Welcome to AllenCO Construction

Underpinning, Renovations and New Builds

Adelaide, South Australia


0429 999 478

We specialise in Underpinning in Adelaide and South Australia. Building on a solid foundation is the backbone of our business.

Our underpinning specialists work with you to ensure that any inconvenience, minimise noise and disruption, whilst we repair your home as quickly as possible. Once we have completed your structural underpinning there are often other jobs that may result from jacking up and strengthening your concrete footings such as repairing and repainting cracks, or patching work carried out to make your home look as good as new. All our underpinning specialists are multi-skilled workpeople who can assist you with any wall or door repairs or painting necessary to complete the job. We want you to feel 100% satisfied with the finished product.


Do you have an idea that you want to bring to life, to make your house a home? Want to add a new room or level? We specialise in working with you to achieve your custom renovation dreams come true. Bespoke and custom builds are our passion.

We consider your ‘house’ your ‘home’, and any improvements you chose to make are an investment. We pride ourselves on our high-quality work ethic, ensuring that our work will stand the test of time. We don’t believe in cutting corners or quick fixes. We are not a ‘volume builder’ – we are a custom builder and choose to take the adequate amount of time to ensure your house is built to last.

Check out some of our custom renovation and addition work.

Decks and Pergolas

Pergolas create an outdoor sanctuary for you and your family to relax and entertain whenever you please. AllenCO construction can seamlessly link your garden with your property with a deck & pergola.

AllenCO construction build decks and pergolas recognisable by their strength, performance and style.

If you are unsure which pergola design will work best for your home and outdoor area our master builder Jade is always happy to advise you, working closely with our clients to create an outdoor living area they are proud to own.

Check out some of our decks and pergolas.

Call 0429 999 478 Today for a free no obligation quote.

Get a specialist Quote Today

Our Services


Additions Services

Dog on construction site

Renovations Services

Outdoor decking and entertaining

Decks and Pergolas Service

Re-roofing Existing Buildings

Shed Building Services

Commercial and Residential Shed Building   .

Our Affiliates

Master Builders South Australia Logo
Stratco Logo