How long does it take to build a pond?

An average backyard ecosystem pond takes a crew of four or five about three to four days on site: the dig is one day, the underlayment and liner go down in about three hours, the rock takes a day, and the stream, plants, lights and cleanup fill the rest. A pondless waterfall is about three days for a standard build, a fountain is one to two days, and a koi pond runs from four days to about three weeks depending on size, bottom drains and concrete. Those figures come from six contractor pages that answer the question directly, and they agree closely enough to build one schedule from them.

What the manufacturer and the trade press publish

No liner maker, pump maker or extension service publishes a build schedule, so there is no official figure for days on site. What Aquascape publishes is the sequence. Its support article "How do I install an Aquascape Pond Kit" refuses automated fetches, but Aquascape Construction lists the same 20 steps on a fetchable page: mark pond area, place skimmer and BioFalls filter, lay plumbing, hook up BioFalls filter, excavate pond, install liner and underlayment, hook up skimmer, put rock in pond, position underwater lights, wash stones, fill pond, build waterfall and stream, bring in top soil, build retaining wall, tweak waterfall, trim liner, mulch berm, clean up, explore the welcome kit, enjoy. The order matters for the schedule: the skimmer, filter and pipe are set before the digging starts, so the spoil from the hole buries the pipe. Aquascape Australia compresses the same job into six stages, with "Lay the pipe from the BioFalls to the skimmer, covering it with the dirt you excavate for your pond."

Aquascape's own training page could not be fetched either. A search snippet for its Build a Pond Day class describes installing an 11 by 16 foot pond kit "using 20 products and 20 steps to get the job done in just one day", with a class of contractors doing the work. That is a training build with a large crew and a prepared site, and it is quoted here only as a snippet.

Pond Trade Magazine prints build reports that say how long each job took. Brent Hullinger of The Pond Beyond, Frankfort, Illinois, built an 8 by 11 foot koi pond with visiting Certified Aquascape Contractors and reports "our pond excavation was completed in approximately 1 hour" and "Time to complete: 2 days". MJ Wilson describes a Northamptonshire pond "4 meters long (14 feet) by 3 meters wide (10 feet) by 1.2 meters deep (4 feet)" with a 12 foot stream, where "The construction time was a total of six days for three people." For concrete work, Demi Fortuna writes that concrete needs to be kept moist for "at least 3 days" to develop strength.

What the contractor pages say, side by side

The table lists each build type with the crew and duration each source actually states. Where a source gives no crew size, the cell says so.

Premier Ponds is the only one of the six that states a crew size, and Grass Roots Pond and Garden in New Boston, Michigan repeats Premier's task times to the hour. Both give the same breakdown: excavation one day, filters and skimmers "a few hours" set alongside the dig, underlayment and liner about three hours, rocks and gravel about a day, finishing touches a day, and additions such as lights or a longer stream a day or more. Grass Roots also grades its own packages, from one to two days for a basic small pond up to eight days for its high end large pond.

Day by day for an average ecosystem pond

Laying the Premier task times over the Aquascape sequence gives a schedule a homeowner can check against the crew in the yard. Premier's installation page states the order: "The crew marks the pond boundary with spray paint, digs the hole, carves a plant shelf, lays underlayment and liner, sets the skimmer and BioFalls, places rocks and gravel, installs plants and lights, then fills the pond and checks for leaks", over "three to five days on site".

The fill runs in the background from the end of the rock day; a 5,000 gallon pond on a garden hose at about 8 gallons a minute takes roughly ten hours, which is why most crews start the hose before they build the stream. Decker's puts the weight of a bigger job on the stone: "Rock work is where the bulk of the time goes on a large project". That matches the Pond Trade reports, where the two day builds had many hands on the rock and the six day build had three people.

Koi ponds and why they run longer

A koi pond adds steps the ecosystem sequence does not have, and most of them involve waiting for concrete. Ben Cooke at Play It Koi describes setting a bottom drain in a liner pond on "a concrete pad approximately 24 inches square and 4-6 inches thick", with the 4 inch pipe sloping "1/8 to 1/4 inch per foot" to the filter, and says "adding one to three bottom drains to the construction timeline adds roughly 1-2 days of work (excluding concrete cure time)". For block and render construction, the Koi Water Garden build diary of a 1,700 gallon pond reports "The base was allowed to cure for 48 hours before construction of the walls commenced", a collar poured "around the outside lower perimeter of the newly constructed block wall" about 8 inches deep, and "The render was allowed to cure fully over the next week" before painting. Waits like these help explain why California Aqua Pros' koi range reaches three weeks, and why a retrofit is a different job altogether: Play It Koi puts a bottom drain retrofit at "1-3 weeks from draining to refilling" and advises planning "at least 2-4 weeks" of temporary housing for the fish.

