Sydney’s Leaders in Underpinning & House Foundation Repairs


Welcome to A1 Underpinning! We’re underpinning and house foundation specialists you can rely on in Sydney & surrounding areas.

With over 28 years industry experience, we can respond to your foundation repair needs 24 hours a day, 7 days a week.

Common House Foundation Issues

Cracked walls, jamming doors, cracks in Gyprock, gaps beside windows and broken drains are all common house foundation issues that need to be checked and fixed if required.

Most of the issues often require a brick pier replacement, foundation repair or house underpinning solution. While the problems can start out small, left unchecked, damaged or subsiding foundations can lead to future structural issues that can range from the expensive to the irreversible.

If you happen to experience one of the problems mentioned above, feel free to reach out to us.


Why Do You Need Underpinning?

Underpinning Sydney

How We Can Help You

Underpinning Sydney

For the past 28 years, our team is delighted to have been providing cost-effective, reliable, safe and professional underpinning and house foundation services to homes and businesses in Sydney. We use the latest techniques to deliver house underpinning and foundation repair solutions for even the most complex of projects.

So for all your house foundation, underpinning and structural restoration needs in Sydney, do not hesitate to contact us.

Our Efficient Underpinning Process

We have a quick and efficient process to ensure the best and smoothest underpinning project for your convenience and peace of mind.
Get In Touch
1. Get In Touch
Get in touch with us for an assessment and quote.
Meet On Site
2. Meet On Site
We will check and assess your property.
Submit Quotation
3. Submit Quotation
We will send you a comprehensive quote.
Quotation Acceptance
4. Quotation Acceptance
You accept the quote.
Schedule Work
5. Schedule Work
We will schedule the work.
Job Completion
6. Job Completion
Get the job done & clean up your property.

Our Services

House Underpinning

House Underpinning

Is your Sydney home showing signs of foundation issues? Are you seeing cracks in the walls or doors that won’t close properly? These can be signs of underlying severe troubles with your structure. Or you might be planning to do significant renovations requiring excavating part of your foundation. In either case, underpinning can help stabilise your home’s foundation, prevent further damage and secure your building.

Foundation Repairs

Foundation Repairs

Wondering if your property needs foundation repairs? Signs include, cracks in the walls or floors, doors and windows that stick or won’t open and close properly, gaps between the ceiling and walls, and sagging or uneven floors. If you notice any of these signs, it’s important to have a professional assess the situation. At A1 Underpinning, we can check your house foundations and advise you on the best course of action.

Brick Pier Replacement

Brick Pier Replacement

There are many reasons why you might need to replace your brick piers. If the piers are cracking or crumbling, they may no longer be able to support the weight of your home. If the piers are settling, they can cause the foundation of your home to become unstable. If you suspect that you may need to replace your brick piers, contact us and we will assess the condition of your piers and recommend the best course of action.

Concrete Crack Repairs

Concrete Crack Repairs

Concrete cracks are inevitable and can happen for a variety of reasons. Whether it’s due to settling, tree roots, freezing temperatures, or simply wear and tear, cracks in your concrete can create serious problems if left unaddressed. Not only can they be unsightly, but they can also lead to water infiltration, which can cause further damage to your foundation, walls or slab. Call for a quote.

Jammed Door Repair

Jammed Door Repairs

If your door becomes stuck or jammed, it can be a sign of underlying issues with your structure. Not being able to open or close your doors or windows can make it difficult to get in or out of your home and can pose a serious security risk. In most cases, jammed doors can be a sign of more serious issues with your foundation, especially if your building is old or your building is built on unstable ground.

Wall Crack Repair

Wall Crack Repairs

There are a few different scenarios in which you might need to contact a professional for wall crack repairs. If you notice cracks in your walls that seem to be getting larger or more numerous it may be time to call a professional. Wall cracks are very often an indicator that you have foundation problems. If you notice cracks in your walls or ceilings, contact us for a foundation inspection.

