Nothing slows a bathroom project down like the wrong bath size. A bath that doesn’t fit, clashes with pipe runs, or eats into the door swing can derail a handover, trigger costly rework, and frustrate both client and contractor. The idea of a “standard UK bath size” is often thrown around, but the reality is more nuanced.
This guide cuts through the confusion, laying out the most common UK bath dimensions, and why getting them right matters.
The Standard UK Bath Size Myth
Ask three different suppliers about the standard bath size in the UK and you’ll likely hear three different answers. While 1700 x 700mm baths are the most common, variations in width, depth, and style mean there’s no true one-size-fits-all.
For example, even if you’ve planned for a 1700 x 700mm straight bath, tolerances of just 10–20mm can affect how it lines up with walls, boxing, or waste positions. That’s why site-specific measuring always trumps catalogue assumptions.
Straight Baths – The UK Workhorse
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1700 x 700mm: The most widely used bath size in the UK. Suits most new-build homes and refurb projects.
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1600 x 700mm or 1500 x 700mm: Compact options for tighter spaces, like ex-local authority properties or box rooms.
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Width ranges: Typically 700–750mm. Wider baths (up to 800mm) are available but need careful planning.
Tip: Reinforced models (like Carronite) are ideal where rigidity matters and studwork isn’t perfectly square.
Compact Baths for Tight Spaces
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1400–1500mm long x 700mm wide
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Often deeper (400–450mm water depth) to make up for reduced length.
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Ideal for loft conversions, ensuites, or bathrooms where space is at a premium.
Double-Ended and Deep Soaker Baths
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Lengths: 1700–1800mm
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Widths: Up to 800mm
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Features: Central taps and waste, allowing comfortable bathing at both ends.
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Great for family use or assisted bathing.
Shower Baths (L- and P-Shaped)
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Standard L-shaped bath size: 1700 x 850mm (at the showering end).
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Base width: 700mm, flaring out where the shower screen fits.
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Perfect when a bath needs to double as a comfortable shower space.
A Note on Bath Heights and Tolerances
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Height (including panel): 550–600mm from finished floor to rim.
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Allowances: Always leave 2–3mm tolerance for acrylic flex and wall unevenness.
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Wall gap: 5–10mm at the wall side for tiling and silicone.
Freestanding Baths: When Size and Style Matter
While straight and shower baths dominate the UK market, freestanding baths are increasingly popular for both modern and traditional projects. They don’t box against the wall, meaning dimensions are crucial when planning your layout.
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1700 Freestanding Bath / Freestanding Bath 1700
A versatile choice for medium-sized bathrooms. Options such as the Valentina Freestanding Bath offers the full impact of a freestanding design without overwhelming the space. -
1700 x 700 Freestanding Bath (also called a Freestanding Bath 1700 x 700)
Slimmer, space-conscious, and a smart upgrade for homes that want statement style without losing floor area. -
1200 Bath
In very compact bathrooms, a 1200 bath can still deliver practicality. While not always freestanding, it’s a strong option where space is extremely limited.
For larger layouts, bigger designs like the Naxos Freestanding Bath (1800 x 800mm) or the Oregon Freestanding Bath (1850 x 850mm) provide true centrepiece appeal, while compact models such as a 1700 freestanding bath offer a balanced, highly sought-after size.
The Takeaway
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Measure finished wall-to-wall dimensions before ordering.
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Match bath size to both the room and the client’s lifestyle.
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Don’t assume “close enough” is good enough—10mm off can cause costly rework.
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For timeless installs, the 1700 x 700 bath remains the UK standard, but don’t overlook the impact of a well-chosen freestanding bath for projects with space to spare.
The right bath fits first time—no delays, no callbacks, and no compromises.
Browse our full bath range to find the perfect fit for your next project.