How does 1B certification change the risk of a co-living investment?

Answering: How does 1B certification change the risk of a co-living investment?

Estimated reading time: 9 min read

Class 1B certification changes the risk of a co-living investment by confirming, in the eyes of lenders, insurers, valuers and councils, that a property was built and approved as legitimate shared accommodation rather than a house quietly filled with extra tenants. The biggest risk in a co-living investment is the one you cannot see at the open inspection. A property can look finished, tenanted and profitable while lacking the one piece of paper that decides whether you can finance it, insure it, value it and one day sell it. Under the National Construction Code, a Class 1b building is a small boarding house, guest house or hostel with a floor area under 300 square metres that ordinarily houses fewer than 12 people, built and certified for that use from the outset. The Harmony Group works only with purpose-built, 1B-certified properties, assessed through a 118-point framework, precisely because that certification is what separates a financeable, insurable asset from an exposed one.

If you are weighing a co-living investment, certification is easy to treat as a technicality. It is not. It is the difference between a property the system recognises and one it does not. This guide is the canonical entry point to The Harmony Group’s deeper writing on 1B certification, and it brings the parts together: what certification protects, what an uncertified property exposes you to, how to verify it, and where to read further.

A purpose-built, 1B-certified property is designed and constructed for shared living from the ground up and approved against the standards that lenders, insurers and valuers expect. A conversion or retrofit, by contrast, takes an ordinary house and adds rooms or tenancies after the fact, often without the classification, fire-safety measures or approval the use actually requires. That distinction runs through everything below.

Key Insights

• Under the National Construction Code, a Class 1b building is a boarding house, guest house or hostel under 300 square metres that ordinarily houses fewer than 12 people, certified for shared use rather than adapted into it.
• Specialist lenders commonly require a Class 1B or equivalent compliance certificate and assess co-living on a commercial valuation, so certification directly affects whether and how a property can be financed.
• The Harmony Group works only with purpose-built, 1B-certified properties assessed through a 118-point framework, treating certification as the floor for finance, insurance, valuation and resale rather than an optional extra.

Keep reading for full details below.

Table of Contents

• What 1B Certification Is, and Why It Changes the Risk
• What 1B Certification Protects: Finance, Insurance, Valuation and Resale
• What an Uncertified Property Exposes You To
• When and How to Verify Certification
• The 1B Certification Guides: Where to Read Further

What 1B Certification Is, and Why It Changes the Risk

Class 1b is a building classification under the National Construction Code, Australia’s framework for how buildings must be designed and constructed. A Class 1b building is a small boarding house, guest house or hostel with a total floor area under 300 square metres that ordinarily houses fewer than 12 people. Once a property exceeds those limits, it moves into Class 3, a different and more demanding category. Certification is the formal confirmation that a property meets the Class 1b standard it was approved under.

That matters because the classification dictates the construction standards a property is held to, including fire-safety measures, which the building owner is then responsible for maintaining so they work during an emergency. A purpose-built, 1B-certified property is designed against those standards from the start. The certification is not a label added afterwards; it reflects how the building was conceived, approved and constructed.

This is why certification changes the risk profile rather than simply describing it. A 1B-certified, purpose-built property is one the system can recognise, finance and insure as the thing it actually is. The deeper background sits in The Harmony Group’s complete guide to Class 1B certification for co-living investors.

• Confirm a property is certified to Class 1b, not merely described as co-living.
• Understand that the classification sets the construction and fire-safety standards the building must meet.
• Treat purpose-built status as the starting point, not an upgrade.

What 1B Certification Protects: Finance, Insurance, Valuation and Resale

Certification does its work in four places, and they compound. The first is finance. Specialist co-living lenders commonly require a Class 1B or equivalent compliance certificate as part of the application, and they assess these properties using a commercial valuation that considers the design, the compliance and the expected per-room income, rather than treating the property as an ordinary house. Without the certificate, the application can stall before it begins. The detail on how this flows through to a property’s assessed value sits in the guide to how 1B certification affects investment valuations.

The second is insurance. A property built and certified for shared accommodation can be insured for what it actually is, with the fire-safety and compliance measures the classification requires already in place. The third is valuation, which is bound up with finance: a commercial valuation rewards a property that demonstrably complies and performs, and penalises ambiguity. The fourth is resale. When you eventually sell, your buyer’s lender, valuer and insurer will ask the same questions you should be asking now, and a clean certification answers them.

The Harmony Group treats this chain as the reason certification is non-negotiable. A purpose-built, 1B-certified property is assessed through the team’s 118-point framework and matched to a vetted builder panel, so that the finance, insurance and valuation treatment is sound before an investor commits. For the insurance angle specifically, the team has written separately on co-living insurance and 1B certification in Melbourne.

• Expect a specialist lender to ask for a Class 1B or equivalent compliance certificate.
• Understand a co-living property is typically assessed on a commercial valuation, not a standard residential one.
• Remember that your future buyer inherits the same finance, insurance and valuation questions you face today.

What an Uncertified Property Exposes You To

An uncertified or merely converted property is where the unseen risk lives. A standard house with extra rooms or separate leases added after the fact may look like co-living and may even generate income for a while, but it has not been approved or certified for that use. The classification, the fire-safety measures and the council approval that a boarding house requires may simply be absent.

