Block landing · triangular wash basin cad block dwg
Triangular wash basin CAD blocks in DWG
By Sumana Kumar · Published 24 Aug 2025 · Updated 24 Aug 2025
A triangular wash basin is the corner specialist of the basin world: two straight sides meet the walls and a curved or angled front faces the room, so it slots into a corner that a rectangular or oval basin would waste. That triangular plan is the whole point, and a generic basin block won't represent it. This page gathers free triangular wash basin CAD blocks in DWG, drawn to true millimetre dimensions and ready to insert into AutoCAD 2004 or later — free for personal and commercial work, with no signup, no watermark and no credit required.
These basins live in the tightest rooms: cloakrooms, under-stair WCs, compact en-suites and small apartment bathrooms where a corner is the only place a basin will fit. Because the block is drawn to scale with its two wall sides and projecting front, you can prove it clears the door and leaves standing room the moment it lands in the corner of your plan.
Why a triangular basin needs a dedicated block
Most basin blocks are drawn to sit flat against a single wall. A triangular basin instead meets two walls along its straight back edges and presents its bowl to the room across the diagonal front, so its plan footprint and its clearance behave like a corner fixture, not a wall-hung one. Dropping a rectangular basin into a corner overstates the space used and misses the tidy corner fit that justifies the choice.
The blocks here draw the two wall sides, the front profile and the tap and waste positions correctly so the corner layout is honest. They sit on a sanitaryware layer you can isolate, and because the front projects on the diagonal, the block makes the usable standing space in front of the basin immediately readable — the figure that decides whether a tiny room works.
Plan view does the deciding
For a triangular basin the plan view carries the decision, because the reason to choose this basin is purely how it fits the corner. The plan shows the two straight sides hugging the walls and the bowl reaching into the room, which is what you check the door swing against and dimension to the adjacent fixtures.
An elevation still matters for the tap height and the splashback tiling, and the rim height sits much like any basin. But a triangular basin is selected on a plan judgement: does it recover enough floor in this particular cloakroom to make the layout viable. Place the plan block first, test the room against the door and the WC, then build the elevation once the position is settled.
Typical sizing and clearances
Keep these ranges in mind when placing a triangular basin. The straight sides that meet the walls are commonly 350–450 mm long each. The bowl projects into the room from the corner, with the front edge typically 350–450 mm out along the diagonal. In front of the basin, allow a usable standing zone of at least 500–600 mm clear so a person can lean in to wash, more where the room permits.
These are planning envelopes, not fixed product figures — corner basins vary by manufacturer, so confirm against the specified fixture before dimensioning. The advantage the block makes visible is the corner recovering floor that a wall-hung basin would consume across a whole wall, which is exactly why triangular basins keep turning up in the smallest washrooms.
How to insert and orient the block
These blocks are drawn full size in millimetres. Insert at scale 1 in a millimetre drawing, 0.001 in a metre template, or set INSUNITS to millimetres so AutoCAD rescales on insertion. Run INSERT or drag the DWG from a tool palette, snap the straight back edges into your room corner, and use ROTATE if the corner you are filling faces a different way than the block was drawn for.
After placing, confirm the bowl projects into the room rather than into a wall, and that the tap sits against the corner where the plumbing can reach it. The triangular basin is then a single block reference you can mirror for a handed layout or copy to another corner, with edits to the definition flowing through to every instance at once.
Where triangular basins fit
Triangular basin blocks belong on the small, awkward layouts: downstairs cloakrooms, under-stair WCs, compact en-suites, studio-flat bathrooms and any plan where a corner is the only room left for a basin. They are a planner's rescue for a wall too short for a conventional basin, recovering a usable wash point from a corner that would otherwise sit empty.
Pair them with the corner-toilet and compact-shower blocks in the bathroom category to assemble a complete small-bathroom layout in a few minutes. Because the files are free and licence-clear, they suit quick feasibility sketches and concept layouts as readily as coordinated construction drawings, letting you prove a tight corner before committing to a full set.
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Questions
Frequently asked
Why use a triangular basin instead of a standard one?+
A triangular basin fits into a room corner, meeting two walls along its straight back edges, so it recovers floor that a wall-hung basin would consume along a whole wall. It is the go-to basin for cloakrooms and other tight rooms where only a corner is free.
How much room should I leave in front of a triangular basin?+
Allow a usable standing zone of at least 500–600 mm clear in front of the bowl so a person can lean in to wash, more where the room permits. The block lets you measure this directly against the door and the WC.
Which view matters most for a triangular basin?+
Work in plan for the layout, since the corner fit is the whole reason to choose this basin. Add an elevation for the tap height and splashback tiling, which line up much like any basin.
Are the triangular basin blocks free for commercial use?+
Yes. Every triangular basin block here downloads free in DWG with no signup, no watermark and no attribution requirement, and is cleared for commercial project use.
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