The 20 LEGO Parts Used in 80% of Builds:

The 20 LEGO Parts Used in 80% of Builds

Ask any experienced MOC builder what’s in their core inventory and you’ll notice something quickly: the same 20 or so parts come up over and over. Different styles, different scales, different themes, but the same essential LEGO pieces forming the backbone of nearly every build.

That’s not a coincidence. These parts earn their place through sheer versatility: they work structurally, aesthetically, and technically across dozens of building contexts. Master this list and you’ll spend less time hunting parts and more time building.

This guide breaks down the most versatile LEGO parts for modular building, why each one matters, how to use it, and how to build a smart inventory around them. Whether you’re just starting your first custom modular building or scaling up a full MOC production run, this is the parts list that changes how you shop and build.

What Makes a LEGO Part “Versatile” for Modular Building?

Versatility in LEGO parts comes down to a simple question: how many problems does this piece solve?

The most versatile LEGO parts share several qualities. They work in multiple orientations, standard stacking, SNOT techniques, and sideways builds alike. They come in a wide range of colours, particularly the neutral tones that dominate modular architecture: Light Bluish Gray, Dark Bluish Gray, Tan, Dark Tan, White, and Black. These pieces are compatible with advanced building techniques like offset geometry, bracket layering, and stud-free surfaces.

Critically, the best parts for modular buildings are also available in bulk without breaking the budget. A piece that only appears in a handful of sets, or only comes in one or two colours, will bottleneck your builds no matter how clever the design.

The 20 parts in this list hit every one of those marks. They’re the pieces that show up in 80% of modular and city-scale MOCs, and for very good reason.

Core Structural Parts Every Builder Should Stock

Structure comes before style. These are the parts that form walls, floors, foundations, and the internal skeleton of every modular building. You can never have too many.

Part Type	Why It’s Important	Best Colors	Bulk Recommended?
1×2 & 1×4 Bricks	Core wall building	LBG, Tan, DBG	Yes
2×2 & 2×4 Bricks	Structural mass	Neutral tones	Yes
1×6 & 1×8 Plates	Reinforcement layers	Hidden colours	Yes
Baseplates	Foundation for builds	Green, Gray	Yes

1. 1×2 Brick: The single most important structural piece in any builder’s inventory. Used in walls, columns, and layer transitions everywhere, in every build. Stock LBG, Tan, DBG, White, and Black in large quantities.

2. 1×4 Brick: Spans further than a 1×2 while maintaining the same wall thickness. Essential for long wall runs and window infill. Same colour priorities apply.

3. 2×4 Brick: The default mass-building brick. Used where structural strength matters more than visual refinement. Great for internal walls and hidden load-bearing layers.

4. 1×6 and 1×8 Plates: These longer plates are the glue that holds multi-layer builds together. They rarely appear on the surface but provide critical reinforcement between brick courses. Buy them in colours you’ll never see, they’re working inside the wall.

5. Baseplates (32×32): Every city and modular layout starts here. Grey baseplates establish road and urban surfaces; green baseplates anchor parks and residential settings. They set the grid that everything else follows. Non-negotiable for scalable city building.

SNOT & Offset Parts That Unlock Advanced Builds

SNOT — Studs Not On Top — is the technique that separates beginner modular builds from professional-looking MOCs. These parts make it possible to attach tiles, plates, and bricks horizontally, creating the recessed details, smooth facades, and layered surfaces that define great architecture.

Part Type	Why It’s Important	Best Colors	Bulk Recommended?
1×1 Headlight Brick	Tight SNOT detailing	LBG, Tan	Yes
1×2 Brick w/ Studs on Side	Core SNOT anchor	DBG, Brown	Yes
Brackets (1×2–2×2)	Depth & layering	Black, White	Yes
Jumper Plates	Half-stud offsets	Neutral	Yes

6. 1×1 Headlight Brick: One of the most useful LEGO modified bricks in existence. It provides a stud on the side face, allowing tiles and plates to attach perpendicular to the wall. You can use it for narrow window reveals, column detailing, and any tight SNOT work where a larger bracket won’t fit. LBG and Tan are the most useful stock colours.

7. 1×2 Brick with Studs on Side (Erling Brick): Where the headlight brick handles tight spaces, the Erling brick handles larger SNOT surfaces. Two side studs let you tile over full wall sections horizontally, creating smooth facades without a stud in sight. These parts are essential for modern and contemporary modular designs.

8. 1×2–2×2 Bracket: The workhorse of facade layering. Brackets let you attach a 2×2 plate perpendicular to the build direction, building out depth on walls, creating window ledges, overhangs, and decorative courses. Black and white are the most universally useful colours; buy both in volume.

