9 Ways to Combine a Carport and Garage on One Property (2026)

You can combine a carport and garage on one property in nine main ways: an attached lean-to, a freestanding lean-to, a semi-attached lean-to, an open lean-to, a partially enclosed lean-to, a fully enclosed lean-to, a combo unit with a built-in storage room, a split-leg-height building, or a tall RV cover paired with a standard-height garage. The most affordable route is attaching a lean-to to a building you already own. The most flexible is ordering a combo unit or split-height building as one structure from the start.

Most people reach this question the same way. They bought a carport, used it for a season, and realised they needed something enclosed — for tools, for a project vehicle, for anything that shouldn’t sit in the weather. Or the garage is full and a second vehicle is living outside.

Buying two completely separate buildings works, but it’s rarely the best answer. Sharing a wall, a roofline, and a single installation costs less, looks deliberate rather than accumulated, and takes up less of your yard.

Here are the nine configurations Bulldog builds, what each one gives you, and when each makes sense.

1. Attach a Lean-To to a Building You Already Own

A lean-to is a single-slope structure attached to the main unit, available on the sides or the ends. Attached lean-tos gain additional stability and support from being fastened to the wall of the existing building, which is why they’re the least expensive way to add covered parking to a garage you already have.

Because the lean-to borrows one side of the current building for support, you’re only paying for one new slope of roof, its legs and its panels — not a second complete structure.

Best for: adding covered parking or storage to an existing enclosed building at the lowest cost.

Watch for: the attachment side needs adequate setback from your property line, and the roof pitch has to shed water away from the joint rather than into it.

See our lean-to metal buildings range.

2. Use a Freestanding Lean-To Instead

Freestanding lean-to structures are self-supporting and don’t require external bracing against another building. They’re also simpler to manufacture and can be relocated later.

This matters when your garage wall isn’t suitable for attachment — wrong orientation, a door or window in the way, or setback rules that prevent building right up to it. A freestanding lean-to sits near the garage rather than on it, and still reads as part of the same design if you match the roof style and colours.

Best for: sites where attaching isn’t practical, or where you may want to move the structure in future.

3. Consider a Semi-Attached Lean-To

Semi-attached lean-tos are fastened to the ground rather than braced against an outside structure. They’re most commonly seen in commercial settings such as retail forecourts and filling stations.

On a residential property, this suits a covered area that sits close to the garage without loading its wall — useful when the garage is older, or when you want the two structures structurally independent.

Best for: commercial sites, and residential layouts where the two structures should stay independent.

4. Leave the Lean-To Open

An open lean-to has no side walls — overhead cover only. It’s the cheapest configuration and the quickest to install.

Open lean-tos give you drive-in parking and protection from sun, rain and snow without the cost of panels, framing, or doors on the sides. If the main purpose is keeping weather off a vehicle you use daily, this is usually enough.

Best for: daily-use vehicles, equipment, and anywhere security isn’t the concern.

5. Partially Enclose the Lean-To

A partially enclosed lean-to closes some sides and leaves others open — commonly three sides closed with one long side left open for access.

You block wind, driven rain, and sun on three sides at meaningfully less cost than full enclosure with doors, and you keep the convenience of driving straight in. Face the open side away from your prevailing weather.

Best for: better weather protection than an open carport, without the cost of doors.

6. Fully Enclose the Lean-To

Fully enclosed lean-tos suit anyone needing a significant amount of interior space. Unlike standard lean-tos, which are open on one or more sides, a fully enclosed lean-to gives you privacy, security, and complete weather protection while still fitting neatly against the main building.

This is effectively adding a second garage bay for less than a second garage. Common uses are secure vehicle storage, a workshop, an office, or a home gym.

Best for: locked storage, workshops, and any space you’ll finish, wire or heat.

See our lean-to metal garages for enclosed configurations.

7. Order a Combo Unit With a Built-In Storage Room

Rather than joining two buildings, order one building where part of the footprint is enclosed, and part is left open. One frame, one roof, one foundation, one installation.

Because the enclosed and open sections share framing and a foundation footprint, a combo unit typically costs 15–25% less than buying a comparable carport and a comparable shed separately.

Best for: buyers starting from scratch who already know they need both.

8. Split the Leg Heights

One structure, two different leg heights — a taller section for a truck, RV or car lift, and a standard-height section for everyday parking.

Bulldog builds these as standard products. The 42×60 garage with lean-to runs 12-foot legs on the main structure and 9-foot legs on the lean-to; other builds pair 14-foot and 11-foot sections.

Standard heights run from 6 to 16 feet. Leg height is the most underestimated decision in a metal building — adding a foot or two costs comparatively little, and rebuilding to gain it later isn’t an option.

9. Pair a Tall RV Cover With a Standard-Height Garage

An RV cover needs far more clearance than a garage — typically 12 to 14 feet of leg height against a garage’s 8 to 10. Running the two side by side under a stepped roofline gives each section the height it actually needs, instead of paying for 14-foot walls across the whole footprint.

Best for: RV owners who also need enclosed storage for the gear that goes with it — generators, sewer equipment, awning hardware.

See our RV covers range.

Which Configuration Should You Choose?

What Roof Style Do You Need?

