Product classification
HS code for Building blocks: 6810.11
Cement, concrete or artificial stone, building blocks or bricks, whether or not reinforced.
Classification of building blocks under HS 6810.11
Building blocks made of cement, concrete, or artificial stone are classified under HS code 6810.11. This classification falls under Chapter 68, which covers articles of stone, plaster, cement, asbestos, mica, or similar materials. Heading 6810 specifically encompasses articles of cement, concrete, or artificial stone, whether or not they are reinforced with metal or other materials. The subheading 6810.11 is specifically reserved for building blocks and bricks. These items are characterized by their use in the construction of walls, foundations, and other structural elements. The classification is determined by the material composition—primarily a binder like Portland cement mixed with aggregates—and the fact that they are manufactured or molded products rather than natural stone. Even if the blocks contain steel reinforcement (rebar), they remain under this code because the concrete provides the essential character of the building component.
- Covers
- Concrete masonry units (CMU)
- Cinder blocks
- Aerated autoclaved concrete (AAC) blocks
- Precast concrete building blocks
- Artificial stone bricks for structural use
- Also under 6810.11
- Oldcastle APG (Belgard blocks)
- CEMEX (concrete blocks)
- CRH (concrete masonry)
- Boral (concrete bricks)
Codes often confused with 6810.11
Common mistake. Building blocks are often confused with ceramic bricks, which are classified under HS code 6904.10. The distinction lies in the material: 6810.11 is for cement/concrete, while 6904.10 is for fired clay. Another common error is classifying them under 6802 if they look like natural stone; however, if they are made from stone dust and a binder (artificial stone), they must stay in 6810. Toy building blocks are classified under 9503.00.
Top exporters and importers of HS 681011 (the code used for building blocks), 2025
In 2025, the largest exporter of HS 681011 (the code used for building blocks) in UN Comtrade data was Germany, with 18% of world exports; the largest importer in UN Comtrade data was Belgium, with 8.0% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 681011, not only building blocks.
Top exporters 2025 · share of world exports
- 1 Germany $153M 18% of world exports
- 2 Netherlands $89M 10% of world exports
- 3 China $70M 8.0% of world exports
World total: $872M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Belgium $65M 8.0% of world imports
- 2 Netherlands $59M 7.1% of world imports
- 3 United States $54M 6.5% of world imports
World total: $822M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for building blocks
Brazil classifies building blocks under NCM 6810.11.00: HS 6810.11 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about building blocks
What is the HS code for Building blocks?
The HS code for Building blocks is 681011 (Cement, concrete or artificial stone; building blocks or bricks, whether or not reinforced). The HS code for building blocks and bricks made of cement, concrete, or artificial stone is 6810.11.
How do I classify Building blocks for customs?
Building blocks is classified under HS code 681011 — Cement, concrete or artificial stone; building blocks or bricks, whether or not reinforced. This is a 6-digit subheading level code.
Are reinforced concrete blocks classified differently?
No, HS code 6810.11 includes blocks whether or not they are reinforced with metal or other materials.
Which countries are the top exporters of building blocks (HS 681011)?
In 2025, the top exporters of HS 681011 (the code used for building blocks) in UN Comtrade data were Germany ($153M, 18% of world exports), the Netherlands ($89M) and China ($70M). World exports came to about $872M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of building blocks (HS 681011)?
In 2025, the top importers of HS 681011 (the code used for building blocks) in UN Comtrade data were Belgium ($65M, 8.0% of world imports), the Netherlands ($59M) and the United States ($54M). World imports came to about $822M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Building blocks the same in all countries?
The base HS code 681011 for Building blocks is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for building blocks in Brazil?
In Brazil, building blocks (HS 681011) is classified under NCM 6810.11.00.