The AGATHĒ Builders team with clients at a completed home
North Shore · Northern Beaches · Newcastle

Built to
last generations

We build healthy, high-performance homes for families who care how their home works, not just how it looks on handover day.

Our team, with clients on site
Certified Passive House Tradesperson
Master Builders Association
NSW Licensed Builder
Sustainable Builders Alliance
Lic. No. 463967C

A home built to last.
A process you can trust.

AGATHĒ was built around a simple idea: that a well-run project, built with genuine skill, should feel like working with someone who has your interests at heart.

We keep you informed at every stage, explain the thinking behind each recommendation, and build homes that are made to last and perform. From the first conversation through to handover, our focus is on doing it properly and keeping the process calm and clear.

About AGATHĒ

No surprises.
Just a clear path.

Our Pre-Approval Consulting process exists because we have seen what happens when clients skip it. Scope surprises, budget overruns, decisions made under pressure. We do the hard work upfront so construction can run cleanly.

Explore Pre-Construction
01

Initial Conversation

We talk through your project, your budget, and what success looks like. No obligation, no sales pitch. An honest conversation about whether we are the right fit.

02

Pre-Approval Consulting (PAC)

A dedicated pre-construction phase where we work with you and your designer to develop a clear scope, accurate budget, and a complete understanding of your project before you commit to building.

03

Fixed-Price Contract

Once the scope is settled, we price it honestly. No contingency padding, no provisional sums on items we should be able to price. You know what you are paying before you sign.

04

Construction and Communication

Regular updates, open access to your site, and a project manager who answers the phone. We treat communication as part of the product, not an afterthought.

Building science,
not just building

01

Healthy Home Performance

Temperature consistency, indoor air quality, acoustic comfort. We understand how a building performs as a system and build accordingly. These questions are central to how we work, considered from the first design decision through to handover.

02

Passivhaus Principles

Mitch holds Australia's Certified Passive House Tradesperson credential. That is not a marketing line. It means we apply rigorous building science to your project, whether that is a full Passivhaus or simply a better-performing renovation.

03

Pre-Construction Clarity

Our Pre-Approval Consulting process surfaces every cost, risk, and decision before you are committed. You get a real picture of your project, not an optimistic quote designed to win the job.

Manly, Northern Beaches

Highlights

View All Projects
Balgowlah Heights first floor extension

First Floor Extension

Balgowlah Heights · Northern Beaches
Castle Hill alteration and addition

Alteration + Addition

Castle Hill · Hills District
Narrabeen whole-home renovation

Whole-Home Renovation

Narrabeen · Northern Beaches
Our Story

Watch our story

What Makes a
Home Perform

All Articles
Condensation and rain on a dark-framed window looking onto a green garden

Why Your Renovation Might Be Making You Sick

Mould, condensation, and poor air quality are building failures masquerading as maintenance problems. Here is how we diagnose them and what good construction looks like.

Read Article
AGATHĒ team reviewing plans together during pre-construction planning

The Real Cost of Skipping Pre-Construction

Clients who skip the planning phase do not just get surprised. They lose negotiating power, time, and budget at every stage of the build.

Read Article
Calm living room with a linen sofa, sheer curtains and soft natural light

Thermal Bridging: The Hidden Reason Your House Is Cold in Winter

Most Australian homes are built without addressing thermal bridging. It is invisible, it is everywhere, and it matters far more than the insulation rating your builder mentions.

Read Article
"I highly recommend the team at AGATHĒ. They were patient, flexible and very thorough in their planning."

Julie

Pre-Construction Client

Start the right way.

Most projects go wrong in the planning phase, not the building phase. Our pre-construction process is designed to give you clarity before you commit a dollar to construction.

Download the Free Guide

Let's Talk About
Your Project

Whether you are at the early thinking stage or ready to move, we are happy to have an honest conversation. No obligation. We will tell you if we are not the right fit.

Phone 0431 518 172
Response We aim to reply within 24-48 hours
Area North Shore · Northern Beaches · Hills District · Central Coast · Newcastle