Building a house from the ground up gives you complete control over design, quality, and location — but it requires a different financial strategy than buying an existing home. This guide walks you through the entire process from buying land to securing a construction mortgage to moving in.
Overview — the build process
| Phase | Timeline | What Happens |
|---|---|---|
| 1. Land purchase | 1–3 months | Find and buy a building lot |
| 2. Planning & design | 2–6 months | Architect/designer plans, permits, engineering |
| 3. Financing | 1–2 months | Secure construction mortgage |
| 4. Construction | 8–14 months | Build the house in stages |
| 5. Completion | 1–2 months | Final inspections, occupancy permit, mortgage conversion |
| Total | 12–24 months | From land purchase to move-in |
Step 1 — Buying the land
Types of building lots
| Lot Type | Description | Pros | Cons |
|---|---|---|---|
| Serviced lot (subdivision) | Municipal water, sewer, hydro, road access in place | Ready to build; no infrastructure costs | Less privacy; developer restrictions |
| Unserviced lot (rural) | No municipal services; requires well, septic, road | More space, privacy, lower land cost | $30,000–$100,000+ for well, septic, driveway |
| Infill lot (urban) | Empty or tear-down lot in an established neighborhood | Premium location; land appreciation | Expensive; tight building envelope; neighbor issues |
| Estate lot | Large (1–10+ acres) in semi-rural areas | Privacy, space for large custom homes | Longer build times; access and service costs |
Due diligence before buying land
| Check | Why It Matters |
|---|---|
| Zoning | Confirms residential use is permitted; sets setbacks, height limits, lot coverage |
| Soil test / geotechnical report | Reveals if the soil can support a foundation; identifies rock, clay, water table issues |
| Environmental assessment | Required in some areas; checks for contamination, protected species, wetlands |
| Survey | Confirms exact boundaries, easements, right-of-ways |
| Percolation test (rural) | Determines if the soil is suitable for a septic system |
| Well assessment (rural) | Checks water availability and quality — drill a test well before buying |
| Municipal services | Confirm water, sewer, hydro, gas availability and connection costs |
| Road access | Legal access confirmed? Year-round maintained? |
| Development charges | Municipal fees for new construction — can be $20,000–$80,000+ |
| Building restrictions | HOA, subdivision agreements, architectural controls, conservation authority rules |
Financing the land purchase
| Option | Details |
|---|---|
| Cash | Simplest; land is fully paid and becomes equity for the construction mortgage |
| Lot loan | Bank finances 50–75% of land value; higher rate than mortgages (prime + 2–4%); shorter term (1–5 years) |
| Vendor take-back (VTB) | Seller finances part or all of the purchase; negotiable terms |
| HELOC from existing home | Use equity in your current home to buy the land |
| Construction mortgage (single-close) | Some lenders include land purchase in the construction mortgage — one transaction from land to completion |
Step 2 — Planning and design
Design options and costs
| Option | Cost | Timeline | Best For |
|---|---|---|---|
| Stock plans | $1,000–$5,000 | Available immediately | Budget-conscious; standard layouts |
| Modified stock plans | $3,000–$10,000 | 4–8 weeks | Mostly standard with custom changes |
| Custom architect | $15,000–$80,000+ (8–15% of build cost) | 3–6 months | Fully custom, complex sites, unique designs |
| Design-build firm | Included in build contract | 2–4 months | One-stop shop; simpler process |
Permits and approvals
| Permit / Approval | Cost | Timeline |
|---|---|---|
| Building permit | $2,000–$15,000 (varies by municipality and square footage) | 2–8 weeks |
| Septic permit (rural) | $500–$2,000 | 2–6 weeks |
| Conservation authority approval | $500–$5,000 | 4–12 weeks |
| Site plan approval (some municipalities) | $1,000–$5,000 | 4–12 weeks |
| Development charges | $20,000–$80,000+ | Paid at permit issuance |
Step 3 — Construction mortgage
How construction mortgages work
Unlike a regular mortgage where you receive all funds at closing, a construction mortgage releases funds in stages called draws. You pay interest only on drawn amounts during construction.