9. 1×2 Jumper Plate: Introduces a half-stud offset to any build. Use jumper plates for lane markings on road layouts, centring details on odd-width facades, and creating asymmetric geometry that breaks the rigid stud grid. Having a large supply in LBG and White opens up advanced building techniques that simply aren’t possible otherwise.

Decorative Parts That Work Across Any Modular Style

The structural layer makes a building functional but the decorative layer makes it believable. These parts define the visual character of facades, windows, and exteriors, and they earn their place across wildly different architectural styles.

Part Type	Why It’s Important	Best Colors	Bulk Recommended?
Masonry Bricks	Realistic texture	Tan, Dark Tan	Yes
Tiles (1×2, 1×4)	Smooth finishes	Match palette	Yes
Window Frames	Repeating structure	Black, White	Moderate
Arches	Architectural variation	Sand Green	Moderate

10. 1×2 Masonry Brick: The most popular LEGO building part for realistic exterior walls. The raised brick pattern on the face adds instant texture and depth without requiring SNOT techniques. In Tan and Dark Tan, masonry bricks create heritage storefronts, industrial facades, and residential brickwork that looks immediately convincing. These are great pieces to buy in bulk.

11. 1×2 Tile: Smooth, stud-free, and endlessly useful. Tiles in 1×2 form cover wall surfaces, sidewalk slabs, floor finishes, countertops, and interior surfaces. Match them to your build’s primary palette and buy deeply, you’ll always use more than you expect.

12. 1×4 Tile: The longer version of the 1×2, useful for covering wider surfaces cleanly. Window sills, tabletops, long floor runs, and rooftop decking all benefit from the 1×4 tile’s span. Same colour priority as the 1×2.

13. Window Frames: Repeated across every floor of every building, windows are the architectural element that defines a facade’s rhythm. Classic black and white frames work across period styles, contemporary designs, and industrial builds. Your most-used frame style should be well-stocked; secondary styles can be ordered per project.

14. Arch (1x3x2 or 1x5x4): Arches introduce curved geometry and architectural character that pure-brick buildings lack. Sand Green arches are a favourite for civic and heritage-style modular buildings. A moderate supply of two or three arch sizes dramatically expands the range of facades you can create without a single extra brick type.

Interior & Micro-Detail Parts That Add Realism

Interiors are where city builders tell their stories. A well-furnished room or shop interior turns a building from a shell into a place, and it’s often small, inexpensive parts that do the most work here.

Part Type	Why It’s Important	Best Use Case	Bulk Recommended?
1×1 Round Plates	Small detailing	Lights, knobs	Yes
Modified Plates	Micro builds	Furniture	Moderate
Minifigure Accessories	Realism	Interiors	Low
Printed Tiles	Storytelling	Shops/interiors	Low

15. 1×1 Round Plate: The most versatile micro-detail piece in the hobby. Use them as ceiling lights, button panels, shelf knobs, table settings, floor dots, and window trim. Stock White, Black, Tan, and a few accent colours heavily. They’re inexpensive and they do extraordinary work at 1:1 scale.

16. Modified Plate (with clip, rail, or offset stud): A broad category, but collectively essential. Modified plates with clips hold minifigure accessories as wall-mounted items; rail plates become shelves; offset-stud plates create furniture surfaces. A varied collection of modified plates is what separates a bare interior from a furnished one.

17. Minifigure Accessories: Mugs, books, food items, tools, and office supplies transform a generic interior into a specific place: a café, a library, a workshop, a kitchen. Buy selectively to match your build’s narrative, not in bulk.

18. Printed Tiles: A single printed tile on a computer screen, a newspaper, or a shop sign does more storytelling than a dozen plain tiles. Like minifigure accessories, these are low-volume but high-impact. A small, curated collection of printed tiles is far more useful than a random large assortment.

The 80/20 Rule: Parts You’ll Use in Every Build

The 80/20 principle holds up remarkably well in LEGO building: roughly 20 parts account for 80% of the pieces in most modular and city-scale MOCs. The 18 parts above represent that core. The final two round out the list:

19. 1×2 Plate: Deceptively simple and universally essential. The 1×2 plate fills gaps, creates fine elevation changes, reinforces wall sections, and contributes to the countless half-stud adjustments that make a build look deliberate rather than approximate. Stock every neutral tone in large quantities.

20. 2×2 Corner Tile: Corners are where many builds lose their polish. The 2×2 corner tile creates smooth, stud-free 90-degree transitions on floors, sidewalks, rooftops, and horizontal wall surfaces. DBG and LBG are the most useful colours for city applications; Tan and White for interiors.

