How to Convert Your Spare Room into a Rentable Room (And Start Earning)

A spare room is one of the most underused assets a homeowner or long-term tenant can have. Whether it's been storing boxes for three years or sitting empty since a flatmate moved out, converting it into a rentable space is one of the fastest and most practical ways to reduce your housing costs — or generate genuine income.

This guide walks through the process end to end: preparing the space, pricing it correctly, listing it effectively, and protecting yourself once someone moves in.

Step 1: Decide What Kind of Room You're Offering

Before you touch the room itself, be clear about what you're renting. This shapes every decision that follows.

Room in a share house — You remain in the property and the tenant becomes a flatmate. You share common areas (kitchen, bathrooms, lounge). This is the most common arrangement and gives you the most control over who lives with you.

Self-contained studio or granny flat — If the room or converted space has its own entrance, kitchen facilities, and bathroom, it may qualify as a separate dwelling. This carries different legal obligations in both Australia and New Zealand (building consents, separate tenancy agreements, higher bond requirements).

Most first-time room renters are in the first category — renting a bedroom in their home to one or two flatmates. That's what this guide focuses on.

Step 2: Prepare the Room Properly

A cluttered, bare, or poorly maintained room will receive far fewer enquiries than one that is clean, functional, and well-presented. You don't need to spend a lot — but you do need to spend intentionally.

Clear and deep clean

Remove all personal items, boxes, and furniture that won't be staying. Wipe down every surface, clean windows, shampoo carpet or mop floors. Pay attention to corners, skirting boards, and ceiling cobwebs — these are the details applicants notice in photographs and at inspection.

Assess the furniture situation

Furnished rooms rent faster and for more money in most markets, particularly for short-to-medium term stays. The minimum a good furnished room needs:

• A bed (queen is preferred; single limits your applicant pool significantly)
• A mattress in good condition — this matters more than most landlords realise
• Bedside table and lamp
• A wardrobe or built-in with sufficient hanging space
• A desk and chair if the room size allows

You don't need to buy everything new. Second-hand furniture from Facebook Marketplace or Trade Me is entirely fine — provided it's clean and structurally sound.

Fix what's broken

Stuck drawers, broken blinds, faulty power points, and dripping taps are all reasons a tenant either won't apply, or will deduct from your rent in their head before they even enquire. Fix these before listing. Minor repairs cost almost nothing and have an outsized effect on applicant quality and rent achieved.

Check lighting

A well-lit room photographs well and feels larger. Replace blown bulbs. If the room is naturally dark, consider adding a standing lamp or warm-toned lighting to make the space more welcoming.

Step 3: Work Out the Common Areas

Shared living works when common areas are functional, clean, and clearly managed. Before a flatmate moves in, assess your kitchen, bathroom, and living spaces honestly.

Kitchen: Make sure there's adequate fridge space, pantry space, and bench space for an additional person to cook. If you have limited storage, having a direct conversation about how it will be shared prevents resentment later.

Bathroom: One bathroom between two people is fine; one bathroom between four people is a friction point. If you only have one bathroom, consider whether the room is priced to account for that limitation.

Internet: A strong, reliable internet connection is non-negotiable for most tenants today. If yours is patchy or slow, upgrading before you list is worth it — it's also a genuine selling point.

Laundry: Confirm whether the flatmate will have access to the washing machine and dryer, and set expectations about timing or scheduling up front.

Step 4: Price the Room Correctly

Pricing is the single biggest factor in how quickly your room fills. Too high and it sits empty (costing you more in vacancy than you'd have gained in rent). Too low and you undersell the asset and attract enquiries from people who wouldn't pass a reference check elsewhere.

Use real data rather than guesswork. The What Is My Room Worth? tool on Flathive shows average weekly rent for rooms in your suburb based on live listings — enter your suburb or postcode and you'll see the current range in your area within seconds.

General pricing principles:

• Price within 5–10% of the suburb average to attract volume
• Price above average only if you can justify it with specifics: large room, ensuite, off-street parking, bills included, close to a train line
• Bills-included pricing (where you fold internet and utilities into the rent) is increasingly preferred by tenants and reduces the administrative burden of splitting accounts

For the first listing in your suburb, err slightly below average until you've established your own review history and rental track record.

Step 5: Take Photos That Show the Room at Its Best

Your photos are your listing. Applicants who don't connect with your photos won't enquire — regardless of how good the room actually is.

Photo checklist:

• Make the bed properly with clean linen (white or neutral tones photograph best)
• Open curtains and blinds to maximise natural light
• Shoot from the corner of the room to capture the most space in a single frame
• Include at least one photo of the bathroom, kitchen, and any outdoor area
• Shoot horizontally (landscape orientation) — vertical photos display poorly on most listing platforms

You do not need a professional camera. A modern smartphone in good light is sufficient. Flathive also offers an AI photo enhancement tool that can improve the quality of standard phone shots before you publish.

