A Polmenna pool at dusk
Bespoke pool construction · The Roseland, Cornwall

5 or 6 exceptional pools each year... by design.

From contemporary plunge pools to natural swimming pools, we take care to design and build beautiful spaces that become the heart of your home.

Who we are

A builder and a vet walked into a garden…

Polmenna Pools was founded in 2021 by two neighbours on the Roseland: Llewellyn Rounsevell, a local builder whose firm LSR Construction has shaped homes across Cornwall, and Luke Gamble, a vet who moved to the peninsula the same year and brought a surgeon's obsession with doing things properly.

It's an unusual partnership, and it's exactly why our pools are different. One of us has spent a career getting groundworks, drainage and structure right in Cornish conditions. The other treats every plant room like an operating theatre.

We're not a national franchise and we don't sell kits. We take on five or six projects a year, each with a dedicated project manager, and we're on site — personally — for all of them.

2021Founded on the Roseland
5–6Pools built each year
3Pools on Unique Homestays
Llewellyn Rounsevell and Luke Gamble on site
Llewellyn & Luke, on site
As featured

Three of our pools star on Unique Homestays

Unique Homestays hand-picks the most extraordinary holiday homes in Britain. Guests at these three properties swim in pools we built — or, at Lightkeepers, brought back to life.

The pool at Forestkeepers

Forestkeepers

A pool built to sit quietly within the trees — dark, calm and heated for year-round swims.

The pool at The Marlings

The Marlings

Clean lines and warm stone; a family pool that photographs as beautifully as it swims.

The pool at Lightkeepers

Lightkeepers

Refurbished and fitted with a full safety cover to make the pool holiday-let ready — on a deadline.

Polmenna pool under construction
Every stage, done properly
Straight answers

What does a pool actually cost?

Most pool companies make you fill in a form to find out. We'd rather tell you now:

A typical 11m × 4.9m heated family pool, complete and swimming, is around £120,000.

Smaller pools cost less; infinity edges, pool rooms and extensive landscaping cost more. Every project is quoted individually, in writing, before a spade goes in the ground — and the number we quote is the number you pay.

How we work

From first sketch to first swim

Every project starts with a visit. We walk the site with you, talk honestly about access, ground conditions and budget, and produce proper pool drawings before anything is agreed. Construction is managed start to finish by a dedicated project manager, working with equipment from Ambassador Pools and Paragon — and when the pool is filled, we don't disappear: we hand over with a maintenance kit, a first season of chemicals on our complete packages, and a phone number that actually gets answered.

If you'd like to see a finished Polmenna pool in person before committing, we'll happily arrange a visit to one of our recent builds on the Roseland.

The deep end

Thinking about a pool?

The best first step is a conversation. Tell us about your garden, your house and what you'd like to build, and we'll tell you honestly whether we're the right people for it.

01872 859558