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20×30 Vs. 20×40 Vs. 24×30: Metal Building Cost Breakdown by Size

Views: 0     Author: Site Editor     Publish Time: 2025-07-08      Origin: Site

When planning a metal building project, one of the first questions people ask is: Which size should I choose, and how much will it cost? Whether you're building a workshop, garage, storage unit, or small warehouse, understanding the cost differences between popular sizes like 20×30, 20×40, and 24×30 can help you make a smart decision for your budget and space needs.


In this article, we'll break down the estimated prices, use cases, and key factors that affect the cost of each size metal building in 2025.

metal building project



Why Building Size Matters


The size of a metal building directly affects not just the materials required but also:


  • Foundation requirements

  • Framing and roofing complexity

  • Transportation and installation

  • Internal layout and usage efficiency


Even small differences in width or length can significantly impact total cost and functionality.



20×30 Metal Building Prices in 2025


Total area: 600 square feet


Estimated cost: $8,000 – $15,000 (basic structure only)


Best for:

  • Single-car garage

  • Small storage unit

  • Tool or equipment shed

  • Compact workshop


Cost Influencing Factors:

  • Choice of steel grade and wall thickness

  • Number of doors/windows

  • Optional insulation or finishing

  • Local construction regulations and snow/wind load requirements



24×30 Metal Garage Cost


Total area: 720 square feet


Estimated cost: $10,000 – $18,000


Best for:

  • Two-car garage with workspace

  • Medium-size personal workshop

  • Farm equipment storage


Why choose 24×30 over 20×30:

  • 20% more usable floor space

  • Greater flexibility in interior layout

  • Suitable for wider garage doors or side entry


Though the cost is slightly higher than a 20×30, the added space per dollar often makes this size more cost-efficient in the long run.



20×40 Steel Building Cost


Total area: 800 square feet

Estimated cost: $11,000 – $20,000


Best for:

  • Commercial storage

  • Home-business workshops

  • Long equipment garages


This layout is ideal for narrow land plots or side-by-side parking. Its rectangular shape also makes it easier to divide into zones (e.g., parking + workshop or office + storage).



Quick Cost Comparison Table


Size Area (sq ft) Estimated Cost (USD) Best Use Case
20×30 600 $8,000 – $15,000 Small garage, tool shed
24×30 720 $10,000 – $18,000 Two-car garage, workshop
20×40 800 $11,000 – $20,000 Long garage, small warehouse



Which Size Is Right for You?


Choosing the right metal building size depends on:


  • Your primary use (vehicle storage, tools, business use, etc.)

  • Space availability on your property

  • Budget limitations

  • Future expansion plans


If you want basic functionality and a lower initial investment, the 20×30 may be sufficient. However, for those who need more space and versatility, the 24×30 and 20×40 sizes offer better value per square foot.



Tips to Save on Metal Building Costs


  1. Buy direct from factory: Avoid middlemen and save on markup.

  2. Choose standard sizes: Customization increases cost.

  3. Simplify design: Fewer windows, doors, or interior walls = lower price.

  4. Build in bulk: Combine with other units to reduce per-building costs.

metal building project (3)



Get Your Free Quote from LIYOU Steel Structure


At LIYOU Steel Structure, we manufacture and export prefabricated steel buildings in all sizes — including 20×30, 24×30, and 20×40 — for garages, warehouses, shops, and more.


We offer:

  • Factory-direct pricing

  • OEM/ODM customization

  • Global shipping and support

  • Professional structural design



Feel free to email us your building size and project requirements — we'll get back to you with a detailed quote within 24 hours. 


Email: liyousteelstructure@outlook.com