Pre-Engineered Metal Building Extensions & Add-Ons
Whether you’re expanding operations, increasing storage, or upgrading functionality, Steel Craft Builders makes it easy to extend or enhance your existing metal building.
- Overview
Custom Expansion Solutions by Steel Craft Builders
One of the greatest advantages of owning a pre-engineered metal building (PEMB) is its ability to grow with your needs. Whether you’re expanding operations, increasing storage, or upgrading functionality, Steel Craft Builders makes it easy to extend or enhance your existing metal building.
From functional expansions like lean-tos and endwall extensions to aesthetic and practical upgrades like canopies or mezzanines, our team will guide you through every step of the design and installation process. We ensure your add-on blends seamlessly with your original structure
— structurally, visually, and functionally.
- TYPES
Types of Building Extensions & Add-Ons
Whether you need to increase square footage with an endwall extension or add functional covered space with a lean-to, we offer a wide range of structural add-ons designed to integrate seamlessly with your existing metal building.
Endwall Extensions
Endwall extensions increase your building’s length by adding additional bays or modules to one or both ends of the structure.
Steel Craft Tip: We engineer endwall extensions to match your original frame spacing and load requirements for a flawless connection.
- Best For
- Warehouses
- Manufacturing facilities
- Churches or gymnasiums
- Long-term phased growth plans
- Benefits
- Seamless addition with matching roofline and materials
- Preserves interior flow and layout
- Cost-effective long-term planning strategy
Sidewall Expansions
Sidewall expansions extend the width of your building, often by removing an existing wall and tying in new frames to expand the footprint.
Engineering Note: Sidewall extensions require careful evaluation of existing foundation and frame capacities — we handle the entire process.
- Best For
- Shops and garages
- Auto repair bays
- Commercial facilities needing more workspace
- Benefits
- Maximizes available lot space
- Maintains original building height and function
- Great for growing businesses with lateral space
Lean-To Structures
Lean-tos are single-slope extensions that attach to the side or end of your main building. These are typically used for covered storage, workshops, offices, or livestock shelters.
Steel Craft Advantage: We custom-size lean-tos to fit your function, whether it’s 10 feet wide or 50+.
- Best For
- Agricultural buildings
- Covered outdoor equipment areas
- Utility add-ons
- Loading dock shelters
- Benefits
- Fast and affordable expansion
- Open or enclosed options available
- Can match roof and wall finishes exactly
Canopies & Awnings
Canopies and awnings are overhang structures that provide shade, shelter, or architectural appeal at entryways, docks, or storefronts.
- Best For
- Retail stores
- Warehouses and delivery areas
- Office entryways
- Benefits
- Enhances curb appeal
- Provides weather protection
- Easy to attach without altering main frame
- Customization Options
- Flat or sloped
- Trimmed to match existing metal finishes
- Optional gutters and lighting
Interior Mezzanines
Mezzanines are elevated platforms installed inside your building, creating second-floor storage or workspace without expanding the exterior footprint.
Steel Craft Note: Mezzanines must be structurally engineered to handle your expected loads — we ensure full code compliance.
- Best For
- Warehouses and inventory rooms
- Office spaces
- Showrooms or breakrooms
- Benefits
- Doubles your usable square footage
- Great for equipment platforms or upper-level offices
- Custom-engineered for load and access
Framed Openings for Doors, Windows & Equipment
Need to add a new access point or equipment opening to your building?
- We Can Frame In
- Overhead doors
- Personnel doors
- Windows
- Exhaust fans or HVAC systems
- Loading dock ramps
- Benefits
- Allows adaptation for new equipment or business use
- Improves traffic flow or customer access
- Matches your building’s structural and aesthetic requirements
Roof Extensions & Overhangs
Roof extensions project beyond the edge of your building, creating additional shelter or architectural detail.
- Common Uses
- Equipment protection
- Extended overhang for covered work zones
- Rain and snow runoff control
- Benefits
- Simple structural add-on
- Increases covered square footage
- Improves drainage and shade
- Custom Solutions
Custom Solutions for Any Expansion
Whether you’re planning a simple lean-to or a full-scale addition, Steel Craft Builders brings unmatched experience in designing and erecting compatible, code-compliant PEMB extensions. We can even retrofit older steel buildings with modern add-ons, helping you breathe new life into your existing facility.
1. Seamless Structural Integration
We engineer precise structural tie-ins that connect the new framing system securely to your existing building, ensuring consistent load-bearing capacity and stability.
2. Aesthetic Continuity
We source specific panels, trims, and colors to match your current exterior, ensuring the extension blends perfectly with the original structure rather than looking like an afterthought.
3. Code Compliance & Permitting
Our team manages the engineering and design requirements to ensure your addition meets all local building codes, wind load ratings, and permitting standards.
4. Operational Continuity
We plan our installation phases strategically to keep your business running smoothly, minimizing downtime and interference with your daily workflow.
Need Help Choosing a Building Extension?
Submit the form and get an estimate started today.
- Industry Trusted
Let’s Build What’s Next
Your business grows — your building should grow with it. At Steel Craft Builders, we make it easy to expand with confidence. Whether you’re adding space, style, or functionality, we’ll help you create a seamless extension that looks and performs like it was always part of the plan.
Getting started is easy
Request your free estimate and connect with our team to start planning your project.