How Much Does A Koi Pond Cost?

Koi ponds can be both economical or expensive, but several factors go into determining the ultimate cost of owning or installing one. 

How much does a koi pond cost? A koi pond falls into an average price range of $1,171 to $4,889, with most buyers spending around $3,030. Many price variables go into the cost of installing a koi pond that affects its overall price, such as the following factors:

  • The size requirement of the pond (1000+ gallons)
  • Cost of Professional install vs. do-it-yourself (DIY) project
  • Cost of the fish
  • Cost of aquatic plants
  • Cost of maintenance
  • Cost of materials
  • Cost of accessories
  • Cost of equipment

Considering these cost factors ahead of time while you are still planning your koi pond install will save you a lot of hassle and potential budget problems later. 

After you establish how much you can stand to spend for the project going forward, you can then start to determine exactly what you need to buy and install in order to keep your project on budget. Read more about these factors below to determine what you can afford to pay. 

How Much Does A Koi Pond Cost?

Koi Pond Size and Its Effect on Cost

A koi pond is not your average aquarium, and koi are not your average fish. Growing to an enormous size, it is suggested that koi ponds should ideally be 1,000 gallons in order to comfortably house five koi fish. 

The more koi you want to have, the more water you should have to compensate. It is not advised to try and cram koi fish into smaller ponds, because they are expensive fish to kill through mismanagement and because it is cruel to the animals. 

A prefabricated pond kit for a thousand-gallon pond will run you roughly a thousand dollars,
give or take a few hundred dollars. This does not include any of the fish, materials, electrical work, etc.

Koi Pond Install Costs: Professional Install Versus Do-It-Yourself

There are two options for installing a koi pond in your yard: hiring some aquatic landscapers to install one, which can be extremely costly, or to install the koi pond yourself, which can be an economical (if backbreaking) choice. 

There are advantages and disadvantages with both methods that impact cost. Here is an overview of both approaches, with some pros and cons of each.

Cost of Getting A Koi Pond Professionally Installed

Getting someone else to put in a koi pond for you is the more expensive of the two choices. You’re not just paying for the materials; you have now taken on the cost of labor. Like many contractors, aquatic landscapers can cost hundreds of dollars in labor alone. 

There are other considerations when thinking of hiring contractors to do your work for you too. Here are a few of them:

  • You’re paying for expertise, and you’ll hopefully get it, which can be useful if you’re not familiar with doing large do-it-yourself landscaping projects and have no desire to learn. 
  • You also might get project delays and unfinished work, depending on the reputation of the people you hire. If you choose this route, it’s important to shop around and make sure you hire someone reputable. Get everything in writing before work begins. 

Cost of Do-It-Yourself (DIY) Koi Ponds

Putting in a koi pond yourself can be a worthwhile endeavor, especially when you’re considering the costs involved. By providing the labor yourself, you will end up saving thousands of dollars. DIY koi pond plans have a variety of options for cost-saving on both materials and construction.

That being said, building your own pond is not for everyone. It’s physically demanding work, as you have to be able to dig a hole that will hold at least a thousand gallons of water and probably more unless you want to do the bare minimum. 

DIY koi ponds also require a little bit of mechanical, electrical, and simple engineering know-how to make sure the mechanisms of the pond are installed properly and work as intended. Otherwise, a novice might end up making costly mistakes that have to be revised. 

Here are a few things to think about when deciding whether to install a koi pond yourself:

  • How much experience do I have with do-it-yourself projects? 
  • Can I install electrical mechanisms such as water pumps and tubing?
  • Do I have any experience in other fishkeeping activities, like aquariums?
  • How much time and energy do I have to put this project together? 

Other Costs Involved in Installing A Koi Pond

The cost of a koi pond doesn’t start and end with installation. Like indoor aquariums, koi ponds require constant maintenance to keep up the conditions of the pond for its aquatic inhabitants, and koi themselves can be very costly fish. 

Here are a few of the costs other than installation involved in starting up a koi pond:

  • Fish: Koi fish are expensive fish and can range from fifteen dollars into thousands of dollars per fish for imported Asian lines. This means that any mistakes you make learning how to keep these fish alive and healthy can be very costly.   
  • Aquatic Plants: Aquatic plants are necessary for the overall health of your pond, and usually cost around $10-30 per bundle depending on the species you choose. Pick your aquatic plants carefully, as some are more ideal for koi ponds than others. 
  • Equipment: Koi ponds require filtration, circulation pumps, a heater (in some climates) and a liner. These pieces of necessary equipment can run hundreds of dollars by themselves. 
  • Materials: The materials for a koi pond can get expensive, especially if you are using imported stone or driftwood. Driftwood can range from fifty dollars into the thousands of dollars, as
    can stone. 
  • Accessories: There are many things you can add to a koi pond other than fish and plants.
    Water features, lighting, and other decorations can tack hundreds of dollars onto your final project costs. 
  • Maintenance: The cost of a koi pond doesn’t end with installation. Maintenance chemicals like algaecide and water stabilizers, fish food, aquatic fertilizer, and electrical costs mean that a koi pond continues to cost money even after it’s been put in. 

Ways to Save Money on A Koi Pond

I think we’ve established that koi ponds can get pretty expensive, which is one of the reasons they’re not the hobby for everybody. However, there are a number of methods you can use to cut the costs significantly when deciding to put a koi pond in:

  • Choose goldfish over koi. Goldfish are colorful, ideal pond fish that get large like koi, but can cost significantly less money. A few high-quality goldfish can be purchased for just a few dollars compared to koi, which can run hundreds or thousands of dollars. 
  • Harvest your own aquatic plants. You should check into local regulations, but many areas will allow fish-keepers to harvest local plants. This can be an economical choice but be careful–introducing wild plant life can introduce pathogens and pests as well. 
  • Dig deep. Deeper water means your fish will have a place to get away from pondside predators like raccoons and herons, and also means that you will not have as much of an issue with combating algae. This will save you money in new fish and algaecide.

Final Thoughts

Building a koi pond can be a costly investment, so it pays to think the project through carefully before investing any money. Careful planning of your koi pond, in the beginning, can save you major bucks on your budget in the long run. 

By considering each factor of what you want your end result to look like, you can get a lot of your cost estimates squared away before you even start digging. 

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