Why Choose Us

Our Recent Projects

Client Testimonials

Mark came out on time to provide a quote for a floor levelling and brick pier replacement work. He took his time to explain how the situation may have occurred and options to remedy. Certainly seems to know his stuff. Was able to talk about the modifications that were done to the house from what he was seeing in the foundations. We haven’t proceeded with the works yet, but I know where I’d be heading.

5 stars
Manish Gupta

Mark and his team have done two projects at my house. They fixed the sinking floor and helped to fix a disaster project by another tradie. These guys are fantastic! Their quote is reasonable, always comes on time, does a great job and keeps the place clean after themselves. Very professional and experienced, give honest advice and suggest the best approach. I am very happy with the results and will gladly work with them again.

5 stars
Evgeny Novikov

Thanks to Mark & his team for an extremely professional job!!
We were really impressed (as were our neighbours) at the level of care taken especially with regard to access, the tricky nature of the site and for the clean up afterwards. They definitely live up to their name and we would have no hesitation in recommending A1 Underpinning.

5 stars
Lisa McGuinness

Request A Quote

Dealing with structural or foundation issues? Is your wall & gyprock cracking, are doors jamming, and are there gaps beside windows? We can help. Fill in the form, and we will get back to you as soon as possible.

This field is for validation purposes and should be left unchanged.

Underpinning & Foundation Repairs FAQs

We’ve taken the liberty to answer some of the most common yet critical questions pertaining to Sydney underpinning, foundation repairs and structrucal restorations.

1. What is underpinning?

Underpinning is the process of strengthening and stabilising the foundation of an existing home building or commercial structure. This is done by excavating around the perimeter of the foundation, and then installing support beams or posts to reinforce the original foundation.

2. Why would I need underpinning?

There are several reasons why you might need underpinning. Perhaps the foundation of your home is settling, or cracking due to age or wear and tear. Or, you might be planning an extension to your home, which would require additional support for the new structure.

3. How much does underpinning cost?

The cost of underpinning depends on a number of factors, including the size and condition of your existing foundation, the type of underpinning you need, and the difficulty of access to your property. Generally speaking, underpinning can cost from $5,000 up.

4. How long does underpinning take?

Again, this depends on a number of factors, including the size and condition of your existing foundation, the type of underpinning you need, and the difficulty of access to your property. Generally speaking, underpinning can take anywhere from a few days to a few weeks to complete.

5. Will I need planning permission for underpinning?

You might need planning permission for underpinning, depending on the type of work you are planning to carry out. It is always best to check with your local council before starting any work on your property. At A1 Underpinning, we can help you on this aspect. Contact us today if you need our help.

6. Do I need a building permit for underpinning?

You will need a building permit for underpinning if the work you are planning to carry out is classed as ‘building work’. This includes excavation work, and the installation of support beams or posts. Building permits are generally issued by your local council.

At A1 Underpinning, we will work closely with you from start to finish. Contact us today if you need help.

7. Are there any risks associated with underpinning?

Underpinning is a complex process, and there are always risks associated with any building work. However, these risks can be minimised by choosing a reputable and experienced contractor like A1 Underpinning. We’re licensed and insured to carry out all facets of underpinning, foundation repairs, structural restorations, drainage repairs and all sorts of house relevelling. Contact us today if you need our help.

There are many benefits to underpinning, which include:

1. Improving the stability of a building: This is the most obvious benefit of underpinning, and is the reason why many people choose to undertake this process. Underpinning can help to stabilise a building that has been damaged by subsidence, or that is at risk of collapsing. Staying in a secure home gives you peace of mind, and this is always what we aim for our Sydney clients.

2. Extending the life of a building: By improving the stability of a building, underpinning can help extend its life. This is particularly beneficial for historic buildings, which may be at risk of collapsing if foundations are not repaired or supported.

