ADU Builders in Ottawa
Why Homeowners Choose OakWood
Ottawa Design & Build Experts Since 1956
Complete Permit & Zoning Support
One Team from Design to Construction
Award-Winning Design Centre
Build More Space, Flexibility & Value with an ADU
Accessory Dwelling Units (ADUs) are one of the fastest-growing housing solutions in Ottawa. Whether you’re creating a private space for family members, generating rental income, accommodating multi-generational living, or increasing the long-term value of your property, an ADU offers flexibility and opportunity.
OakWood’s award-winning Design & Build team manages every stage of your project, including planning, architectural design, permits, material selection, construction, and project management. With more than 65 years of experience serving Ottawa homeowners, we make building an ADU simple, efficient, and stress-free.
Is Your Property a Good Fit for an ADU?
Not every property is suitable for an Accessory Dwelling Unit.
Before investing in plans or permits, OakWood evaluates your property’s zoning, lot size, servicing capacity, setbacks, access requirements, parking considerations, and municipal regulations to determine the most suitable ADU solution.
Our feasibility-first approach helps homeowners make informed decisions before construction begins.
Which ADU Option Fits Your Property?
Coach House
Separate residential building above the garage or detached structure
Best for:
- Long-term rental
- Family & Guests
Basement Apartment
Convert unused basement into legal secondary dwelling
Best for:
- Fastest ROI
- Rental income
OakWood’s Complete ADU Design & Build Solution Includes
Why Ottawa Homeowners Build ADUs
Rental Income Opportunities
Create a legal secondary dwelling unit that generates ongoing rental income and improves your property’s long-term financial performance.
Multi-Generational Living
Keep family members close while providing privacy, independence, and comfortable living accommodations.
Aging in Place Solutions
Support aging parents or loved ones with a safe and accessible living environment near family.
Home Office or Studio Space
Create a dedicated workspace, creative studio, or professional office separate from your primary residence.
Guest Accommodation
Provide comfortable accommodations for extended family and visitors without compromising your home’s privacy.
Increased Property Value
ADUs are one of the most effective ways to increase usable living space and improve overall property value.
In-House Architectural Design
Explore ADU, Garden Suite & Coach House Design Ideas
ADU Design & Build Process
Step 1: Consultation
Discuss goals, property suitability, and budget.
Step 2: Site Evaluation
Review zoning, lot coverage, setbacks, and servicing requirements.
Step 3: Design & Planning
Architectural drawings and permit-ready plans.
Step 4: Permit Approval
Support through Ottawa permit and compliance requirements.
Step 5: Construction
Turnkey Design & Build delivery.
Step 6: Move-In Ready Completion
Final inspections and occupancy.
Planning and material selection couldn’t be easier
With OakWood you get a one-stop large project solution. Everything you need is under one roof at our award-winning Design Centre and Showroom.
Choose from a broad range of material choices including marble, granite, various wood options, linoleum, laminate and eco-friendly options like cork or bamboo. Our Design Consultants will help you select flooring solutions that complement the style, function, and long-term durability requirements of your ADU.
Natural light plays an important role in making an ADU feel bright, spacious, and welcoming. Energy-efficient windows help improve comfort while reducing heating and cooling costs throughout the year. Casement windows, Bay or Bow windows, awning windows, architectural windows, single and double hung tilt windows and many other styles. See them all at the OakWood Design Centre.
Private Entry Door Solutions
Independent access is often one of the most important features of an ADU. OakWood offers a wide range of secure, energy-efficient entry systems designed to provide privacy, convenience, and curb appeal while complementing your home’s architecture.
Smart & Energy-Efficient ADU Solutions
Modern ADUs benefit from advanced building technologies that improve comfort, efficiency, and sustainability. OakWood can integrate smart home automation, high-performance insulation systems, EV charging solutions, battery backup systems, energy-efficient HVAC equipment, solar-ready infrastructure, and other innovative technologies that enhance long-term value.
This list barely scratches the surface of possibilities for your ADU renovation.Schedule a consult and tour of the Design Centre to see hundreds of options..
ADU Feasibility Checklist
Lot Size
Property Access
Zoning
Parking
Utility Connections
Water & Sewer
Fire Separation
Privacy
Setbacks
Budget
Rental Readiness
Permit Requirements
All Services
Custom Homes
Energy efficient custom built homes that are healthy, technology enabled and eco-friendly. Start planning your dream home today
Renovation Experts
ADU Regulations & Permits in Ottawa
Building an Accessory Dwelling Unit in Ottawa requires careful consideration of zoning regulations, setback requirements, lot coverage limitations, utility servicing, and permit approvals. OakWood’s Design & Build team helps homeowners navigate these requirements while creating functional, attractive living spaces that comply with municipal guidelines.
Whether you are considering a detached garden suite, coach house, basement apartment, or attached secondary dwelling unit, our team can guide you through the planning and approval process.
What Our Clients Are Saying
Frequently Asked Questions!
What is an ADU?
An Accessory Dwelling Unit (ADU) is a self-contained residential living space located on the same property as a primary residence.
How much does it cost to build an ADU in Ottawa?
Costs vary depending on size, design complexity, site conditions, servicing requirements, and finishes. OakWood can provide a detailed consultation and project estimate.
Can I rent out my ADU?
In many cases, ADUs can be used as rental units, subject to municipal regulations and permitting requirements.
What is the difference between a garden suite and a coach house?
Both are forms of detached ADUs. The specific classification may vary based on local regulations and site conditions.
Do ADUs increase property value?
Yes. An ADU can increase usable living space, create rental income opportunities, and improve overall property value.
How long does it take to build an ADU?
Project timelines vary depending on design complexity, approvals, and construction requirements, but most projects follow a structured Design & Build process from planning through completion.

