Stonemasons
Build stone structures, such as piers, walls, and abutments. Lay walks, curbstones, or special types of masonry for vats, tanks, and floors.
7,820 people do this job in the US. $57,390 a year.
of the working time. Estimate.
- 0%
- 0%
- 100%
Measured, from Anthropic's usage data (2025). Counts help on part of a task.
On the chosen pace and reliability. Estimate.
Share of the working time within reach, now to 2030
What each choice means: , , , , . Every pace starts from .
At this date and pace, models finish tasks up to 4.4 h long four times in five.
How far this has come
With GPT-4, measured in March 2023, 0% of this job's working time was within reach at . With Claude 3.7 Sonnet, measured in February 2025, 0%. With Claude Mythos Preview (early), measured in April 2026, 0%. Today's estimate: 0%.
A backcast: today's task data with the best model METR had measured by each date. It shows how fast the models have moved, not what anyone forecast at the time.
The tasks
Sorted by . 16 tasks from .
| Task | Kind | |||
|---|---|---|---|---|
| Lay brick to build shells of chimneys and smokestacks or to line or reline industrial furnaces, kilns, boilers and similar installations.Done more than yearly by most who do it. | 22% | 6.7 h2.5 h to 2.1 work days | Stays with people | |
| Shape, trim, face and cut marble or stone preparatory to setting, using power saws, cutting equipment, and hand tools.Done daily by most who do it. | 19% | 1.7 h25 min to 3.3 h | Stays with people | |
| Set stone or marble in place, according to layout or pattern.Done hourly or more by most who do it. | 11% | 38 min13 min to 1.7 h | Stays with people | |
| Construct and install prefabricated masonry units.Done more than monthly by most who do it. | 8% | 2.5 h50 min to 6.7 h | Stays with people | |
| Smooth, polish, and bevel surfaces, using hand tools and power tools.Done more than monthly by most who do it. | 7% | 1.7 h25 min to 3.3 h | Stays with people | |
| Remove wedges, fill joints between stones, finish joints between stones, using a trowel, and smooth the mortar to an attractive finish, using a tuck pointer.Done more than weekly by most who do it. | 7% | 50 min17 min to 1.7 h | Stays with people | |
| Clean excess mortar or grout from surface of marble, stone, or monument, using sponge, brush, water, or acid.Done more than weekly by most who do it. | 5% | 33 min13 min to 1.3 h | Stays with people | |
| Lay out wall patterns or foundations, using straight edge, rule, or staked lines.Done more than weekly by most who do it. | 5% | 50 min25 min to 2.5 h | Stays with people | |
| Mix mortar or grout and pour or spread mortar or grout on marble slabs, stone, or foundation.Done daily by most who do it. | 4% | 25 min13 min to 50 min | Stays with people | |
| Set vertical and horizontal alignment of structures, using plumb bob, gauge line, and level.Done more than weekly by most who do it. | 3% | 25 min13 min to 50 min | Stays with people | |
| Replace broken or missing masonry units in walls or floors.Done more than monthly by most who do it. | 3% | 1.3 h38 min to 3.3 h | Stays with people | |
| Drill holes in marble or ornamental stone and anchor brackets in holes.Done more than yearly by most who do it. | 2% | 38 min17 min to 1.3 h | Stays with people |
Within reach, per task: the share of the task's time whose instances are short enough for a model to finish at the chosen date, pace and reliability. Half by: the date half of that time comes within reach.
Jobs that share skills with this one
From O*NET's related occupations. Within reach now and by the end of 2028, long-run pace, four in five.
- Brickmasons and Blockmasons12% now, 13% by 2028
- Tile and Stone Setters4% now, 4% by 2028
- Stone Cutters and Carvers, Manufacturing5% now, 5% by 2028
- Terrazzo Workers and Finishers3% now, 3% by 2028
- Helpers--Brickmasons, Blockmasons, Stonemasons, and Tile and Marble Setters6% now, 6% by 2028
- Cement Masons and Concrete Finishers0% now, 0% by 2028
Where this job works
The industry groups that employ the most of it (BLS, May 2025).
Where the most of these jobs are
The metro areas with the most people in it (BLS, May 2025).