GY & Co property potential report
GY & Co · North Shore + Eastern Suburbs · 600-900sqm specialist
Enter your Sydney address for a free 60-second property potential report. We check real NSW planning data — zoning, lot size, FSR, frontage, height and likely constraints — so you can see whether your block is better suited to a second storey, rear extension, granny flat, dual occupancy or a more cautious path.
Enter your property address
Start with your address. You will see an initial pathway in 60 seconds, then we personally review strong-fit sites for the next step.
Privacy promise: No aggressive sales calls. We do not resell your data or send your address to third parties. If your block has limited extension potential, we will tell you straight.
I started GY & Co. because I saw too many families in Wahroonga, Killara and Vaucluse spend $400k in the wrong direction. In Sydney, the wrong first decision costs more than the wrong finish. The land question has to come first.Yvonne · Founder · Strategy Review · Since 2016
Before you enter an address
Yes, free. We use it to pull NSW planning controls for your lot. We don't list it, share it, or sell it. Every review is done in-house.
No. The first step is advice before construction. GY & Co. is a licensed builder, but there is no obligation to build with us after your initial review or feasibility work.
Then we'll tell you. Some blocks are better off with a focused extension, not a second storey or duplex. That's a valuable answer too — it saves wasted design spend.
Reviewing your site
Initial site reading
Multiple matches — select the correct property
Satellite view
Unlock the full reading
You're seeing the headline pathway for . Enter your email to unlock the remaining four insights — instantly, on this page.
One free site review per email. No aggressive sales calls — just your result and, if useful, a follow-up about whether deeper feasibility is worth it.
Not every site should move forward. Our role is to help you understand what is worth pursuing, what needs caution, and where the real value may sit.
What this initial read can't tell you
We're builders. That's why we charge for our judgment first — a builder who can't tell you "don't build" is giving you a sales pitch, not advice.
About the practice
GY & Co. is a boutique practice focused on land strategy for 600–900sqm homeowners in the North Shore and Eastern Suburbs. We exist to answer one question honestly — before you commit to design or construction, what does your block actually support?
We are strategy-led before we are construction-led. GY & Co. can carry the right project into design coordination, approvals and licensed construction, but the first answer is not a quote and there is no obligation to build with us.
Check My Block is founder-led. When you apply for a Feasibility Review, you're speaking to the advisor doing the work — not a call centre, not an intake form pretending to be personal. We take a limited number of properties each month.
Next step
This page gives you a directional read on the site. To act on it, you need site-specific numbers — exact CDC eligibility, real cost ranges, and an honest call on viability. Pick the path that fits where you are.
Tier 1 · Free
Highest-Best-Use Report 2026
North Shore + Eastern Suburbs · Duplex vs extension vs rebuild ROI · Sent by email.
Free
Tier 2 · By application
Feasibility Review
Custom 8–12 page report · Pathway recommendation · Cost & uplift modelled · 2 weeks. For properties that warrant deeper review.
From $1,250
This is an initial site assessment based on available planning and location data. It is not a property valuation, planning approval, construction quote, or substitute for formal planning, architectural, engineering or legal advice. Planning pathways are subject to zoning, site constraints, local controls and applicable provisions.