Guide
Small projects that hold their value in a slow market
Not every block needs a $900k build, and most owners can't fund one this cycle anyway. This is the list we'd put in front of a client with a block, some equity and a sensible appetite.
The short version
With the cash rate at 4.35% and Sydney values 7% off their peak, "do nothing" is the default. It doesn't have to be. These are projects that are small enough to finish inside the cycle, hold their value, and leave you in a better position than waiting — and the good small builders, certifiers and councils in our patch all have capacity for them right now.
| Project | Cost | Approval time | What you need |
|---|---|---|---|
| Granny flat by CDC | $180–280k all-in | Weeks | R2 lot of 450 m² or more |
| Alterations and additions by CDC | $100–150k; $300–500k for a second storey | Weeks | Stays inside the Housing Code |
| Subdivide an existing dual occ | Survey, application and plan registration | Months, no builder | Built and approved dual occupancy on one title |
| Building Information Certificate | Usually a few thousand dollars | Weeks to months | Unapproved deck, conversion or bathroom |
| Commercial change of use or fit-out | Varies with the use | 63–83 council days | Shop, office, warehouse or tenancy |
| Buy the approval for the big one | $12–45k all-in | Held for five years | A new home or duplex you can’t fund this cycle |
Figures are indicative, all-in and before land, current at September 2026. Run your own on the cost estimator.
1. A granny flat, by complying development
The default first project of 2026. A two-bed 60 m² secondary dwelling is $180–280k all-in — build $180–260k turnkey, design and CDC documentation from $4,300 plus consultants, council contributions $0–20k depending on the LGA, site works from $15k.
On most R2 blocks of 450 m² or more it's a CDC under the Housing SEPP: a private certifier rather than council, weeks rather than months, no neighbour notification. It's a new dwelling under the post-May 2026 negative gearing rules (confirm with your accountant), and it's the size of job builders are keen to price properly while their order books are thin.
What pushes a granny flat out of CDC and into a DA: a flood or bushfire overlay, a lot under 450 m², a heritage item, or a design that breaches the Code's setbacks or height. The granny flat guide covers the rules and the "60 m²" myth.
2. Alterations and additions, by complying development
$100–150k of alterations and additions is the most common renovation budget we see. It covers a rear extension of 30–40 m² at $2,500–4,500/m² for a new kitchen and living opening to the yard, or a full internal reconfiguration — walls out, new kitchen, two bathrooms — without adding floor area. $300–500k covers a second-storey addition of 80–120 m².
If the work stays inside the Housing Code — setbacks, height, site coverage, landscaped area — it's a CDC, approved in weeks, documented from $4,300–4,800 plus a certifier. If it steps outside, a DA for alts and adds is one of the cheaper ones to run (from $4,800 for our part).
Two traps. Alts and adds are where undocumented old work gets discovered, so check the existing approvals before you design. And if there's any chance of a granny flat later, don't build the extension into the only place it could go. Pathways are in the renovating and extending guide.
3. Subdividing what you already have
If you own an approved and built dual occupancy on a single title, the Torrens or strata subdivision is largely a paper exercise that turns one asset into two — two titles, two things you can sell, refinance or hold separately. It's cheap relative to any build, it's slow (survey, subdivision certificate, plan registration), and you want it done before you need it, not when a sale or a refinance is waiting on it.
The same logic applies to a large lot with an existing dwelling that could support a battle-axe subdivision: the subdivision is the project, and it doesn't need a builder.
4. Cleaning up unapproved work
The deck the previous owner built. The garage that's been a bedroom since 2009. The bathroom that never had a certificate. In a hot market buyers overlook these; in a slow one, their conveyancer doesn't, and neither does the bank's valuer at refinance.
The fix is a Building Information Certificate. Council inspects and, if the work is structurally sound and doesn't create a problem it can't live with, issues a certificate that prevents it from ordering demolition or taking action for seven years. It doesn't make the work "approved"; it makes it safe from enforcement, which is what the buyer and the bank actually need. Cost is council's fee (set by floor area), a survey if boundaries matter, sometimes a structural engineer's letter, and our part in preparing the drawings and the application — usually a few thousand dollars, more if the work needs upgrading first. The unauthorised works guide has the detail.