Step 6: Write a Listing That Answers the Key Questions

A good listing doesn't describe the room in exhaustive detail — it anticipates what a prospective flatmate needs to know to decide whether to enquire.

What to include in your listing:

• Room size and furnishings — Is it large, medium, or compact? What furniture is included?
• Bills — Are utilities included in the rent? Which ones? What about internet?
• Parking — Is there off-street parking? Is there a garage?
• Transport — What's the nearest bus or train, and how far is it?
• About the household — How many people currently live there? What's the general vibe (quiet professional, social, mixed)?
• Availability date — When can someone move in?
• Minimum stay — Are you looking for someone for 3+ months, or are you open to shorter stays?

Be direct about your preferences. If you want a non-smoker, a professional, or someone without pets, say so clearly in the listing rather than discovering incompatibilities at the inspection stage.

Step 7: Screen Applicants Thoughtfully

Receiving enquiries is exciting. Choosing the wrong flatmate is expensive. Build a simple screening process and apply it consistently.

First message: Note whether the applicant introduced themselves properly or sent a one-line generic message. The quality of their first message often reflects the quality of the applicant.

Phone or video call: Before offering an inspection, have a 10-minute call. You'll learn far more from a conversation than from a written message. Listen for clarity about their situation, move-in timeframes, and what they're looking for in a household.

Inspection: Show them the room, the common areas, and be direct about house rules and expectations. Watch whether they are on time, how they engage with the space, and whether they ask thoughtful questions.

Reference check: Ask for the name and contact details of a previous landlord or property manager. Call them. A quick five-minute call with a previous landlord is the most reliable signal of a tenant's reliability.

Step 8: Set Up a Written Agreement

This step is skipped more often than any other — and it's the one you'll most regret if things go wrong.

A written flatmate or room-rental agreement doesn't need to be long or legally complex. It does need to cover:

• The weekly rent amount
• The bond amount and who holds it
• The notice period required by either party to end the arrangement
• House rules (smoking, pets, overnight guests, noise)
• How utilities and internet are split (if not included in rent)
• The process if rent is paid late

In New Zealand, if your flatmate is a tenant (on the lease or paying rent directly to a landlord or property manager), the Residential Tenancies Act applies. If they're a flatmate (paying rent to you, the head tenant, in a private arrangement), the RTA may not fully apply — which makes a written flatmate agreement all the more important.

Flathive provides digital rental agreement templates you can complete and send for e-signature directly through the platform. It takes about five minutes and creates a legally sound record for both parties.

Step 9: Handle the Bond Correctly

Even in a flatmate arrangement, collecting a bond is strongly recommended. It provides a financial buffer if rent is unpaid or if there is damage to your property.

A standard bond is two to four weeks' rent. Agree on the amount before the flatmate moves in, collect it before or on the move-in date, and document it in your written agreement.

In New Zealand: If the arrangement is covered by the Residential Tenancies Act, the bond must be lodged with Tenancy Services. For private flatmate arrangements outside the RTA, holding the bond yourself is common — but be transparent about this with your flatmate and document it clearly.

In Australia: Each state has its own bond authority. If you are the landlord (not a head tenant), you are generally required to lodge bonds with the relevant state body.

Step 10: Maintain the Relationship

The best outcome — for both you and your flatmate — is a long, stable, low-friction tenancy. This is almost entirely determined by how you set expectations at the start and how you handle issues when they arise.

What tends to work well:

• A brief conversation (in person or via message) in the first week to check whether everything is working
• A clear, consistent way to raise issues — most flatmate tensions escalate because small irritations go unspoken until they become major ones
• Prompt maintenance: if something breaks, fix it quickly. A landlord who responds fast earns goodwill and retains good tenants for longer.

What tends to cause problems:

• Vague house rules that are interpreted differently by different people
• Disagreements over utilities when the split wasn't agreed in writing
• Landlords who are excessively present or who don't give the flatmate reasonable privacy in their own space

A good flatmate relationship runs almost on autopilot once it's established correctly. The investment of care at the beginning pays dividends for the length of the tenancy.

How Much Can You Actually Earn?

To give you a concrete sense of the numbers, here is what a spare room currently earns across major cities based on live Flathive listings:

At $290 per week in Wellington, a year of renting out a spare room generates approximately $15,000 in additional income before tax. Even at the lower end of the market, a spare room covering part or all of your mortgage or rent is a material financial outcome.

Quick-Reference Checklist

Ready to List?

A spare room is a sleeping asset. Setting it up to rent doesn't require a renovation or a real estate background — it requires a clean space, clear communication, and a listing that accurately represents what you're offering.

List your room on Flathive — it takes about five minutes, and your listing will be visible to thousands of verified flatmate seekers in your area.

Not sure what to charge? Use the What Is My Room Worth? tool to get a data-driven rent estimate for your suburb before you publish.