Together, these 20 parts represent an investment in building range. Every one of them will be used across your next ten MOCs, regardless of style, scale, or subject matter. When you stock them deeply and consistently, the parts stop being a constraint and start being a resource.

Building a Personal “Core Inventory” of LEGO Parts

Having the right parts list is only half the equation. The other half is maintaining stock intelligently so you’re never mid-build and out of the piece that everything depends on.

Audit your current inventory first. Before buying anything new, note which of these 20 parts you already have in depth, which you have in small quantities, and which are missing entirely. Your first order should fill the gaps and deepen the thin spots, not add variety you don’t need yet.

Set minimum stock thresholds. Decide on a minimum quantity for your most-used pieces and treat dropping below it as a trigger to reorder. For a builder working on city-scale MOCs, that might be 200 units of 1×2 bricks in LBG, 100 brackets in White, 300 jumper plates in neutral. The exact numbers are less important than the habit of restocking before you run out.

Resist colour hoarding. It’s tempting to buy every colour of a useful part. Resist it. Focus on the five or six neutral tones that appear in 90% of builds and buy those deeply. Specialist colours can be ordered project-by-project. A broad but shallow inventory is less useful than a narrow but deep one.

Track what you reach for constantly. After every build, note which parts you wished you had more of. Those are your candidates for the next bulk order. Your personal 80/20 list will shift slightly based on your building style, let that data guide your purchasing rather than guesswork.

Buy for the next three builds, not the current one. The temptation in MOC building is to buy exactly what you need for the project in front of you. That approach costs more per piece and means you’ll be ordering again in weeks. If a part is on your essential list, buy enough to cover the next several builds at once.

Where to Buy Versatile LEGO Parts in Canada

Sourcing LEGO pieces in Canada has historically meant either high retail prices on individual sets, expensive international shipping from overseas platforms, or inconsistent quality on bulk orders. For MOC builders who need reliable quantities of specific parts — particularly the core structural and SNOT pieces that appear in every build — none of those options work well at scale.

Canada First Bricks was built for exactly this problem. As a Canadian-based kitting and fulfillment partner for the LEGO creator community, CFB specializes in accurate, professional sourcing and packaging for custom brick builds.

For builders stocking a core inventory, this means buying LEGO parts in Canada without sorting errors, missing pieces, or the delays that come with overseas sourcing.

Frequently Asked Questions

What are the most versatile LEGO parts for modular buildings?

The highest-utility parts for modular MOC building are 1×2 and 1×4 bricks in neutral tones, 1×2 masonry bricks, 1×2 tiles, brackets (1×2–2×2), jumper plates, headlight and Erling SNOT bricks, 1×1 round plates, and 32×32 baseplates. These 20 parts appear in the majority of modular and city builds regardless of style or scale.

What are SNOT bricks and why do advanced builders use them?

SNOT stands for “Studs Not On Top.” SNOT bricks — including headlight bricks, Erling bricks, and brackets — allow plates and tiles to be attached perpendicular to the standard build direction. This enables recessed window frames, smooth tiled wall surfaces, horizontal detailing, and the layered depth that distinguishes professional-quality MOC facades from basic stack-and-build constructions.

How much of each part should I buy for a modular MOC?

For a single modular building (32×32 footprint), expect to use 100–300 units of your primary brick in the main facade colour, 50–150 tiles for smooth surfaces, 20–50 brackets for depth work, and 30–80 jumper plates depending on the design’s complexity. For city-scale layouts with multiple buildings, multiply accordingly and always buy more than you think you need.

Where can I buy LEGO parts in bulk in Canada?

Canada First Bricks is a Canadian-based kitting and fulfillment partner specializing in LEGO-compatible parts for MOC creators, educators, and influencer brands. It’s the most reliable option for Canadian builders who need large quantities of specific parts without international shipping delays or sorting issues.

What are the best neutral colours to stock for modular building?

Light Bluish Gray (LBG), Dark Bluish Gray (DBG), Tan, Dark Tan, White, and Black cover the vast majority of modular building applications. These neutral tones work for facades, roads, sidewalks, interiors, and structural layers alike. Build deep stock in these six colours before expanding to specialty shades.

Are masonry bricks worth buying in bulk for MOC buildings?

Yes, masonry bricks are one of the highest-value purchases a modular builder can make. The 1×2 masonry brick in Tan and Dark Tan creates instant, convincing brickwork texture without requiring complex SNOT techniques. It’s one of the few decorative parts that genuinely belongs in bulk inventory rather than project-specific ordering.