Most Melbourne granny flat investors face the same anxious questions. What if tenants leave unexpectedly? What if I can’t find replacement tenants quickly? What if they stop paying rent? These aren’t theoretical concerns. They’re real risks that cost landlords thousands in lost income every year.
Granny Flat Rental Guarantee Melbourne: The Investment Protection Every Landlord Wishes They Had
Innovista Group has eliminated these risks entirely with Australia’s first comprehensive 5-year rental guarantee for granny flat investments. Your income is protected from day one, regardless of tenant vacancies, payment defaults, or market conditions. Here’s exactly how it works and why it changes the investment equation completely.
The Problem Every Granny Flat Investor Faces
You’ve just spent $190,000 building a quality granny flat. The rental appraisal suggests $450 per week. Your investment calculations look promising. Then reality hits.
Month 3: Your tenant gives notice. You lose two weeks finding a replacement.
Month 8: New tenant falls behind on rent. You lose another month dealing with VCAT and eviction.
Month 14: Property sits vacant for three weeks between tenants.
By year two, you’ve lost $8,000 to $12,000 in rental income that your original calculations never accounted for. Your investment returns have dropped from 8% to 5%, and you’re stressed about cash flow every time the phone rings.
This is the hidden cost of granny flat investing that no one warns you about. Until now.
How Innovista’s 5-Year Rental Guarantee Actually Works
Our rental guarantee isn’t insurance you pay for. It’s not a backup plan. It’s a contractual commitment that protects your investment income for five full years from completion.
The Guarantee Floor System
Your granny flat receives two rental figures:
Market Rate: What your property should achieve in normal rental conditions (e.g., $450/week based on location, quality, and demand).
Guarantee Floor: The minimum weekly income we contractually guarantee regardless of circumstances (e.g., $400/week).
When things work normally, you earn the market rate. When tenant issues arise (vacancies, defaults, damage disputes), you still receive the guarantee floor. You never drop below that protected minimum for the entire five years.
What’s Actually Covered
The guarantee covers every rental income disruption scenario:
Tenant vacancies between leases (including the inevitable gaps that most landlords face)
Rent payment defaults when tenants stop paying or fall behind
Eviction periods while you’re pursuing VCAT processes
Extended vacancy if the market softens temporarily
Damage disputes when bond doesn’t cover repairs and you can’t re-let immediately
Essentially, anything that would normally interrupt your rental income is absorbed by the guarantee. You receive consistent, predictable cash flow regardless of tenant circumstances.
The Real Numbers: What This Means for Your Investment
Let’s compare two identical granny flat investments over five years.
Standard Investment (No Guarantee)
Initial cost: $190,000
Expected rent: $450/week
Actual collected rent over 5 years:
- Year 1: $21,600 (2 weeks vacancy)
- Year 2: $19,800 (6 weeks lost to tenant default)
- Year 3: $22,050 (1 week vacancy)
- Year 4: $20,700 (4 weeks vacancy)
- Year 5: $21,150 (3 weeks vacancy)
Total collected: $105,300
Lost income: $12,000+ (16 weeks total disruption)
Innovista Guaranteed Investment
Initial cost: $190,000
Guarantee floor: $400/week
Market rent: $450/week when tenanted
Actual income over 5 years:
- Year 1: $20,800
- Year 2: $20,800 (absorbs defaults)
- Year 3: $20,800
- Year 4: $20,800 (absorbs vacancies)
- Year 5: $20,800
Total guaranteed: $104,000
Plus market rate premiums when tenanted: $7,000-$10,000
Total received: $111,000-$114,000
Lost income: $0
The guaranteed investment delivers $6,000 to $9,000 more income over five years whilst eliminating all stress and uncertainty. That’s the difference between theoretical returns and actual returns.
**Rental Income Projections Disclaimer:** All rental income figures, market rates, and guarantee amounts mentioned in this article are examples for illustrative purposes only and do not represent guaranteed outcomes for any specific property. Actual rental income, market rates, and guarantee floor amounts vary significantly based on property location, granny flat design, local market conditions, property presentation, and numerous other factors. The rental income comparisons presented are hypothetical scenarios designed to demonstrate how the guarantee functions and should not be interpreted as predictions or promises of actual investment returns. Your specific rental guarantee amount will be determined through a professional rental appraisal conducted by Certainty Property based on your exact property address and chosen granny flat design. Rental markets fluctuate, and conditions can change due to economic factors, local supply and demand, regulatory changes, and other variables beyond anyone’s control. Always obtain a property-specific rental appraisal before making investment decisions.

Eligibility Requirements: Who Qualifies
The rental guarantee is available to investment property owners who meet specific criteria designed to ensure the guarantee can be effectively managed.
Investment Property Only
Your property must be held purely for investment purposes, not owner-occupied. This is because effective property management requires consistent, professional oversight of both dwellings.
Property Management by Certainty Property
Certainty Property (our licensed property management partner) must manage both your primary dwelling and granny flat. This integrated management approach ensures consistent tenant quality, faster vacancy resolution, and streamlined maintenance coordination.
Physical Separation and Independent Access
The granny flat must have physical separation from the primary dwelling (typically a fence) and completely separate access. This prevents tenant conflicts and clarifies responsibility boundaries that protect both tenants and your guarantee coverage.
Separate Utility Metering
The granny flat requires separate electricity, water, and gas meters. This eliminates disputes over utility costs, simplifies tenant management, and ensures accurate expense tracking that supports your investment returns.
These requirements aren’t arbitrary. They’re the proven conditions that allow professional property management to deliver consistent, protected rental income year after year.

