FlexoBuild Garden Suite

Humber 378

A compact 378 sq ft backyard garden suite with one bedroom, one full bathroom and an open-concept layout designed to make a small footprint feel surprisingly spacious.

Zoning review typically completed in 48 hours
Humber 378 FlexoBuild garden suite
378 sq ft Living space
1 Bedroom Private bedroom
1 Bathroom Full bathroom
Small footprint. Surprisingly spacious living.

The Humber 378 is a 378 sq ft ARU backyard garden suite with one bedroom and one bathroom, designed for efficient and comfortable living. Sloped ceilings reaching up to 11 feet and an open-concept layout create a surprisingly spacious feel, paired with high-quality materials and a clean, modern design. Built using FlexoBuild's prefabricated structural steel insulated panels, the Humber 378 delivers energy efficiency, durability and quick installation.

Floor Plan

378 sq ft Used Intelligently

The Humber 378 combines a private bedroom, full bathroom, kitchen and open living area within a highly efficient compact footprint.

The open-concept design and high sloped ceiling help the interior feel considerably larger than its physical footprint, making it particularly well suited to smaller properties.

Humber 378 one-bedroom floor plan
Explore the Layout

See How 378 sq ft Works

Three-dimensional floor plan views show how the bedroom, bathroom, kitchen and living space fit together within the Humber's compact footprint.

Humber 378 3D floor plan view 1
Humber 378 3D floor plan view 2
Humber 378 3D floor plan view 3
Compact Independent Living

A Complete Home in Just 378 sq ft

The Humber 378 is designed for homeowners who need genuine independent accommodation without using more backyard space than necessary.

Multigenerational Living Create private independent accommodation for a parent or family member while keeping them close to the main home.
Rental Income A self-contained one-bedroom backyard home that can provide additional residential space or rental potential.
Smaller Properties The compact footprint makes the Humber particularly useful where backyard space or lot coverage is limited.
Private Retreat A comfortable independent space for guests, extended stays or a private backyard retreat.
Humber 378 compact prefab garden suite
Compact by Design

More Living Space Without Taking Over Your Backyard

At only 378 sq ft, the Humber is designed to provide the essential features of an independent home while preserving as much outdoor space as possible.

FlexoBuild's prefabricated structural steel insulated panel system also allows the building envelope to be installed quickly with minimal disruption to the existing property.

What To Expect

FlexoBuild Home Kit + Local Completion

FlexoBuild supplies the engineered building system and documentation. Your local FlexoConnect member coordinates and validates the project-specific work required to complete your Humber 378.

FlexoBuild Home Kit

Supplied by FlexoBuild
  • Delivery to site
  • Building permit drawing package
  • Detailed instruction manual
  • Connection angles & stiffeners
  • Special panel clamps, fasteners & sealants
  • Galvanized C-channel floor members
  • Pre-cut Structural Insulated Panel system including floor, walls and roof
  • Finished exterior facade
  • Thermal & moisture protection
  • Standard exterior trim & flashing package
  • Exterior windows & doors supplied

Estimate to Complete

By Your FlexoConnect Member
  • Home assembly & installation
  • Trenching and utility service connections
  • Helical pile foundation
  • Required interior framing
  • Drywall, flooring, trim & wall paint
  • Kitchen cabinetry supply & installation
  • Bathroom vanity, toilet & shower
  • Electrical, mechanical & plumbing
  • Entry deck(s)

Images may show features not included in the FlexoBuild kit, such as exterior lighting and decorative finishes.

Floorplans are for reference only and include furnishings by others. Final layouts with door and window choices and placements are confirmed during the FlexoBuild design phase. Design changes may incur engineering fees.

Permit application, survey, grading, development and other supporting municipality fees are payable by the owner.

Your local FlexoConnect member validates all project-specific prices including foundation, home installation, services and interior finishes.

Utility assumptions are based on approximately 30 ft from the service connection. Estimate to Complete is based on standard finishes. Personal preferences may incur additional cost.

All pricing excludes applicable taxes.

Could the Humber 378 Work on Your Property?

Start with a free property eligibility check. A FlexoBuild ADU specialist can review your property and help determine whether the compact Humber 378 is a practical fit.

Humber 378

  • One Bed
  • One Bath
  • 378sqft
Free property eligibility check
Zoning review typically completed in 48 hours

The Humber 378 is a 378sqft ARU backyard garden suite with one bedroom and one bathroom, designed for efficient and comfortable living. Sloped ceilings up to 11 feet and an open-concept layout create a surprisingly spacious feel - paired with high-quality materials for a clean, modern design. Built with FlexoBuild’s prefabricated structural steel insulated panels, it offers energy efficiency, durability, and quick installation, making it ideal for multigenerational living, rental income, or a private retreat.

Note: Images may show features not included in the FlexoBuild kit, such as exterior lighting and decorative finishes. Floorplans are for reference only and include furnishings by others. Final layouts with door and window choices and placements confirmed during the FlexoBuild design phase. See "What to Expect" for included/excluded items. Design changes may incur engineering fees. Contact us for details.

What To Expect

FlexoBuild Home Kit

  • Delivery to site
  • Building permit drawing package (2)
  • Detailed instruction manual
  • Connection angles & stiffeners
  • Special panel clamps, fasteners & sealants
  • Galvanized c-channel floor members
  • Pre-cut Structural Insulated Panel (SIP) system including floor, walls and roof, complete with finished exterior facade, thermal & moisture protection.
  • Standard exterior trim & flashing package
  • Exterior windows & doors - (supply only, openings cut on site by others)

Estimate to Complete(3)

(by FlexoConnect Member)

  • Home assembly & installation
  • Trenching and utility services connection (4)
  • Helical Pile Foundation
  • Interior finishes such as required framing, drywall, flooring, trim, wall paint, kitchen cabinetry supply & installation (5)
  • Bathroom vanity, toilet and shower.
  • Electrical, mechanical and plumbing
  • Entry deck(s) (5)

All pricing excludes applicable taxes.
(1) Your project may qualify under the GST/HST New Housing Rebate program. Click
here for more information.
(2) All fees, such as permit application, survey, grading, development, etc. or any other supporting documents as requested from the municipality is payable by owner.
(3) Your local FlexoConnect member will validate all project specific prices including foundation, home installation, services, and interior finishes.
(4) Assuming approximately 30ft from services connection.
(5) Estimate to Complete is based on standard finishes. Personal preferences may incur an additional cost.