Seastream 34 Buyer's Guide
Shopping the brokerage market for a used Seastream 34 means weighing a 34-foot British cruiser launched from 1978 onward, with solid fibreglass construction and a choice of ketch or sloop rig. Built by Seastream Yachts Ltd. and a handful of subcontract yards, the design carries 6,000 pounds of lead ballast and a 15,000-pound displacement, and individual hulls show remarkably long ownership spans.
Layouts on the Used Market
The dominant configuration is the ketch, with the sloop rig a small minority of the fleet — Django and Bella May are among the few sloop examples. Interior records note a saloon with a starboard-side steering position in at least one sloop, and the 11-foot beam with 92-gallon water and 40-gallon fuel capacity points to a voluminous cruising layout. Because finishing yards varied — Seastream, Wilson Manning, Southern Boatbuilding, and Camus Marine all appear in hull histories — the internal joinery and systems routing can differ from one boat to the next even within the same year.
Equipment and Common Upgrades
On the used market, chartplotter, life raft, spinnaker, and autopilot are commonly fitted. Less universal but seen on some boats are heating, hot water, and bimini — these tend to be owner additions rather than factory standard. Power and energy systems deserve a close look: bow thrusters appear on several hulls, and engine replacements range from a 2017 Yanmar in Ruddles to a 2011 Nanni in Moonbird, so confirm what drives the boat in front of you.
What to Inspect
The clearest documented failure mode is prolonged shore storage without care: one demonstrator hull was lifted out to fit a bow thruster and then remained ashore for 30 years to rot, so inspect any boat with a long lay-up period for hull degradation, soft spots, and rigging corrosion rather than assuming soundness from the original Lloyds build. Verify the exact engine installed — Mercedes OM636, Perkins 4108, Volvo Penta, Vetus, Ford Watermota, and others all appear across the fleet — by matching the plate to the hull record, since spares and survey criteria differ sharply by make. Where a bow thruster was added, check the through-hull penetration and bedding for leakage or stress cracking in the surrounding glass.
Availability and Buyer's Takeaway
Seastream 34s typically appear in the United Kingdom, Greece, and Germany. Before committing, run through this short checklist:
- Confirm the rig type and whether the ketch or sloop suits your plans
- Match the engine make and year to the individual hull documentation
- Inspect for rot or delamination if the boat sat ashore for years
- Check bow-thruster penetrations for bedding failure
- Verify Lloyds-standard hull integrity with a surveyor familiar with solid GRP
Price & volume trends
Monthly asking-price and listing-volume trends for the Seastream 34. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 4 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 2 | $46,418 | — |
| Oct 25 | 1 | $40,787 | -12.1% |
| Dec 25 | 1 | $40,787 | 0.0% |
| May 26 | 5 | $54,319 | +33.2% |
Where they're listed
Seastream 34 listings appear across 3 countries. United Kingdom has the most listings with 4 (50.0%), followed by Greece and Germany.
Country view
8 listings · 3 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| United Kingdom | $54,319 | 4 | 0 | 50.0% |
| Greece | $40,787 | 3 | 0 | 37.5% |
| Germany | $42,535 | 1 | 0 | 12.5% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
6 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Najad 34 | 34.28' | $ 41,315 | 41 | 13 |
| Pacific Seacraft Crealock 34 | 34.08' | $ 105,000 | 21 | 6 |
| Sparkman and Stephens S&S 34 | 33.42' | $ 27,385 | 17 | 3 |
| Sweden Yachts C34 | 34' | $ 51,277 | 12 | 3 |
| Sea Sprite 34 | 33.84' | $ 28,000 | 11 | 5 |
| Seastream 34You are here | — | $ 42,535 | 9 | 0 |