Not every home project fits neatly into a category like “kitchen” or “bathroom.” Some homeowners dream big — adding entire rooms, creating rental suites, converting garages, or even building unique outdoor spaces. These are custom projects, and they’re some of the most exciting (and valuable) ways to enhance your home.
At Home Affairs, we specialize in turning your one-of-a-kind ideas into real, functional, and beautifully finished living spaces. In this blog, we’ll break down average costs for custom home projects in 2025, highlight what affects pricing, and help you plan for success.
What Are Custom Home Projects?
Custom projects vary based on your needs and property. Here are a few examples:
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Home additions (bedrooms, bathrooms, sunrooms)
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Basement suites or secondary rental units
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Garage conversions into studios, offices, or gyms
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Outdoor living areas (covered decks, kitchens, patios)
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Full home renovations or layout changes
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Accessory Dwelling Units (ADUs) for multigenerational living
If it’s not a standard remodel — it’s a custom project.
Average Custom Project Costs in 2025 (Canada)
Prices vary widely based on size, complexity, and finish level. Here’s a rough guide:
| Project Type | Typical Cost Range |
|---|---|
| Garage Conversion | $20,000 – $45,000 |
| Basement Suite | $45,000 – $90,000+ |
| Home Addition (200–500 sq ft) | $50,000 – $120,000+ |
| Outdoor Living Space | $15,000 – $50,000+ |
| Whole-Home Renovation | $100,000 – $300,000+ |
💡 Planning a 400 sq. ft. family room addition with a bathroom? Expect $70,000–$100,000 depending on materials and plumbing needs.
What Impacts the Cost of a Custom Project?
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Size and Scope — Larger square footage = more materials, labor, and time.
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Permits and Zoning — Custom projects often require city permits and inspections.
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Plumbing & Electrical — Adding bathrooms or kitchens drives costs higher.
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Structural Work — Moving load-bearing walls or expanding the foundation adds complexity.
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Design & Materials — High-end finishes or custom-built features increase the price.
Is It Worth Doing a Custom Project?
Absolutely — if it meets your needs. Here’s why:
✅ Increases property value
✅ Improves how you use your home
✅ Lets you stay in the same neighborhood
✅ Creates income (rentable units or suites)
✅ Customizes your space for lifestyle or family changes
How Home Affairs Handles Custom Builds
Custom means personalized — and that’s how we treat every project:
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🔍 Free On-Site Consultation – We assess your space, listen to your vision, and discuss possibilities.
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📐 Design & Planning – Work with our team to bring your ideas to life with 3D drawings and permits.
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🔧 Skilled Trades – Licensed electricians, plumbers, framers, and finishers on every job.
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📅 Timeline & Budget Control – Transparent pricing and efficient scheduling.
Build What You’ve Been Dreaming Of
Whether it’s a cozy rental suite, an expanded master bedroom, or a home gym that keeps you motivated — Home Affairs makes it happen. We specialize in smart solutions, clean finishes, and lasting value.
📞 Let’s talk about your custom project today — get a free consultation and quote with a team that builds what you imagine.