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Hallberg-Rassy 31

1992–2009 · designed by Germán Frers · built by Hallberg-Rassy Varvs AB

Designed by Germán Frers as the smallest model in Hallberg-Rassy's contemporary range, the HR 31 is a compact coastal-to-offshore cruiser for a couple, built to HR's usual heavy solid-glass, skeg-rudder standard rather than for speed. The Mk II (from model-year 2006, hull 307 on) updated the interior and cockpit but kept the same hull and keel. It carries HR's conservative, well-engineered blue-water reputation into a smaller, easier-to-handle package than the yard's 34-and-up models.

This is a general read on the Hallberg-Rassy 31 class — informed background, not a verdict on any individual boat. Condition, refit history, and how a particular hull was sailed and stored matter far more than class reputation. Use it to know what to look for; for a read on a specific listing, run a free FairKeel report on that boat.

At a glance

Hull form: Fin Keel
Ballast type: Bolt On Lead
Rudder: Skeg Hung
Mast step: Deck Stepped
Hull construction: Fiberglass
Production: 1992–2009
Built in: Sweden

What the Hallberg-Rassy 31 is known for

Frers-designed hull with a balanced helm and good sea manners for a 31-footer, better mannered than most production boats its size.
Hallberg-Rassy build quality: heavy solid-glass layup, quality hardware, and a skeg-hung rudder that resists grounding damage far better than a spade.
Strong brand reputation gives better resale liquidity and easier insurance/financing than lesser-known 31ft cruisers of the same era.
Fractional rig with modest sail area is simple to reef and handle short-handed.

Known trade-offs

Modest interior volume for sustained two-up cruising, especially the pre-2006 Mk I layout, compared with beamier modern 31-footers.
Moderate performance — heavier displacement and a conservative fin trade speed for comfort and seakeeping.
Early hulls (1992-late 1990s) are now 25-30+ years old; engine, rigging, tankage and upholstery on an unrestored example are likely original and due for renewal.

Age-related quirks to expect

Mk I to Mk II transition at hull 307 (model year 2006): updated interior, cockpit and equipment on the same hull and keel severity: Low affects: 2006-2009 (Mk II)

Original engine approaching or past service life on early hulls severity: Medium affects: 1992-late 1990s

Original standing rigging now well past the typical 15-20 year service window on unrepaired boats severity: Medium affects: 1992-2009 (age-driven)

Deck core moisture at aging hardware penetrations and sealant failures severity: Medium affects: 1992-2009 (age-driven)

Original tanks, hoses and interior fit-out dated on unrestored Mk I examples severity: Low affects: 1992-2005 (Mk I)

Systems to check before you buy

Standing rigging and chainplates priority: offshore, liveaboard

Fractional rig now 20-30+ years old on unrepaired hulls; inspect swage terminals, rod/wire condition and chainplates for crevice corrosion before an offshore commitment.

Engine and drivetrain (Volvo Penta) priority: motor, offshore

Original diesel is aging on pre-2000 hulls; verify logged hours, cooling-system condition, and shaft seal/cutless bearing wear, and budget for a repower if it's original and high-hour.

Deck core and hardware penetrations priority: offshore, coastal, liveaboard

Moisture-meter survey around stanchion bases, chainplates and portlights for wet core under decades of hardware penetrations and sealant cycles.

Keel bolts and keel-hull joint priority: offshore

External lead fin keel is through-bolted; inspect keel bolts for corrosion/stretch and reseal the keel-hull seam, especially on hulls with any grounding history.

Tanks, hoses and interior systems vintage priority: liveaboard, coastal

Pre-2006 Mk I equipment (tanks, hoses, upholstery, electronics) is now dated on unrestored boats; budget for a refresh scaled to hull age.

How it fits your plans

Offshore: The Frers hull, skeg-hung rudder and HR's solid-glass construction make the 31 a credible small-boat offshore cruiser, but tankage and stowage for two are tight on longer passages compared with HR's larger models.
Coastal: Very well suited: comfortable motion, easy handling, and strong resale make it a low-drama coastal cruiser.
Liveaboard: Workable for a couple short-term; interior volume is modest for full-time liveaboard use next to newer, beamier 31-footers.
Weekending: Excellent — easy to shorthand, comfortable cockpit, and a rig sized for a short-handed crew.
Motor: Modest diesel range under power; not built or intended as a motorsailer.

This guide is the class. A report is that hull. Paste the listing you're looking at and FairKeel grades every claim in it against what's known about the Hallberg-Rassy 31 — where the evidence is thin, the red flags worth a second look, the costs likely to land in your first season, and whether the boat suits the plans you describe in a few short questions.

It won't read the photos or put a number on the boat — that's the Deep-Dive, and for the real answer, a surveyor. It will tell you when a Deep-Dive isn't worth buying. Free, no account, usually a minute or two.

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