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What You Need to Know about Drainage Planning in Your Auckland Home

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Being a homeowner in Auckland, you want your house to be protected from floods and storms.

Drainage planning is the process we use to develop a plan. To manage a property’s stormwater drainage needs. It involves the design, construction, and maintenance of drainage systems (also called stormwater systems) that collect and convey runoff from rainfall events away from the property.

The basic idea of drainage planning is to ensure that the property has adequate drainage. And that it is properly managed to control flowing water. Specifically, drainage planning involves the identification of areas on the property’s landscape that are prone to runoff. Determining the potential impacts of runoff on the surrounding area. Identifying methods for controlling, collecting and conveying runoff from those areas. And designing a stormwater system that adheres to local standards and regulations.

We can use this information to design and implement systems that minimise potential damage. And maximise efficiency.

Drainage Planning for New House Builds

Drainage planning is usually associated with new builds and subdivisions. There are quite a few things that drainage companies factor into a drainage plan. For example:

Conduct a Site Survey – Before taking any other steps in planning a drainage system. We survey the land to determine where the most natural runoff locations are. This will help decide which kind of drains to use.

Research local water tables and climate – different drainage solutions will work better in certain conditions.

Choose the right drainage system – from sewers to septic tanks. We make sure to select the most appropriate option for your situation.

Calculate the required slope of the pipes – good drainage depends largely on the pipes having sufficient grade and the right grade.

Utilize gravity – to save on pumps and energy costs. We plan the open channels, dry wells, and drain trenches in such a way that gravity does most of the work.

Consider the cost and maintenance associated – we take into account that some systems require more maintenance than others. And that maintenance could be costly over time.

Redirect runoff away from your house – We consider options such as grass-lined swales and berms, as well as underground collection systems.

Consider the environment – We can recommend plants and vegetation that are suited to local conditions and will help absorb and filter runoff water.

Assess the need for erosion control – especially in areas prone to high rainfall events, plan for sediment fencing and other control measures as part of your drainage plan.

Invest in quality materials – subpar materials can lead to costly drainage problems down the track, so it’s important to use the right materials right from the start.

New subdivision in Auckland that required a drainage plan

What if your house is old?

If your house is on the older side, it can be subject to corroded pipes or objects blocking your drains which can end up causing a flood in your yard. 

It is good to get your drains and pipes checked if you have just bought an older house or have noticed any problems with your drainage system. 

Is your house sitting at the bottom of a hill?

It is common for Auckland homes to be placed either on top or below a small hill. This is due to the high demand of housing. As well as the need to fit houses wherever they can be placed. If your house is placed under a steep small hill. You will need to reconsider your drainage plans.

When it rains, water will travel downhill and the last thing you need is water flooding your home. Consider getting stormwater detention tanks and channel drains installed around your home in order to keep your house safe from flooding.

To learn more about what type of residential drain laying, click here.

Is your house surrounded by trees?

If your home is surrounded by trees or bushes, it is good to check if your drains are prone to getting blocked. Homes surrounded by greenage can be subject to leaves and branches falling and blocking their drains. There is also the risk of tree roots damaging drainage pipes that are underneath the property.

Investing in outdoor drains that block out branches and leaves can help your pipes filter water through. Constantly checking that no big blockages on top of your drain can help prevent damage and flooding.

In Summary

It’s important to consider drainage planning when building a new house in Auckland. Careful planning and installation will ensure your drainage system is efficient and fit for purpose.

As the property owner, you don’t need to know too many of the details. As we do it all for you. But for us, it’s essential to know the types of systems available. To understand the local regulations and permit requirements. To select the appropriate materials, and to ensure your drainage system is installed correctly.

With the right planning and installation. You can enjoy a safe, dry, and comfortable home for many years to come.


Fox Drainage provides residential and commercial drain laying throughout Auckland. Let us know how we can help.

0274 921 043
09 367 5077