Renovation ROI – Calculate Your Return
Model how valuation uplift and rent improvement stack against renovation costs to evaluate the investment case.
Renovation ROI Calculator
Understanding Renovation Returns
Renovation ROI combines two value sources: immediate valuation lift and ongoing rental income improvement. Timing matters—immediate uplift benefits refinancing decisions, while rent improvement compounds over the hold period.
- Valuation uplift: A $85k bathroom + kitchen reno typically adds $90–120k to property value in metropolitan markets, depending on starting condition and suburb desirability.
- Rent improvement: Quality renos often justify +$30–60/week rent. Less is better than claiming too much—vacancy is the killer of ROI.
- Holding costs: Maintenance, rates, insurance, and vacancy erosion in year 1. Budget conservatively.
- Loan cost: If borrowed, your interest on $85k at 6% for 5 years = ~$14.2k. Subtract this from gross uplift.
Three Real Scenarios
Scenario 1: Metro unit ($550k base)
Facts: Tired Sydney 2-bed. Cosmetic reno ($70k) adds $55k value, rent from $520 to $580/week (+$60).
Year 1 calc: Value gain $55k + ($60 × 52 - vacancy) - $10k costs = $32k net gain, 46% ROI. Over 5 years: $55k + ($60 × 260 - $50k vacancies/costs) = ~$65k cumulative benefit.
Lesson: Unit renos can work well in tight rental markets; focus on cosmetics that drive rent fast.
Scenario 2: Regional house rebuild ($420k base)
Facts: Townsville rental house. Full reno including roof, kitchen, bathrooms ($95k) adds $78k value, rent from $380 to $440/week (+$60).
Year 1 calc: Value gain $78k + ($60 × 50 weeks, accounting for 2-week turnover) - $12k costs = $66k net, 69% ROI. 5-year cumulative: $78k + ($60 × 250) = ~$93k.
Lesson: Regional markets reward thorough renos; rent uplift is slower to realise but more durable once tenants settle.
Scenario 3: Overcapitalized reno failure ($680k base)
Facts: Premium inner-city house. $180k luxury overhaul adds only $120k value, rent rises from $680 to $720/week (+$40).
Year 1 calc: Value gain $120k + ($40 × 50) - $15k = $125k. Seems OK, but carrying 20% of cost overrun. 5-year: $120k + ($40 × 250) = $130k. Cost of borrowing $180k at 6% over 5 years = ~$29.8k. Real return: $130k - $30k = $100k on $180k = 56% total, or 9% annualised. Beat market, but narrow margin.
Lesson: Premium suburbs have rent caps; oversizing the reno erodes margins. Stick to market-rate aesthetics.
Using Renovation ROI in Your Strategy
- Before commit: Run reno quotes and test rent assumptions with your PM on comparable tenancies.
- Budget variance: Add 15–20% contingency to all reno budgets; they rarely finish on plan.
- Vacancy risk: If current market vacancy is >3 weeks, be cautious on assuming full 52-week tenancy post-reno.
- Tax deduction: ATO depreciation rules allow capital works deduction (up to 40 years). Separate site costs, building shell, plant & equipment before reno to lock in your base for future claims.
- Loan decision: If borrowing, ensure ROI > interest cost + vacancy buffer. A 40% gross ROI becomes 8% net after 6% borrowing cost.
- Timing: Avoid renos mid-lease if current tenant is stable; absorb exit risk and turnover costs first.
Mint Takeaway
Renovation ROI is real—if you execute discipline. The difference between a 8% annualised return and a 2% return is often contingency spending and vacancy misforecasting. Model conservatively, lock rent testing with your PM, and build 15% cost buffer into every quote. Good renos keep your portfolio resilient.