How to Get Your Personalised Rental Guarantee
Every property and granny flat design combination achieves different rental returns. Your guarantee amount is customized based on several factors.
Step 1: Choose Your Granny Flat Design
Select from Innovista’s complete range:
- Affordable 60 Signature ($190,000)
- Affordable 60 Luxe ($205,000)
- Lana 60 Signature ($230,000)
- Lana 60 Luxe ($255,000)
- Lana 43 Signature ($220,000)
Premium inclusions and larger sizes typically command higher rents and therefore higher guarantee floors.
Step 2: Provide Your Property Address
Location dramatically affects rental demand and achievable rates. A granny flat in Craigieburn achieves different rent than the same design in Frankston or Werribee. Your address determines your specific rental market conditions.
Step 3: Receive Your Detailed Rental Appraisal
Certainty Property conducts a comprehensive rental appraisal specific to your property and chosen design. You’ll receive:
- Expected market rate (what the property should rent for)
- Guaranteed floor rate (your protected minimum)
- Detailed rental analysis based on local comparables
- Complete guarantee terms and conditions
This appraisal is obligation-free. You can review the numbers before committing to anything.
Step 4: Build with Complete Income Protection
Once you proceed, your granny flat construction begins with full confidence. Even during the 16-20 week build period, you know exactly what your rental income will be for the next five years. No surprises, no risk, no uncertainty.
Why This Guarantee Changes the Investment Equation
Traditional granny flat investments carry inherent uncertainty. You’re calculating returns based on assumptions: that you’ll find tenants quickly, that they’ll pay reliably, that vacancies will be minimal. But assumptions aren’t guarantees.
Eliminates Vacancy Risk
The average Melbourne rental property experiences 3-6 weeks of vacancy annually. Over five years, that’s potentially 15-30 weeks of lost income. The guarantee absorbs all vacancy losses.
Removes Default Risk
Tenant rent defaults cost Victorian landlords an estimated $15,000 on average (including lost rent, legal fees, and damage). The guarantee covers all default scenarios completely.
Provides Financing Confidence
When approaching lenders for investment property financing, guaranteed rental income strengthens your serviceability calculations. Banks view guaranteed cash flow more favourably than projected cash flow.
Enables Accurate Financial Planning
You can calculate your investment returns with certainty. No “best case” versus “worst case” scenarios. Just a single, guaranteed number that you receive every week for five years.
Reduces Investor Stress
Property investment shouldn’t mean constant anxiety about tenant problems. The guarantee removes that stress entirely. You receive your weekly income regardless of what’s happening with tenants.
What Happens After Five Years
The guarantee protects your investment during the critical early years when most income disruptions occur. After five years, several things typically happen:
Established Rental History
Your granny flat has five years of documented rental performance, making future tenant acquisition easier and faster.
Higher Market Rents
Melbourne rental rates typically increase 3-4% annually. After five years, your market rent has likely increased from $450 to $520-$550 per week.
Proven Investment Asset
You’ve received consistent, reliable income for five years. Your investment has proven itself and likely increased in value alongside your property.
Continued Professional Management
If you choose to continue with Certainty Property (most investors do), you benefit from established relationships, maintained property standards, and professional management without the guarantee coverage.
The guarantee isn’t a short-term gimmick. It’s designed to protect you through the riskiest period of rental property ownership and position you for long-term success.

Why Innovista Offers This When Others Don’t
No other Melbourne granny flat builder offers anything remotely comparable to this guarantee. There’s a specific reason why.
We Build Quality That Lasts
The guarantee works because our construction quality ensures minimal maintenance issues, consistent tenant satisfaction, and strong rental demand. Budget builds with failing fixtures can’t support rental guarantees because they generate constant problems.
We Partner with Specialist Managers
Certainty Property’s expertise in secondary dwelling management means they can effectively maintain occupancy and handle issues quickly. General property managers lack this specialized capability.
We’re Confident in Our Product
The guarantee demonstrates our confidence in both construction quality and rental demand for our granny flats. We wouldn’t offer this protection if we weren’t certain our product performs.
We Understand Investor Needs
Most builders focus on construction. We focus on investment outcomes. The guarantee exists because investors need income certainty, not just construction completion.
Getting Started: Your Protected Investment Journey
If you’re considering a granny flat investment, the rental guarantee eliminates the biggest risks you’d otherwise face.
Step 1: Book a free site assessment to determine your property’s suitability for a granny flat.
Step 2: Choose your preferred granny flat design from our complete range.
Step 3: Provide your address to receive your personalized rental guarantee appraisal from Certainty Property.
Step 4: Review your guaranteed income projection and decide if the investment meets your requirements.
Step 5: Proceed with construction knowing your rental income is protected for five full years from completion.
The guarantee costs you nothing to explore. The rental appraisal is obligation-free. You can see exactly what your protected income will be before committing to anything.
The Bottom Line on Guaranteed Rental Income
Granny flat investments offer exceptional returns when executed properly. The challenge has always been the inherent uncertainty of rental income. Vacancies, defaults, and tenant issues erode returns and create stress that many investors aren’t prepared for.
Innovista’s 5-year rental guarantee eliminates that uncertainty completely. Your investment income is protected from day one, regardless of tenant circumstances or market conditions. You receive consistent, predictable cash flow for five full years whilst benefiting from professional property management that maximizes long-term performance.
This isn’t available from any other Melbourne builder. It’s the investment protection that every granny flat investor deserves but rarely receives.
Get your personalized rental guarantee appraisal and discover exactly what your protected income will be.