Typical draw schedule
| Draw | Stage | % of Loan | Cumulative |
|---|---|---|---|
| 1 | Foundation complete | 15% | 15% |
| 2 | Framing and roof complete | 25% | 40% |
| 3 | Mechanical rough-in (plumbing, electrical, HVAC) | 20% | 60% |
| 4 | Drywall, insulation, interior finishes | 25% | 85% |
| 5 | Completion and occupancy | 15% | 100% |
Each draw requires an inspection (by the lender or their appraiser) to confirm the work is complete before funds are released.
Construction mortgage vs regular mortgage
| Feature | Construction Mortgage | Regular Mortgage |
|---|---|---|
| Disbursement | In draws (3–5 stages) | Full amount at closing |
| Payments during build | Interest-only on drawn amount | Principal + interest from day 1 |
| Rate | Usually prime + 1–2% (higher than standard) | Posted or discounted fixed/variable |
| Down payment | 20–25% of total project cost | 5–20% of purchase price |
| Inspection required | At each draw stage | One appraisal at purchase |
| Term | 12–24 months construction + conversion | 1–5 year term, 25 yr amortization |
| Availability | Limited — not all lenders offer these | All lenders |
Lenders offering construction mortgages
| Lender Type | Typical Terms | Best For |
|---|---|---|
| Credit unions (Meridian, Desjardins, etc.) | Most flexible; some offer insured construction mortgages | Best option for most custom builds |
| Big banks (limited programs) | Stricter criteria; may require contractor from approved list | Well-established builders with bank relationship |
| B-lenders | Higher rates (7–10%); more flexible on documentation | Non-standard projects, self-builds |
| Private lenders | 10–15%+ plus fees | Last resort; very expensive |
Down payment calculation
| Component | Amount |
|---|---|
| Land value (already owned) | $200,000 |
| Construction cost (from builder contract) | $500,000 |
| Soft costs (permits, design, contingency) | $80,000 |
| Total project cost | $780,000 |
| Required equity (25%) | $195,000 |
| Land equity applied | –$200,000 |
| Additional cash needed | $0 (land covers the down payment) |
If the land is worth less than 25% of the total project cost, you need to bring additional cash.
Interest cost during construction
| Month | Cumulative Draw | Interest Rate | Monthly Interest |
|---|---|---|---|
| Months 1–3 | $117,000 (Draw 1: 15%) | 7.5% | $731 |
| Months 4–6 | $312,000 (Draw 2: +25%) | 7.5% | $1,950 |
| Months 7–9 | $468,000 (Draw 3: +20%) | 7.5% | $2,925 |
| Months 10–11 | $663,000 (Draw 4: +25%) | 7.5% | $4,144 |
| Month 12 | $780,000 (Draw 5: +15%) | 7.5% | $4,875 |
| Total interest during construction | ~$30,000–$38,000 |
This is a carrying cost that many people forget to budget for.
Step 4 — Build costs
What does it cost to build a house in Canada?
