Feasibility Sketch Service

Turn Uncertainty Into a Clear, Buildable Vision

You’ve found a site that looks promising — but before you commit design fees or go into DA/CDC, you need to know exactly what can fit, what it could return, and whether it’s worth pursuing.

That’s where a Feasibility Sketch from Duplex Building Design changes everything.

Why a Feasibility Sketch Matters

Here’s the thing — every profitable project starts with a clear understanding of what’s possible under the rules, not what looks good on paper.

Too many investors spend thousands on full design drawings that hit a wall once council or CDC constraints show up. A Feasibility Sketch gives you a faster, smarter path:

Know what you can build before committing to full design costs
Visualise your development potential with scaled concept layouts
Spot compliance traps early before they become costly redesigns
Test multiple yield options (duplex vs townhouses vs terraces) side by side
Accelerate decision-making with clear, data-backed visuals your builder, lender, or partner can rely on

It’s the shortcut to confidence — before you spend big.

What You’ll Receive

Your Feasibility Sketch package includes:

Site Analysis

We assess zoning, FSR, setbacks, lot slope, and access to determine what’s actually achievable.

Concept Layout Sketch

Scaled site plan concepts showing dwelling placement, parking, and private open space.

Yield Summary

Estimated GFA, floor areas, number of dwellings

Approval Pathway Overview

Whether it’s best suited to DA or CDC, including expected timing and complexity.

Next Step Plan

Practical advice on how to move from sketch to approved plans efficiently.

Delivered as a clear PDF presentation — perfect for sharing with investors, builders, and financiers.

Who This Service Is For

This service is
designed for:

It’s not for:

Who This Call Is For

We know the codes. SEPP and local council rules are our daily language.
We think like investors. Every sketch is built around ROI, not just compliance.
We move fast. Most feasibility sketches are turned around within 5–7 business days.
We simplify the next step. If the site stacks up, we handle the full design and approvals process seamlessly.

That’s how our clients save time, avoid headaches, and get projects construction-ready faster.

What Happens Next

Enquire below and share your site address or property details

We’ll review the site and confirm suitability and turnaround.

You’ll receive your Feasibility Sketch package — clear, professional, and ready to guide your next move.

Average turnaround: 5–7 business days 
Typical investment: Starting from $1,250 + GST (depending on site complexity)

Book Your Feasibility Sketch

Get the clarity you need before committing big money to design or approvals.  A Feasibility Sketch shows exactly what’s possible — fast, visual, and specific to your site.

Book your Feasibility Sketch today.

TESTIMONIALS

WHAT OUR CLIENTS SAY

We found Nathan and the team at Duplex Building Design great in bringing all our ideas into the design of our home in a timely and professional manner. We found them to be ﬂexible in their approach and informative in relation to council building requirements as well as recommending products that suited our house plans and design. On the success of our house design we also used Duplex to design our small townhouse development and they were fantastic in all facets of the planning process

We used Nathan and his team at Duplex Building Design for our dual occupancy design at Oak Flats, we were very pleased with how professional Nathan was, he listened to our ideas and was able to gain approval in council with minimal fuss. The whole process was professional and smooth and will be coming back for our next investment project.

We were blown away by Nathan and the way he helped us with our renovation design and granny ﬂat on our property at Cronulla. We had a bad experience with the previous designer so came into this process nervous, Nathan was professional and easy to communicate with, he helped us through each stage of the process from the initial design through to the council approvals. Our project is approved and we are looking forward to starting. We can’t recommend Nathan and his staﬀ more highly enough.

This was the ﬁrst time we had plans drawn up and was not sure what to expect. Nathan was prompt and listened to what we wanted with our unit development and provided exactly what we asked for as well as two other options to show what could be achieved. We needed one small revision which was completed within 4 hours and we are extremely happy with the service. We will deﬁantly use Duplex Building Design again in the future.

Here’s the outcome:  You’ll go from “we think it might work” to “we know exactly what works.” A Feasibility Sketch from Duplex Building Design isn’t a guess — it’s your site, visualised with precision, compliance, and profit in mind. If you’re serious about developing smarter and faster, start here. Get your Feasibility Sketch today.

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