Design: Pre-reviewed Designs

Key Info

Sample Home Design: Carruthers

Specifications

  • Number of Units 4
  • Size of Units < 1200 sqft
  • Number of Structures 1
  • Bedrooms Per Unit 1, 3

Size of Project

  • Width of Build < 25’
  • Number of Storeys 2.5 Storeys
  • Total Build Area < 4500 sqft

Lot Attributes

  • Lot Type Mid-block
  • Vehicle Access Front, Rear

These designs are for illustrative purposes only, and not intended for construction.

This design boasts a simple yet timeless “house-shaped” form, concealing four units within its structure. Proven successful in Ottawa’s houseplex zones, it offers flexibility as either four strata units or a duplex, each with a suite. The upper units feature optional hidden roof decks, adding to their allure and functionality.

Despite its compact footprint, the design leaves ample room for generous yard space, even on a mid-sized lot. It’s intended to facilitate mirroring on a pair of lots, with space for a shared driveway between them, leading to rear parking. In total, the design accommodates 8 bedrooms. The proposed floor space ratios (FSR) are 1.11 on a 33×100’ lot and 0.73 on a 50×100’ lot, showcasing efficient land usage while maintaining livability and functionality.

Drawing and Images

Cost Estimate

Check the cost estimate

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This resource hub from California ADU (UC Berkeley’s Center for Community Innovation) features best practices for facilitating attached and detached ADU development in light of enabling state legislation passed in California in 2016.

Key insights:

Highlighted initiatives include:

  • Introducing pre-approved designs
  • Providing supportive project financing
  • Increasing public awareness of new ADU regulations.
  • Explore spatial visuals of ADU permitting and development in California (2018-2022)
  • Engage with previous research released by the Center for Community Innovation.

Past work notably includes a jurisdictional scan which grades municipal ADU ordinances based on their compliance with state legislation and use of best practices.

You can access their full suite of resources on their dedicated homepage.