our Hire a Contractor page.

Hiring a contractor Modern Annex garage
Contractor working on a garage

* photos and renderings illustrate a combination of standard features and construction/material upgrades; see style tabs for detailed product specifications

details & specs

Annex Modern Garage Dimensions

Annex Modern Garage Dimensions Annex Modern Garage Dimensions Annex Modern Garage Dimensions
24' 8' - 11"
26' 8' - 10"
28' 8' - 9"
30' 8' - 8"
32' 8' - 7"
34' 8' - 6"
36' 8' - 5"
* all dimensions are approximate

Still have questions about the size of your Annex? Don’t hesitate to ask — we’re here to help!

Wall Plan

Annex Modern Garage Wall Plan
Annex wall component

Our garage walls are framed with 2 x 6 spruce studs for added strength.

Roof Framing Plan

The Annex garage’s contemporary flat roof (1/12 pitch) consists of pre-engineered trusses and 5/8” T&G plywood sheathing.

Flat roofs do not always require vents. Consult your contractor or roofing company for the most effective ventilation system for your roof.

Annex Modern Garage Roof Framing Plan
Annex roof framing plan


Most Annex garages should be built on concrete foundation walls with footings.

Visit our Foundations page for more details, or contact one of our design specialists for assistance.

Annex Modern Garage Foundations


Summerwood buildings are constructed with style and longevity in mind. Like all our designs, the Annex is a fantastic display of premium grade materials chosen for their beauty, durability, and environmental friendliness.

item material dimension notes
wall plates spruce 2x6 bottom, top, double top
wall studs spruce 2x6 16" on center
exterior siding stk cedar channel (shiplap) 1x8 horizontal
enhanced siding package osb + typar ⁷⁄₁₆" wall sheathing & building wrap
material options + upgrades
exterior siding stk cedar channel (shiplap) 1x8 vertical
clear cedar t&g nickel gap 1x4 or 1x6 horizontal or vertical
clear cedar t&g v-joint 1x4 vertical installation only
canexel ⁷⁄₁₆x12 maintenance-free; various colors
siparila wood 1x6 maintenance-free; 6 natural tones
standing seam steel 19 ¼" (covered) vertical; 24-gauge galvalume plus
interior siding pine t&g 1x6 n/a
cedar channel 1x6 n/a
enhanced siding package plywood + typar ¼" wall sheathing & building wrap
item material dimension notes
pre-eng. roof truss spruce chords/webs + metal gusset plates 26" - 30" height variable based on span
sheathing t&g plywood ⅝" n/a
item material dimension notes
soffit stk cedar channel 1x8 n/a
fascia + corner boards stk cedar varies n/a
material options + upgrades
soffit clear cedar t&g v-joint 1x6 n/a
fascia + corner boards clear cedar varies n/a
versatex (white) varies n/a
siparila wood (black or white) varies n/a

Enhanced Siding Package (ESP)

Your Annex includes our enhanced siding package: a layer of sheathing (OSB or plywood) and building wrap (a breathable, water-resistant air barrier) between the siding and the wall framing that give the structure shear strength and act as an additional plane of protection against moisture.

Annex Urban Garage Enhanced Siding Package
Enhanced siding package upgrade


Once your Annex is complete, there are even more ways you can tailor your interior to suit your taste and needs. See Interior Finishing for more information.


Planning to use your Annex year-round? There are a number of methods for insulating your garage to provide enjoyment all year long. Ask one of our design specialists for more information.

Annex Modern Garage Insulation
Insulation material for a prefab garage


The inside of your Annex is ready to accommodate wiring for lighting, outlets, heating equipment, garage door openers, stationary power tools, and anything else you have in mind. Once the installation is complete and before finishing your interior, simply have an electrician come in and do their thing.

Annex Modern Garage Electrical
Electrical configuration example


Provided you have a water source nearby, your Annex can be plumbed with sinks and taps. If you have something a little more elaborate in mind, like a shower or a toilet, make sure it’s coordinated with the installation of your concrete pad and garage.

Annex Modern Garage Plumbing
Bathroom configuration


Visit "options and accessories" for detail and pricing of our accessories.