5. A commercial change of use or fit-out
The residential market's quiet. Businesses still need somewhere to operate, and the commercial side of our work hasn't slowed the way houses have. Three kinds of job moving right now:
- Change of use — a shop into a medical suite, a warehouse into a gym, an office into a childcare centre. The building barely changes; the approval does. Different SEPPs, parking rates, access, acoustics and fire.
- Fit-outs that trigger a DA. Most fit-outs are exempt. A medical centre or a food premises usually isn't, and the lease often makes it the tenant's problem.
- Industrial add-ons — mezzanines, hardstand, awnings, a second tenancy in a warehouse. Small DAs with an outsized effect on rent.
Same councils, same 63–83 day turnarounds, and a landlord or tenant who's motivated in a way a homeowner in a soft market isn't. If you own a commercial premises that's underused, or lease one that could work harder, find out what the use is allowed to be.
6. Checking the pathway most owners haven't heard of
The NSW Low and Mid-Rise Housing policy allows terraces, manor houses (three or four dwellings in a two-storey building) and small apartment buildings in R2 zones within walking distance of nominated centres and stations. The Pattern Book provides pre-designed low-rise and mid-rise buildings with a faster approval track, and the Low Rise Housing Diversity Code lets some of it through as complying development.
It's very location-specific. Inside the band, an ordinary 600 m² R2 block can carry a manor house; outside it, the same block is a dual occupancy at best. Most blocks aren't in it. The ones that are usually don't know. We check LMR eligibility as part of every desktop feasibility, and there's more on the low and mid-rise page.
The one that isn't a build at all: buy the approval
Every project above has a design-and-approval cost of roughly $10–30k sitting inside it, and that's the only line that doesn't inflate at 4–5% a year while you wait. A development consent or CDC lasts five years. For a bigger project you can't fund this cycle — a new home, a duplex — the approval itself is the project: $12–45k all-in with consultants, done while councils are quiet, held until finance suits. What it costs to be ready.
Where to start
Ten minutes on the NSW Planning Portal. Search your address and write down your zone, lot size and frontage, any overlays (flood, bushfire, heritage), and whether you're near a nominated centre or station. Easements are on your title, not the portal.
A $990 desktop feasibility. We read the controls for your lot rather than the suburb, check the overlays and the LMR bands, and tell you which of the six projects above your site genuinely supports — and which pathway each would take.
Pick by budget, not ambition. The budget ladder is the honest version of what each rung costs all-in; the cost estimator prices your own block.
Common questions
Which small project should I do first?
On most R2 blocks of 450 m² or more in Sydney’s south, a granny flat by complying development. It is $180–280k all-in, approved in weeks by a private certifier, a new dwelling under the post-May 2026 tax settings, and the size of job builders are keen to price properly while their order books are thin.
Can an extension really avoid a DA?
Yes, if it stays inside the Housing Code: setbacks, height, site coverage and landscaped area all have to comply, with no tolerance. Then it is a complying development certificate from a registered certifier. Step outside any standard and it becomes a development application, which for alterations and additions is one of the cheaper ones to run.
What does a Building Information Certificate actually do?
It stops council from ordering demolition or taking enforcement action against the work it covers for seven years. It does not make the work approved. That is enough for a buyer’s conveyancer or a lender’s valuer, which is why it matters before a sale or a refinance.
Is subdividing a dual occupancy expensive?
Compared with any build, no. It is largely a paper exercise: a survey, a subdivision application (Torrens or strata), a subdivision certificate and plan registration. It is slow rather than costly, which is why it is worth doing before a sale or refinance is waiting on it.
What is the low and mid-rise housing pathway?
NSW policy allowing terraces, manor houses and small apartment buildings in R2 zones within walking distance of nominated centres and stations, with Pattern Book designs on a faster track and some forms permitted as complying development. It is location-specific: inside the band a 600 m² block can carry a manor house; outside, the same block is a dual occupancy at best.
What if I can’t fund any build this cycle?
Then the approval is the project. Design and approval for a new home or duplex is $12–45k all-in with consultants, a development consent or CDC lasts five years, and it is the only cost that does not rise with construction inflation. Do it while councils are quiet and hold it until finance suits.
General information about NSW planning, current at September 2026. Not advice on a particular site — the instruments are amended often and councils vary them locally.
Which of these does your block support?
Send us the address. A $990 desktop feasibility reads the controls for your lot and tells you which projects the site genuinely allows, and by which pathway.