A Deck Above

NC

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Deck builder

200 sq ft Full structural system needed Ground-level decks stretch your budget further. Elevated decks deliver more features in a smaller footprint. For detailed estimating, see our complete guide to deck construction estimates . Iowa Structural Requirements by Deck Type Iowa building codes treat ground-level and elevated decks very differently. Requirement Ground-Level (under 30 in) Elevated (30+ in) Building permit May be exempt (varies by city) Required Frost-line footings (42 in) Required if attached to home Required Guardrail Not required Required (36 in min) Baluster spacing N/A 4 in max Stairs Rarely needed Usually required Critical Iowa note: Most national blogs claim ground-level decks do not need footings. In Iowa, that is only true for freestanding decks. Attached ground-level decks still need frost-line footings at 42 inches deep. Deck blocks warning: Deck blocks are designed for climates with 4 to 5 inches of frost penetration. Iowa’s frost line is 42 inches. In Des Moines metro clay soil, deck blocks can shift due to frost heave. For permanent installations, pour concrete footings to frost line depth. Permit variation: In Linn County , decks under 200 square feet and under 30 inches may be exempt if freestanding and not at the main exit. In Scott County, ALL decks require permits. Des Moines charges $75 . Always verify with your local building department. When to Choose Ground-Level Ground-level decks work best for flat lots, budget-conscious projects, and families prioritizing accessibility. Budget advantage: A 12×16 ground-level pressure-treated deck can come in under $6,000 installed. No railing saves $800 to $2,400+. No stairs saves $200 to $2,500+. Accessibility: Ground-level decks require no stairs, allowing wider pathways for wheelchairs, walkers, or families with small children. Ideal for aging in place. Build time: 5 to 7 days versus 2 to 4 weeks for elevated. Trade-offs: Less privacy, no usable space underneath, potential moisture issues. Maintain 18 inches clearance below joists. Illustrative scenario: A homeowner in Johnston on a flat lot builds a 14×20 (280 sq ft) ground-level pressure-treated deck at $27 per square foot. Total: $7,560 plus $75 permit = $7,635. No railing. No stairs. Build time: one week. Illustrative scenario based on Des Moines metro pricing data. When to Choose Elevated Elevated decks work best for sloped lots, walkout basements, and homeowners who want usable space underneath. Under-deck space: Creates covered storage, a screened porch, or shaded patio. Buyers perceive this as bonus area. Better views and privacy: Height provides sightlines over fences. Trade-offs: Railings required at 30+ inches, stairs, deep footings, always requires permits. Budget for footings ($800 to $3,200), railings ($800 to $2,400+), stairs ($200 to $2,500+). Illustrative scenario: A homeowner in Ankeny with a walkout basement builds a 12×16 (192 sq ft) elevated deck at $40 per square foot. Add $1,500 railings, $1,200 stairs, $1,800 footings, $75 permit. Total: $12,255. Build time: 2 to 3 weeks. Illustrative scenario based on Des Moines metro pricing data. Side-by-Side Comparison Factor Ground-Level Elevated Cost per sq ft $20 to $30 $30 to $100+ Railing cost $0 (not required) $800 to $2,400+ Footing cost Lower (or exempt if freestanding) $800 to $3,200 Build time 5 to 7 days 2 to 4 weeks Privacy Lower Higher Accessibility Better (no stairs) Requires stairs Under-deck space None Storage, patio, kitchen ROI 55 to 70% 70 to 80% (multi-level) For material options, see our guide to the best decking materials for Iowa homeowners . ROI and Home Value Deck Type Average ROI Resale Value Added Single-level wood 55 to 70% $8,559 average Single-level composite 55 to 68% $9,325 average Multi-level/elevated 70 to 80% Higher dollar value Wood deck (all types) Up to 82.9%* Per 2024 Cost vs. Value Report *The 2024 Cost vs. Value Report shows wood decks recoup up to 82.9% nationally. Single-level decks typically return 55 to 70%. Elevated decks cost more but return more at resale. The usable under-deck space adds perceived square footage that appraisers value. For design ideas, see our deck building guide with maintenance tips . Frequently Asked Questions How much does a ground-level deck cost in Des Moines? $20 to $30 per square foot installed for wood. A 12×16 deck runs $3,840 to $5,760. How much more does an elevated deck cost? 25 to 100% more due to footings ($800 to $3,200), railings ($800 to $2,400+), and stairs ($200 to $2...

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