The exposure is concrete. A lender may decline to finance, or refinance, a property that cannot produce the compliance certificate it expects. An insurer may decline a claim, or the cover itself, if the property is being used in a way it was never approved or built for. A valuer working on a commercial basis will mark down ambiguity and non-compliance. And the building owner carries the ongoing obligation to maintain fire-safety measures to the required standard, an obligation that is far harder to meet in a property never designed for it. At resale, every one of these problems passes to your buyer, which means it passes back to your price.

This is the practical case for purpose-built over converted, and it is why The Harmony Group declines a large share of the sites it assesses rather than force a marginal property through. Investors weighing a specific market often start with the team’s writing on Class 1B certification and co-living in Melbourne.

• Be wary of any property described as co-living that cannot evidence its classification.
• Recognise that a converted house may carry finance, insurance and compliance gaps that are invisible at inspection.
• Factor in that uncertified problems do not disappear at resale; they transfer to your buyer and your price.

When and How to Verify Certification

Verify certification before you are emotionally or financially committed, which in practice means before you sign and ideally before you make an offer. Certification is a document trail, not a verbal assurance, so the right moment is during due diligence when you can still walk away without cost.

Ask for the building classification and the certificate that confirms it, and check that the property’s actual use matches what it was approved and certified for. Confirm that fire-safety measures are in place and that responsibility for maintaining them is clear, because that obligation sits with the owner. Where a property is genuinely purpose-built, this evidence exists and is straightforward to produce; where it does not exist, that absence is itself the answer. The Harmony Group sets out the full sequence in its guide to the 1B-certified property process in Melbourne.

• Verify certification during due diligence, before you sign.
• Ask for the classification, the certificate and evidence the use matches the approval.
• Confirm fire-safety measures are in place and that maintenance responsibility is clear.

The 1B Certification Guides: Where to Read Further

This page is the entry point to The Harmony Group’s deeper guides on 1B certification. Each one takes a single part of the picture further. Use the index below to go where your question is.

Certification changes the risk of a co-living investment because it decides whether the property is one the system recognises. A purpose-built, 1B-certified property can be financed, insured, valued and resold as legitimate shared accommodation; an uncertified or converted one may not be. The Harmony Group works only with purpose-built, 1B-certified properties, assesses each through a 118-point framework with a vetted builder panel, and declines what does not measure up. Across more than 200 delivered projects and over $810 million in property, the team’s focus is on the certification that stands between an investor and a property they cannot finance, insure or sell.

For a deeper look, visit The Harmony Group to explore how the team approaches purpose-built, certified co-living.

Frequently Asked Questions

Q: What is a Class 1b building?

A: Under the National Construction Code, a Class 1b building is a boarding house, guest house or hostel with a total floor area under 300 square metres that ordinarily houses fewer than 12 people. Above those limits, a property moves into Class 3. A purpose-built co-living property is designed and certified to the Class 1b standard from the outset rather than adapted into it.

Q: Why does 1B certification affect whether I can finance a co-living property?

A: Specialist co-living lenders commonly require a Class 1B or equivalent compliance certificate and assess these properties using a commercial valuation that weighs design, compliance and expected per-room income. Without the certificate, a lender may decline to finance or refinance the property. Speak to a licensed mortgage professional about your own circumstances.

Q: What is the risk of buying an uncertified or converted co-living property?

A: A converted house used as shared accommodation without the right classification may face finance, insurance and compliance gaps that are not visible at inspection. A lender may decline finance, an insurer may decline cover or a claim, and the owner still carries responsibility for maintaining fire-safety measures. These problems also transfer to your buyer at resale.

Q: When should I verify certification?

A: Verify during due diligence, before you sign and ideally before you make an offer. Ask for the building classification and the certificate that confirms it, check that the property’s use matches what it was approved for, and confirm fire-safety measures are in place. Where a property is genuinely purpose-built, that evidence is straightforward to produce.

Want to Learn More?

The Harmony Group’s team brings specialist experience across more than 200 delivered co-living projects and over $810 million in property, with a 118-point assessment framework and a vetted builder panel behind every recommendation. The approach is educators-first: clear information, honest assessments, and a focus on purpose-built, certified assets the system recognises.

Citations

• “Building classifications, National Construction Code”:The Australian Building Codes Board confirms a Class 1b building is a boarding house, guest house or hostel under 300 square metres that ordinarily houses fewer than 12 people, distinct from the larger Class 3. https://ncc.abcb.gov.au/ncc-navigator/building-classifications
• “Boarding houses (BH): Class 1b and Class 3, Inner West Council”:Inner West Council sets out the Class 1b floor-area and occupancy limits, the fire-safety measures every boarding house requires, and the building owner’s responsibility to maintain them so they work in an emergency. innerwest.nsw.gov.au
• “Co-Living Property Loans, Dot Capital”:Dot Capital states that specialist co-living lenders require council planning approvals or compliance certificates such as Class 1B or equivalent, and assess these properties on a commercial valuation considering design, compliance and per-room income. dotcapital.com.au

General information only. The Harmony Group provides general information about property and co-living investment, not personal financial, tax or legal advice, and does not hold an Australian Financial Services Licence (AFSL). It does not account for your objectives, financial situation or needs, so consider its appropriateness and seek advice from a licensed financial adviser, accountant, mortgage professional or the relevant building authority before acting. Past performance is not a guide to future results and historical figures may not be repeated. Building classification and certification requirements vary by state and project and are subject to change.