3. Preventing further damage: Underpinning can help prevent further damage to a building, by stabilising it and preventing it from moving. This can help prevent cracks from appearing in walls or floors, and can also stop doors and windows from misaligning.

4. Improving the appearance of a building: Underpinning can help improve any home or structure’s appearance. This is because underpins level out a building that has been damaged by subsidence. Underpins also straighten walls that have become crooked.

5. Increasing the value of a building: It increases the value of a building, because underpinning makes a structure more stable, durable and safe for use.

If you want to enjoy the benefits of underpinned home, contact A1 Underpinning today.

The cost of underpinning in Sydney can vary greatly depending on a number of factors, such as the size and depth of your foundation, the type of underpinning you need, and the contractor you choose. However, on average, you can expect to pay from $5,000 up.

If you need underpinning for your home or business, it’s important to get multiple quotes from different contractors before making a decision. This will help you ensure that you’re getting the best possible price for the work that needs to be done.

Don’t hesitate to contact us if you need more information about the cost of underpinning in Sydney. We’ll be happy to provide you with a free quote.

1. What are some common signs that my house foundation needs repairs?

Some common signs that your house foundation may need repairs include cracks in the walls or floors, doors and windows that stick or don’t close properly, gaps between the floor and wall, or a sinking or settling feeling when you walk around inside your home. If you notice any of these signs, it’s important to have a professional inspection to determine the cause and whether or not repairs are necessary.

2. What can cause my house foundation to need repairs?

There are a number of factors that can contribute to your house foundation needing repairs, including poor drainage around the perimeter of your home, soil erosion, tree roots growing into the foundation, or damage from an earthquake or other natural disaster. In some cases, simply age, wear and tear can also lead to foundation problems.

3. How much will it cost to repair my house foundation in Sydney?

The cost of repairing your house foundation will depend on the extent of the damage and the type of repairs that are required. In some cases, minor cracks can be repaired with sealant for a few hundred dollars, while more major damage may require the foundation to be reinforced or even replaced, which can cost thousands of dollars. For accurate pricing and professional foundation repair services in Sydney, contact A1 Underpinning.

4. How long will it take to repair my house foundation?

The amount of time it will take to repair your house foundation will again depend on the extent of the damage and the type of repairs that are required. In some cases, such as with minor cracks, repairs can be completed in just a few hours. However, more major damage may require days or even weeks to fix. If you need us to check your house foundation, feel free to contact us and we will get back to you accordingly.

5. Do I need to move out of my house while repairs are being done?

In most cases, you will not need to move out of your house while repairs are being carried out. However, if the damage is extensive or if there is a risk of further damage occurring, you may be advised to stay elsewhere during the repair process.

6. Will my insurance cover the cost of repairs?

In some cases, your home insurance policy may cover the cost of repairs to your house foundation. However, it’s always best to check with your insurer before assuming that they will pay for any or all of the work that needs to be done.

1. What are the most important considerations when undertaking a restoration project in Sydney?

There are many important considerations to take into account when undertaking a home restoration project in Sydney.

First and foremost, it’s crucial to carefully research and select a reputable and experienced contractor who will be able to carry out the work to a high standard.

It’s also important to clearly communicate your vision for the project to the contractor, and to make sure that they understand your budget limitations. Once the work is underway, it’s important to be flexible and open-minded, as unforeseen problems and challenges can often arise – but with a good contractor, these should be able to be overcome relatively easily.

Finally, once the project is completed, it’s essential to take the time to properly maintain and care for your newly restored home, in order to keep it looking its best for years to come.

2. What are the benefits of restoring a heritage building in Sydney?

There are many benefits to restoring a heritage building in Sydney. One, it can help preserve the city’s unique character and history. Heritage buildings are a key part of what makes Sydney such a special place, and by restoring them we can ensure that they remain an important part of the city for future generations

3. How can I ensure that my restoration project is successful?

There is no one-size-fits-all answer to this question, as the success of your restoration project will depend on a number of factors, including the type of project you undertake, the condition of the property you are restoring, and the skill set and expertise of a structural restoration team to handle your project.

