Property Development Foundations

How to Screen a Small Property Development Site Before You Spend Thousands

A property can look like a development site without being a development deal. The opportunity is in understanding the problem early: a disciplined first-pass check helps you decide whether the site deserves deeper investigation before you spend heavily on consultants.

Jason & Amy·30 Aug 2026·9 min read ♡

Screen the site before you spend thousands

One of the first skills a developing property developer needs is not finding the perfect site. It is learning how to reject weak opportunities quickly and identify the few that deserve proper due diligence.

This first-pass process is designed for small projects such as a duplex, a two-to-four-lot subdivision or a modest townhouse proposal. It is not an approval, a valuation or a substitute for professional advice. Think of it as the step between seeing a listing and assembling your consultant team.

Start with a strategy—not the real-estate advertisement

Before opening a planning map, write down the outcome you are testing. “It has a big backyard” is not a strategy. “Retain the existing home and create one lot behind it” is a strategy you can investigate.

Your first sentence should identify:

• the proposed development type;
• the likely number and size of dwellings or lots;
• whether the existing dwelling stays or goes;
• the intended buyer or end user; and
• your likely exit—sell, hold or a combination.

If you cannot describe the idea simply, you are not ready to test the site. A clear strategy tells you which controls, costs and professionals matter.

Check 1: What do the planning controls actually allow?

Search the relevant state or territory planning portal and the local council’s current planning scheme. Record the zone, overlays and the controls relevant to your strategy. Depending on the location and proposal, these may include minimum lot dimensions, density, setbacks, private open space, height, parking, landscaping, heritage, flooding, bushfire or biodiversity.

Do not stop when the land use appears permissible. “Permitted with consent” does not mean the design will work, approval is certain or the project is financially viable. In NSW, for example, the official Planning Portal explains that zoning tables help determine whether development requires consent, while its Spatial Viewer shows planning constraints and zoning for an address. The portal also warns users to check the applicable instruments and current council information.

First-pass outcome: write “possible”, “unlikely” or “unclear”, then record what a town planner must confirm.

Check 2: Can the idea physically fit?

Planning potential can disappear when you test the actual block. Look at frontage, depth, shape, slope, existing buildings, vehicle access, significant trees, neighbouring windows and the likely location of services.

For the retain-and-build-behind scenario, measure the apparent side clearance beside the existing house. Then ask whether it could accommodate the required driveway, pedestrian access, drainage and construction access. Do not assume an online measurement or sales plan is survey-accurate. Use it to decide whether ordering a survey and concept plan is justified.

Good developers investigate before they speculate. At this stage, a rough sketch should expose questions—not pretend to be a finished design.

Check 3: What does the title say you are buying?

Obtain a current title search and the relevant plan through the land registry or an authorised provider in the property’s state or territory. Ask a property lawyer or conveyancer to explain easements, covenants, restrictions, rights of way and other interests that could affect the proposal.

An easement across the rear may compete with the new building area. A restriction may limit materials, dwelling numbers or use. The title will not answer every design question, but ignoring it can make the rest of your desktop work meaningless.

First-pass outcome: identify which title items require legal, surveying, planning or engineering advice before you rely on the proposed yield.

Check 4: Where are the services—and can the project use them?

Look for sewer, stormwater, water, electricity and telecommunications. Before You Dig Australia provides a national referral service for plans from participating infrastructure owners, but BYDA makes clear that those plans generally show approximate locations, may not include every asset and are not approval to excavate.

For development feasibility, the bigger question is often not simply “Is there a pipe nearby?” It is “Can the proposed development connect at the required level and capacity, and what will that cost?” A rear lot that needs a new easement, pumping solution or major upgrade may still work—but the feasibility and negotiation need to reflect it.

This may not kill the deal—it may simply change how you structure it.

Check 5: Do the market and numbers support the idea?

A planning concept is not yet a property deal. Find comparable evidence for the product you expect to create—not just sales of large established houses nearby. Check likely sale prices or rents, buyer demand, construction and civil costs, consultant fees, authority charges, finance, holding costs, tax, selling costs and contingency.

Run a conservative first feasibility before making an emotional commitment. Then test what happens if the project takes longer, costs more or sells for less. Your early figures will contain assumptions; label them and replace them with professional evidence as the investigation progresses.

If the margin only works when every assumption is optimistic, the site has not passed the first screen.

Turn the first pass into a traffic-light decision

• Green: no obvious fatal issue, the broad numbers have room, and the next consultant spend is justified.
• Amber: the site may work, but one or more uncertainties could materially change yield, cost or timing.
• Red: the strategy appears prohibited, physically unworkable or commercially weak under reasonable assumptions.

Amber is not permission to guess. It is a list of questions. Speak to the professional best placed to answer the biggest one first. That may be a town planner, surveyor, civil engineer, designer, quantity surveyor, finance adviser, accountant or property lawyer.

Your Turn

If you found the 820-square-metre block in the example tomorrow, which unanswered question would you investigate first—and which professional could replace your assumption with evidence?

Successful small-scale developers do not need to know every answer at the beginning. They need to know what to check, what not to assume and when to bring in qualified people. Your confidence grows when your due diligence improves.

General educational information only. Planning systems, approval pathways and property laws vary across Australia and change over time. Obtain independent legal, financial, tax, planning, surveying, engineering and building advice for the specific property and proposal.

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