20×20 Metal Building Cost in Montgomery County, Texas
Estimated range based on 2026 market data and Montgomery County design requirements. Final pricing requires a dealer quote.
Prefer a kit you install yourself? A 20×20 kit-only package in Montgomery County runs about $4,500 – $7,800 (steel only, no erection or slab). The installed range above includes delivery and erection.
We price 20×20 metal buildings for Conroe, The Woodlands, Willis, Montgomery and across Montgomery County.
What the 20×20 estimate includes — and what it doesn't
Most price pages won't tell you this. The slab alone can add a third again on top of the building, so here's the honest breakdown.
Included in the installed range
- The building — frame, roof and wall panels, trim, fasteners
- Engineering for Montgomery County's loads — 120 mph design wind, 5 psf snow
- Stamped drawings for your permit application
- Delivery to your prepared site
- Professional erection on a level, ready pad
- Anchors for the slab or ground type specified
Not included — budget separately
| Item | Typical cost |
|---|---|
| Concrete slab Texas-typical for 20×20 — about $5.00–$9.00/sq ft. Depends on soils report and local ready-mix. | $2,000 – $3,600 |
| 10×10 roll-up door Each | $1,200 |
| 12×12 roll-up door Each | $1,600 |
| 3'×7' walk-in door Each | $450 |
| 3'×3' window Each | $350 |
| Insulation Double-bubble through R-17 double-layer, quoted per sq ft of covered area (roof + walls), not footprint. | $1.50–$3.00/sq ft |
| Permit fees Set by Montgomery County Environmental Health — Permitting Dept. Fees differ inside city limits, in the ETJ, and unincorporated — confirm directly. | Varies |
Site prep — clearing, grading, and getting a truck to the pad — is the other variable we can't price for you. A level, accessible site is what keeps an install to a single day; a sloped or tight one is where surprise costs come from.
Price estimator
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Adjust size, county, height and doors for a live range. Same math as the price band above.
What drives the price in Montgomery County
A 20×20 building (400 sq ft) is in the garage-and-workshop range — big enough for vehicles, a home shop, hobby space, or storage, small enough to go up fast on a simple slab. It's the most common size for residential buyers. In Montgomery County, the design loads above — not just the size — decide where in the range your price lands.
At 120 mph design wind speed, Montgomery County sits one tier above the inland baseline. Engineers respond with heavier gauge or tighter purlin and girt spacing rather than a redesign, so the wind premium is modest. Expect the building to require stamped drawings that reflect the 120 mph load if you're pulling a permit near Conroe.
Foundation & slab in Montgomery County
Steel is only half the job — the concrete under it is the other half. The Houston metro sits on expansive Beaumont and Lissie clays that swell and shrink with moisture. A properly designed slab — often post-tensioned or with a stiffened edge and moisture control — is what keeps a metal building square over time. Don't cut the foundation to save money here. The slab range shown in the estimator is a Texas-typical figure; your final number depends on a soils report and the local ready-mix price.
Montgomery County has a light ground snow load of 5 psf, which the standard roof package already handles. It does not add to the price here.
Montgomery County is Seismic Design Category B. Like nearly all of Texas, seismic loads do not govern a metal building's design here — wind is the controlling force, not earthquakes — so seismic adds nothing to the price band.
Permits in Montgomery County
For a metal building in Montgomery County, permitting typically runs through the Montgomery County Environmental Health — Permitting Dept (936-539-7836). Requirements vary by whether you're inside a city limit, in the ETJ, or unincorporated, and most departments want the supplier's engineered, stamped drawings before they'll issue. Confirm current fees and setbacks with the office directly — we verify these links but rules change.
Frequently asked questions
- How much does a 20×20 metal building cost in Montgomery County, TX?
- A 20×20 metal building in Montgomery County typically runs $6,200 – $11,300 installed and delivered. That range reflects Montgomery County's 120 mph design wind speed and current Texas market pricing. Final pricing requires a dealer quote.
- Why does the price change by county?
- Steel is engineered to local building loads. A county's design wind speed, snow load, seismic category, and — on the coast — TDI windstorm certification all change how much steel and engineering the building needs. That's why Montgomery County has its own price band instead of one statewide number.
- Do I need a permit for a metal building in Montgomery County?
- Usually yes. Permitting typically runs through the Montgomery County Environmental Health — Permitting Dept, and most departments require the supplier's engineered, stamped drawings. Requirements differ inside city limits versus unincorporated areas — confirm with the office before ordering.