Below are a few key tips that can help to ensure that your restoration project is a success:

– Understand the job & process involved
Before you start any restoration project, it is important to do your research and make sure that you understand the process involved. This means reading up on the subject, talking to experts, and visiting other properties that have been successfully restored. By doing your research, you will be better prepared for the challenges that you may face during your own project.

– Hire a professional
If you are undertaking a large or complex restoration project, it is generally advisable to hire a professional contractor or architect to help you. A professional will be able to advise you on the best way to approach your project and can help to ensure that the work is carried out to a high standard. If you’re looking for trustworthy, reliable structural restoration specialists near you in Sydney, let us know.

– Create a budget
Restoration projects can often be expensive, so it is important to create a realistic budget before you start work. By planning ahead and knowing how much you are willing to spend, you can avoid any financial surprises later on.

Try getting online quotes from structural restoration contractors like us – at A1 Underpinning, we can give you the most accurate estimate while providing you with topnotch service from start to finish. Contact us to get started.

– Allow for unforeseen problems
When undertaking a restoration project, it is important to allow for unforeseen problems and set-backs. No matter how well you plan, there is always a chance that something will go wrong. By expecting the unexpected, you can avoid becoming overwhelmed if things do not go according to plan. However, if you want to ensure everything runs smoothly, it’s always best to leave the project to us – we’re structural restoration experts who have gained the trust of Sydney homes and businesses for over 28 years. Contact us today if you require our expertise.

– Take your time
Restoration projects can take a long time to complete, so it is important to be patient and take your time. Rushing a project is likely to lead to mistakes being made, so it is better to take your time and make sure that the work is carried out correctly.

4.What are some common pitfalls to avoid during a restoration project in Sydney?

Not doing your research: It’s important to do your research before starting any restoration project in Sydney. There are a lot of different factors to consider, such as the age of your home, the type of damage, and the best way to fix it. If you don’t take the time to do your research, you could end up making a lot of mistakes that will cost you time and money.

Not getting quotes from multiple contractors: Don’t just take the first quote you get from a contractor. Get quotes from multiple contractors so you can compare prices and services. This will help you find the best value for your restoration project.

Not having a budget: Before starting any restoration project, you need to have a budget in mind. This will help you avoid overspending and make sure you stay on track.

Not getting the right permits: Depending on the type of restoration project you’re doing, you may need to get different permits. Make sure you research the permits you need and get them before starting any work.

Not being prepared for the project: Once you start your restoration project, things will inevitably come up that you didn’t plan for. It’s important to be prepared for these surprises so they don’t throw off your entire project.

Not choosing professional experts: Failing to choose a professional structural restoration team to work on your project will lead to more costly mistakes down the line. So, always remember to deal with experts you can trust, a local structural restoration company like us – A1 Underpinning, will always go above and beyond to get your project done upholding the highest safety standards.

By avoiding these common pitfalls, you can ensure that your restoration project in Sydney goes smoothly and is a success. Contact us today if you need help.

Do you cover commercial sectors?

Yes, we proudly serve all residential and commercial clients throughout the greater Sydney metropolitan area.

Do you offer 24/7 services?

Yes, we do. For 24 hour emergency house underpinning, foundation repair and construction services, contact A1 Underpinning as we are available 24 hours a day, 7 days a week.

How long have you been in the industry?

We’ve been in the industry for over 28 years.

Do you offer free quotes?

Yes, we offer no obligation free quote.

Apart from underpinning, what other services do you offer?

We also offer professional and affordably priced services including Foundation Repairs, Brick Pier Replacement, Wall Crack Repairs, Jammed Door Repairs, Concrete Crack Repairs, House Relevelling, House Restumping, Bouncing Floor Repairs & Drainage Repairs. Contact us to request a quote.