| Quality Level | Cost Per Sq Ft | 2,000 Sq Ft Home | 3,000 Sq Ft Home |
|---|---|---|---|
| Basic / builder grade | $175–$250 | $350,000–$500,000 | $525,000–$750,000 |
| Mid-range / custom | $250–$400 | $500,000–$800,000 | $750,000–$1,200,000 |
| High-end / luxury | $400–$600+ | $800,000–$1,200,000+ | $1,200,000–$1,800,000+ |
Costs vary significantly by region, site conditions, and market conditions
Cost by region
| Region | Build Cost Per Sq Ft (mid-range) |
|---|---|
| GTA / Southern Ontario | $275–$400 |
| Greater Vancouver | $300–$450 |
| Ottawa | $250–$350 |
| Calgary / Edmonton | $225–$325 |
| Montreal | $225–$325 |
| Atlantic provinces | $200–$300 |
| Rural / remote | $200–$350 (lower labor, higher material transport) |
Build budget breakdown
| Category | % of Total | Example ($600K build) |
|---|---|---|
| Foundation & framing | 25–30% | $150,000–$180,000 |
| Roofing | 5–8% | $30,000–$48,000 |
| Mechanical (HVAC, plumbing, electrical) | 15–20% | $90,000–$120,000 |
| Interior finishes (drywall, flooring, paint, trim) | 15–20% | $90,000–$120,000 |
| Kitchen & bathrooms | 10–15% | $60,000–$90,000 |
| Exterior finishes (siding, windows, doors) | 10–12% | $60,000–$72,000 |
| Site work (excavation, grading, driveway) | 5–8% | $30,000–$48,000 |
| Contingency | 10–15% | $60,000–$90,000 |
Soft costs (often forgotten)
| Cost | Amount |
|---|---|
| Architectural/design fees | $15,000–$80,000 |
| Building permits and development charges | $22,000–$95,000 |
| Engineering (structural, geotechnical, civil) | $5,000–$20,000 |
| Survey | $1,500–$5,000 |
| Soil / environmental testing | $2,000–$8,000 |
| Legal fees | $1,500–$3,000 |
| Insurance during construction | $2,000–$5,000 |
| Interest during construction | $20,000–$50,000 |
| Utility connections (hydro, gas, water, sewer) | $5,000–$25,000 |
| Landscaping, driveway, final grading | $10,000–$50,000 |
| Total soft costs | $84,000–$341,000 |
Critical: Soft costs can add 15–25% on top of the construction contract. Budget for them separately.
Choosing a builder
Builder types
| Type | Description | Best For |
|---|---|---|
| Production builder | Builds from a library of pre-designed plans; volume-based pricing | Budget-conscious; faster timelines |
| Custom builder | Builds from your architect’s plans; fully custom | Unique designs; complex sites |
| Design-build firm | Handles design and construction in-house | Streamlined process; single point of responsibility |
| Owner-builder | You act as general contractor | Maximum control and cost savings; high time commitment |
What to look for in a builder contract
| Clause | What It Should Say |
|---|---|
| Fixed price vs cost-plus | Fixed price gives you cost certainty; cost-plus gives flexibility but less control |
| Allowances | Clearly defined dollar amounts for selections (flooring, fixtures, etc.) |
| Change order process | Written approval with price and timeline impact before any changes |
| Completion date | Specific date with consequences for delay (penalty clause) |
| Warranty | 1-year workmanship, 2-year mechanical, 7-year structural (Tarion in Ontario; New Home Warranty in other provinces) |
| Payment schedule | Tied to draw milestones, not calendar dates |
| Holdback | 10% holdback as required by provincial Construction Lien Act |
| Dispute resolution | Arbitration or mediation clause |
Cost overrun protection
| Strategy | How It Helps |
|---|---|
| Fixed-price contract | Builder absorbs cost overruns (within scope) |
| 15% contingency in budget | Your buffer for surprises and upgrades |
| Detailed specs before signing | Fewer change orders = fewer cost surprises |
| Avoid changes during construction | Even small changes cascade into significant cost and time impacts |
| Monitor draw schedule | Ensure spending aligns with progress; flag issues early |
| Independent inspections | Hire your own inspector at each stage — separate from the lender’s |
Total cost example
| Component | Amount |
|---|---|
| Land | $200,000 |
| Construction (2,500 sq ft mid-range) | $625,000 |
| Soft costs | $120,000 |
| Contingency (10%) | $62,500 |
| Total project cost | $1,007,500 |
| Down payment (25%, land equity covers it) | $200,000 (land) + $51,875 cash |
| Construction mortgage | $755,625 |
| Converted to permanent mortgage | $755,625 at market rate |