Roof style matters more on combined structures than on single ones, because you’re joining planes and shedding water at the junctions.

Two rules decide this for you in many cases: any building over 35 feet long must use a vertical roof style, and commercial-width structures are always vertical. Regular and boxed eave are available up to 30 feet wide; beyond that, vertical is the only option.

What Foundation Does a Combined Structure Need?

Bulldog recommends and requires a monolithic concrete slab for our structures. Requirements vary by state, but generic drawings typically call for:

• Structures 12–30 ft wide: footers 12 inches wide and 12 inches deep
• Structures wider than 30 ft: footers 24 inches wide and 24 inches deep

This matters more on a combined structure, not less. An enclosed section carries different loads than an open one, and the junction between them is where inadequate footing shows first. See our concrete requirements page, and our guide to anchor types for how the building ties down.

Frequently Asked Questions

Can you attach a carport to an existing garage?

Yes. A lean-to is a single-slope structure attached to the main unit, available on the sides or the ends, and it’s the standard way to add covered parking to a garage you already own. Attached lean-tos gain stability from being fastened to the existing building’s wall, which makes them the least expensive of the nine configurations. You’ll need adequate setback on the attachment side and a roof pitch that sheds water away from the joint.

What are the three types of metal lean-to?

Freestanding, attached, and semi-attached. Freestanding lean-tos are self-supporting, need no external bracing, and can be relocated. Attached lean-tos fasten to the wall of an existing building for additional stability and support. Semi-attached lean-tos fasten to the ground rather than bracing against another structure, and are most common in commercial settings such as retail forecourts.

Can a lean-to be attached to the end of a building, not just the side?

Yes. A lean-to can attach to either the sides or the ends of the main unit. Which works better depends on your site — where the driveway approaches from, where your setbacks fall, and which direction weather comes from.

Is it cheaper to buy a combo unit or a carport and garage separately?

A combo unit is typically 15–25% cheaper than buying a comparable carport and a comparable enclosed building separately. The saving comes from shared framing, one shared foundation footprint, a single delivery and one installation visit. Ongoing maintenance is simpler too, since you’re looking after one roof and one set of anchors rather than two.

Can a lean-to be fully enclosed?

Yes. Lean-tos can be open, partially enclosed or fully enclosed. A fully enclosed lean-to suits anyone needing significant interior space with privacy and full weather protection, and works well as secure vehicle storage, a workshop, an office or a home gym. An open lean-to gives overhead cover only and costs the least.

How tall do the legs need to be for a combined carport and garage?

Match the height to the tallest thing you’ll park. Cars and small SUVs need 8–9 feet, full-size pickups 9–10 feet, lifted trucks with roof racks 10–12 feet, a Class C RV 13–14 feet. Standard heights run 6 to 16 feet. If the two sections serve different vehicles, a split leg-height build gives each the clearance it needs without paying for maximum height across the whole footprint.

Can one building have two different leg heights?

Yes, and Bulldog builds these as standard products. The 42×60 garage with lean-to uses 12-foot legs on the main structure and 9-foot legs on the lean-to. This is the usual way to house a tall vehicle and a standard one under related rooflines without over-building either section.

What roof style should a combined structure use?

Vertical roof for anything over 35 feet long — that’s a requirement, not a preference — and for any area with meaningful snow, rain or hail. Regular and boxed eaves are available up to 30 feet wide and suit milder climates and house-matching looks. Combined structures create extra roof junctions, which makes vertical panels the safer choice in most cases.

Do I need a permit to combine a carport and a garage?

Usually yes. Most jurisdictions require a permit above a square-footage threshold, often around 200 square feet, and the enclosed portion frequently triggers requirements a bare carport would not. Rules vary by city, county, and HOA, so check with your local building department before ordering. Bulldog provides certified stamped engineering drawings to support your application.

Can I enclose the carport portion later?

Yes, though it costs more than ordering it enclosed from the start. Retrofitting means new framing connections, additional panels, colour matching against weathered steel, and sometimes foundation work beneath the newly enclosed area. If you think you’ll want the enclosure eventually, ordering it upfront is almost always cheaper and produces a better result.

Does a combined carport and garage need concrete under both sections?

Bulldog recommends and requires a monolithic concrete slab for our structures. The enclosed section in particular should always sit on concrete — it’s where you’ll walk daily, where anchoring matters most, and what most permitted structures require.

Can I get a combined carport and garage on rent-to-own?

Yes. Rent-to-own applies to combined structures the same as to standalone buildings — first month’s payment down, no credit check, instant approval, with delivery and installation included. You can pay the balance off early at any time with no penalty.

The Bottom Line

Combining a carport and garage comes down to two decisions: how much of the footprint you need enclosed, and whether the second structure attaches to the first, stands alone, or is ordered as one building from the start.

The layouts that go wrong are almost always the ones where a second structure was added years later without thinking about drainage, colour matching or setbacks. If there’s any chance you’ll want both eventually, specify both now — even if you only build one.

At Bulldog Steel Structures, we design and install Metal Carports, Metal Garages and combined structures in whatever configuration your site allows. Delivery and professional installation are included throughout most of the U.S., and financing and rent-to-own are available on every building.