By the UK Pool Guide – Home Swimming Pools, Reviews & Advice Team · Updated May 2026 · Independent, reader-supported

Fibreglass Pools UK – Best Brands, Installers & Kit Prices Explained

Fibreglass pools (also called GRP or glass reinforced plastic pools) have become the most popular choice for UK homeowners wanting a bespoke swimming pool. They offer a faster installation than concrete, better durability than vinyl, and a smoother finish that's easier to maintain. If you're considering one, understanding the shell options, installation process, and actual costs will help you make an informed decision.

What Makes Fibreglass Pools Different

A fibreglass pool is a rigid, pre-formed shell manufactured off-site and installed in your garden. The shell is made from layers of fibreglass mat and polyester resin, creating a durable structure that lasts 25–30 years or more with proper care. The finish is typically a gelcoat layer that gives a smooth, non-porous surface—unlike vinyl, which can tear, or concrete, which cracks and needs replastering.

The main advantages are straightforward: no leaks from punctures (the shell is solid), fewer algae problems due to the smooth surface, and a quicker installation timeframe—usually 4–6 weeks from delivery to completion, compared to 8–12 weeks for concrete. The downside is less flexibility in shape and size; you're buying what the manufacturer offers, though most suppliers do provide a range of depths and dimensions.

GRP Shell Options and Manufacturers

The UK's main fibreglass pool suppliers include Compass Pools, Leisure Pools, Quartermaine Pools, and Doughboy. Each offers different shell designs, colours, and features.

Compass Pools is the largest, with over 40 designs ranging from 4m to 15m lengths. Their shells come in standard colours (white, grey, beige) and they offer various depth options. Most designs feature sloped or graduated depth, making them suitable for families.

Leisure Pools focuses on mid-range and premium shells, often with integral spa jets or tanning ledges. Their designs tend to have more decorative finishes.

Quartermaine Pools supplies more bespoke options and works closely with installers to customise details like integrated seating or beach-entry slopes.

Doughboy offers rigid-wall alternatives (their signature style) alongside fibreglass, so worth comparing if you're open to different construction methods.

Colours matter more than you might think. Darker colours (charcoal, slate blue) make the water appear deeper and warmer, while lighter colours (white, pale blue) reflect heat and look crisp. Price differences between colours are minimal—usually £1,000–£2,000.

Planning Permission and Building Regulations

Before ordering, check whether you need planning permission. In England and Wales, a pool isn't usually a "building" requiring planning permission if it's:

• More than 2 metres from the boundary
• Not a permanent structure with a roof
• Below a certain size (varies by council)

However, you always need building regulations approval. The installer's surveyor will arrange this with your local authority. Expect to budget £500–£1,000 for building control sign-off.

If your garden is listed or in a conservation area, planning permission is likely required—check with your council early. Delays here can add 6–8 weeks to your project.

Installation Costs and Quotes

The total cost includes the shell, excavation, groundworks, plumbing, filtration, and labour.

• Shell cost: £12,000–£35,000 depending on size and manufacturer. A 7m × 3.5m Compass shell typically costs £15,000–£20,000.
• Installation labour: £8,000–£15,000. This covers digging, levelling, surrounding brickwork or paving, and connecting pumps and filters.
• Pump and filter system: £3,000–£7,000 for a quality sand filter and variable-speed pump. Budget more if you want heating.
• Extras: Steps, coping, decking, and safety features add £2,000–£10,000.

A complete, ready-to-swim pool typically costs £25,000–£60,000. Many installers offer financing over 3–5 years at 5–8% APR if that helps.

Always get three quotes. Reputable installers (usually SPATA members—the Swimming Pool & Allied Trades Association) will visit your garden, assess drainage, and provide a fixed quote. Reject any quote that seems significantly cheaper; corner-cutting on groundworks causes problems later.

Ongoing Maintenance and Running Costs

The appeal of fibreglass is lower maintenance than concrete. Weekly testing and balancing of chlorine and pH is standard, but you'll spend less time brushing and shocking the pool. Annual costs typically run:

• Chemicals: £400–£700
• Electricity (filtration and heating): £600–£1,500 depending on usage and whether you heat
• Servicing pump/filter: £150–£300

A heat pump will double your electricity costs but makes the pool usable from May through September rather than July–August only.

How Fibreglass Compares

Concrete pools are cheaper initially (sometimes) but cost more to maintain and resurface every 10–15 years. Vinyl pools are cheaper upfront but the liner lasts only 10 years and punctures are an ongoing risk. Fibreglass sits in the middle: more expensive than vinyl, but more durable and less hassle than concrete.

Next Steps

Once you've chosen a shell and installer, think about pool covers (essential for safety and heat retention) and whether heating is right for your budget. Both significantly extend your swimming season in the UK climate.

Get quotes from at least three SPATA-registered installers. Most will provide a written specification covering soil conditions, building regulations requirements, and the complete installation package—this transparency is a good sign.