Best Drainage & Septic Tanks in Co. Derry
Ranked by Google ratings — updated 25 October 2026
As of 25 October 2026, LocallyIrish.ie ranks 4 drainage & septic tanks in Co. Derry by customer rating. The top-rated is Drain Jetters NI, with 5.0 stars from 77 Google ratings. ARK Gardening follows with 5.0 from 43 Google ratings.
How we rank
Each business is scored on its average rating weighted by how many ratings it has, so a handful of perfect scores cannot outrank hundreds of near-perfect ones. Reviews left on LocallyIrish.ie and the business's Google rating are counted together; the rating shown on each entry is labelled with its source. A Google rating needs at least 5 ratings to count. Businesses without enough ratings are listed separately, unranked. Paid listings cannot buy a higher position. The list refreshes hourly.
Drain Jetters NI
Gold · 2026 Top RatedARK Gardening
Silver · 2026 Top Rated
North Coast Drains
Bronze · 2026 Top Rated
M-Tech Plumbing & Heating
Also in Co. Derry — not enough ratings to rank yet
Best drainage & septic tanks by town
Best drainage & septic tanks in Derry — FAQs
What is the best drainage & septic tanks in Derry?
Drain Jetters NI is currently the top-rated drainage & septic tanks in Co. Derry, with 5.0 stars from 77 Google ratings. See the full ranked list above.
How are the best drainage & septic tanks in Derry ranked?
Each business is scored on its average rating weighted by how many ratings it has, so a handful of perfect scores cannot outrank hundreds of near-perfect ones. Reviews left on LocallyIrish.ie and the business's Google rating are counted together; the rating shown on each entry is labelled with its source. A Google rating needs at least 5 ratings to count. Businesses without enough ratings are listed separately, unranked. Paid listings cannot buy a higher position. The list refreshes hourly.
How can my drainage & septic tanks business rank higher in Derry?
Encourage happy customers to leave a review on your LocallyIrish.ie listing. More high-star reviews move you up the "Best of" ranking for Co. Derry.
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