Garage and shed slabs in Boulder
A slab for a garage, shop or shed needs to be level, well-drained and thick enough for what will sit on it. The base underneath matters as much as the concrete itself.
A free referral service, not a contractor. One local concrete contractor quotes and does the work.
Get a free quote
Takes a minute. One local concrete contractor calls you back. No obligation.
Free, no obligationYou never pay us anything.
One contractorNot a flood of sales calls.
Local to BoulderLouisville, Lafayette, Superior and nearby.
Details never soldShared with one contractor only.
What goes into the quote
- Size and thickness
- Base preparation and compaction
- Reinforcement and any thickened edges
- Whether it needs to meet building permit requirements
How long: Usually 1–3 days of work, then about a week of curing before heavy loads.
Rough ranges for guidance, not quotes. Your contractor's quote is what counts.
Get a real quoteGood to know in Boulder
Boulder sees strong chinook winds, spring hail and quick swings between warm days and freezing nights.
Freeze-thaw cycles and spring hail are the main enemies of concrete in Boulder. Air-entrained concrete, good drainage and a sealer help it last.
Anything in the public right-of-way, like a driveway approach or the sidewalk, needs City of Boulder approval. A good contractor will handle the permit.
Common questions
Do I need a permit for a slab?
A slab for a detached garage or a larger shed often does. A small shed pad often doesn't. Check with your city or county building department.
How thick should a garage slab be?
Four inches is common, with thicker edges or more under heavy equipment.
How long before I can drive on a new driveway?
Usually about a week for a car, longer for anything heavy. Your contractor will tell you for your mix and the weather.
Ready for a quote?
Tell us about the job and one local concrete contractor will call you back. Free, and no obligation.
Get my free quote