Find below pricing for all of the Annex sizes that we have built so far. Don't see your size? Ask us and we will provide you with a quote.

Note that pricing below is for the base kit only. Doors, windows, and other options are à la cart so that you can customize to your hearts content.

SM Annex
Garages (<70 sq.ft.)

All prices in $USD
Small Annex
Garages, price list
kit size pre-cut pre-assembled

MD Annex
Garages ( 70 - 100 sq.ft.)

All prices in $USD
Medium Annex
Garages, price list
kit size pre-cut pre-assembled

LG Annex
Garages (100 - 130 sq.ft)

All prices in $USD
Large Annex
Garages, price list
kit size pre-cut pre-assembled

XLG Annex
Garages ( >130 sq.ft.)

All prices in $USD
Medium Annex
Garages, price list
kit size pre-cut pre-assembled
16ft.x16ft. $40,695 $28,486 $45,695 $31,986
14ft.x20ft. $44,495 $31,146 $49,895 $34,926
24ft.x12ft. $26,695 $18,686 $29,795 $20,856
24ft.x14ft. $31,095 $21,766 $34,695 $24,286
24ft.x15ft. $33,195 $23,236 $37,095 $25,966
36ft.x12ft. $38,495 $26,946 $43,195 $30,236
32ft.x14ft. $40,595 $28,416 $45,495 $31,846
24ft.x20ft. $44,495 $31,146 $49,895 $34,926
20ft.x24ft. $44,495 $31,146 $49,895 $34,926
25ft.x20ft. $45,895 $32,126 $51,395 $35,976
32ft.x16ft. $47,395 $33,176 $53,195 $37,236
32ft.x17ft. $50,395 $35,276 $56,495 $39,546
17ft.x32ft. $50,395 $35,276 $56,495 $39,546
24ft.x24ft. $53,695 $37,586 $60,295 $42,206
24ft.x26ft. $57,495 $40,246 $64,395 $45,076
25ft.x25ft. $57,295 $40,106 $64,095 $44,866
28ft.x24ft. $60,595 $42,416 $68,195 $47,736
24ft.x28ft. $60,995 $42,696 $68,595 $48,016
26ft.x26ft. $61,095 $42,766 $68,695 $48,086
30ft.x24ft. $64,595 $45,216 $72,595 $50,816
24ft.x30ft. $64,595 $45,216 $72,595 $50,816
31ft.x24ft. $65,095 $45,566 $72,995 $51,096
30ft.x25ft. $65,195 $45,636 $73,095 $51,166
25ft.x30ft. $65,195 $45,636 $73,095 $51,166
32ft.x24ft. $66,295 $46,406 $74,395 $52,076
30ft.x26ft. $68,895 $48,226 $77,495 $54,246
28ft.x28ft. $72,195 $50,536 $81,095 $56,766
20ft.x40ft. $72,995 $51,096 $81,895 $57,326
32ft.x26ft. $75,495 $52,846 $84,795 $59,356
36ft.x24ft. $77,895 $54,526 $87,495 $61,246
24ft.x36ft. $77,895 $54,526 $87,495 $61,246
32ft.x28ft. $79,195 $55,436 $88,995 $62,296
30ft.x30ft. $79,495 $55,646 $89,395 $62,576
26ft.x36ft. $82,695 $57,886 $92,995 $65,096
21ft.x47ft. $87,195 $61,036 $97,995 $68,596
25ft.x40ft. $88,395 $61,876 $99,295 $69,506
35ft.x29ft. $89,695 $62,786 $100,695 $70,486
29ft.x35ft. $89,695 $62,786 $100,695 $70,486
40ft.x28ft. $98,995 $69,296 $111,095 $77,766
28ft.x40ft. $98,995 $69,296 $111,095 $77,766
36ft.x32ft. $101,795 $71,256 $114,195 $79,936

Custom Designs

Summerwood will take your custom design and make it your own. If you have something different in mind, talk to one of our designers about bringing it to life.

get a professional involved

Our seasoned designers would love to help you find your ideal design.
We're just a phone call away.

Contact us