SMALL-LOT design specialists

Building design with PURPOSE and PASSION

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We believe in designing homes that are just right in size by working from functionality first, the key to well-designed floor plans that have a spacious feel but no wasted space. Australian families of all sizes deserve the opportunity to purchase their own home, and here at Principal Plans we are working hard, one home at a time, to make that vision a reality.

Recent Work

Our Mission

To assist clients in the production of beautiful, functional and affordable houses
in turn creating communities that are prosperous, sustainable (environmentally and socially) and conducive to living well.

Projects Completed


Happy Clients


Weeks Worked


Coffees Consumed


see us on Houzz

Henriette Werner in Meridan Plains, QLD, AU on Houzz
Henriette Werner in Meridan Plains, QLD, AU on Houzz
Henriette Werner in Meridan Plains, QLD, AU on Houzz
Henriette Werner in Meridan Plains, QLD, AU on Houzz
Henriette Werner in Meridan Plains, QLD, AU on Houzz


I highly recommend Henriette from Principal Plans as she tends to ‘think outside the box’ when designing homes that are on a small lot of land. She is creative in saving, as well as maximising, every ounce of space. She has a high work ethic and very approachable. Henriette has a wealth of experience and I urge you to ...
Cindy Steele Partner Top Gear Security
I have worked with Henriette for 18 months and known her for longer and have always found her to be professional, dedicated and honest in her dealings. I am impressed by her quiet confidence in her abilities balanced by being her own greatest critic. It is an honor to recommend Henriette to any future employers or clients.
Luke Shanahan Builder Shanahan Partners
Henriette has done an outstanding job in creating comprehensive and relevant house plans for me which are allowing me to grow my business to new heights. She is knowledgable and helpful and comes up with creative solutions to the challenges presented. Henriette genuinely has the client’s best interests at heart and is a pleasure to deal with.
James Thorrols Director Deluxe Homes
I’m loving that! Very clever. That’s exactly what that plan needs to be on that block!
Anita Bouwman Associate J Co Constructions
Henriette Werner has used her wealth of industry experience gained over many years to generate design solutions to small lot development which is becoming a feature of the urban environment. She is able to demonstrate that small lot development is a legitimate form of construction that not only achieves greater densities but can deliver exceptional building outcomes for many ...
Stuart Collins Sunshine Coast Branch Manager HIA


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