Where the sources differ

The spread on an ecosystem pond, three days at Sweetwater to about four at Premier to "3 Days to 2 Weeks" at Decker's, is mostly a spread in what each company calls average. Premier's four days assumes a four or five person crew; Decker's upper end covers long streams and heavy rock. The Pond Trade reports show crew size moving the number more than pond size does. Dave Stoup had more than 25 contractors build a 30 by 24 foot, 4 foot deep pond with a bog filter and 20 foot stream "in about two days", then writes "If my two guys and I were to do this job ourselves, it would have taken us over a month", with "about two weeks for my guys to wrap up the small details after the weekend was over". Jordan Morris reports the 22 by 50 foot pond and 70 foot stream at Shaquille O'Neal's Atlanta home, with "85 tons of moss rock and 35 tons of river rock", as "The three-day project was extended to four days". The 11 by 16 foot training pond done in one day and Stoup's estimate of more than a month for his own crew of three are the same work at different headcounts.

At 1,000 gallons the whole job fits Grass Roots' one to two day tier, so the liner hours and the rock day set the schedule. At 20,000 gallons the dig alone needs a machine for a day or two (Decker's: "Excavation is usually done in the first day or two"), rock arrives by the truckload, and California Aqua Pros' week to week and a half is the realistic middle.

What stretches a build

The contractors name the same culprits. Premier says "Loose soil is easy to dig out but clay is tough to get through" and that tree roots "will get in the way". California Aqua Pros says "a tight side yard or a hillside in Danville slows the heavy work", clay and uneven ground add excavation time, and "The weather can pause digging during heavy winter rain". Ponds By George says a backyard "accessible only by hand-carrying materials" can add time, and low voltage lighting or tying the stream into an existing patio "requires extra time". Decker's lists "late scheduling, permit timelines on recreation ponds, extended heavy rain during excavation, and material lead times on specialty items", and notes that recreation ponds are permitted like inground pools in New York municipalities. Add to those a long plumbing run to a remote filter pad, which means trenching and gluing pipe, and on a koi pond the concrete collars and pads, each of which stops work while it cures. Decker's also points out that the build is the short part: design runs "1 to 3 Weeks", spring slots are "claimed months in advance", and "The pond takes the same number of days to build whether you sign in November or April."

What to do

1. Settle the design before the crew is booked. In the PondTools studio the pond outline is traced over a satellite or drone photo and rendered in 3D with the rock, stream and planting, so the homeowner approves the look before the excavator arrives and the crew does not spend day one redrawing the shape with a hose.
2. Take gallons, surface area and liner size from the trace in the PondTools app, which computes them from the traced outline and depth so the liner is on site before the dig and the fill time is known. If you only have the measurements, the PondTools liner calculator (also standalone) takes the longest span, the widest span, the maximum depth, the buried overhang and a fold allowance. The same numbers feed our guide to estimating and quoting a pond build.
3. Schedule the job in the Aquascape order: set the skimmer, filter and pipe first, then dig, lay the liner, place the rock, and build the stream and finish. Order rock for delivery on the evening of the dig day so the rock day is not a waiting day.
4. Walk the access route with the client before quoting. Every load of stone that has to be carried through a gate by hand adds time to the rock day.
5. For a koi pond, put the concrete pad and collar pours on their own days and let them cure before the liner goes on; do not plan the liner for the morning after a pour.
6. Do not promise fish on fill day. Decker's puts fish in "Typically one to two weeks after startup", once the bacteria are established. If this is a first build from a kit, our first pond kit article covers what the box does and does not include.

Sources

• How Long Does It Take To Build A Pond In A Backyard, Premier Ponds
• What Happens During a Pond Installation, Premier Ponds
• How Long Does It Take to Build a Pond, Decker's Pondscapes
• How Long Does It Take to Build a Backyard Pond, California Aqua Pros
• How Long Does it Take to Build a Pond in Your Yard, Grass Roots Pond and Garden
• How long does it take to construct a pond or water feature, Sweetwater Landscape
• FAQ, PondScape
• Pondless Waterfall Installation Timeline, Ponds By George
• DIY Koi Pond Kit, 20 steps, Aquascape Construction
• Building Your Own Pond with an Aquascape Pond Kit, Aquascape Australia
• Aquascape Academy, Aquascape Inc (quoted from a search snippet; the page refuses automated fetches)
• Build a Pond and Patio Day, Brent Hullinger, Pond Trade Magazine
• Decide Your Priorities, Build Your Best Pond, MJ Wilson, Pond Trade Magazine
• Pond World Unites for Large-Scale Build, Dave Stoup, Pond Trade Magazine
• Aquatic Dream Team Builds Large-Scale Water Feature for Shaquille O'Neal, Jordan Morris, Pond Trade Magazine
• Pond Construction with Concrete, Demi Fortuna, Pond Trade Magazine
• Bottom Drain Installation Guide: New Build & Retrofit, Ben Cooke, Play It Koi
• Koi pond construction, Koi Water Garden