Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Yes. The Colony requires a permit for any attached deck, regardless of size. Plan for 2–4 weeks of review, three inspections, and fees of $150–$400 based on valuation.
The Colony Building Department enforces both the 2015 International Building Code (which Texas adopted) and local amendments tied to North Texas soil and climate. What sets The Colony apart from neighboring cities: the city sits in Denton County on the Elm Fork of the Trinity River floodplain, which means your deck footings may trigger FEMA floodway certification if you're near the 100-year zone — a step most cities west or north in Denton don't require at this scale. Additionally, The Colony has adopted expansive-soil-specific footing rules because Houston Black clay (common in the area) swells with moisture; your footings must go 18 inches below grade and rest on undisturbed soil or concrete pads, per city amendments to IRC R403.1. The city also requires a licensed contractor for any attached deck (owner-builder exemption does NOT apply to decks), which differs from some Texas towns that allow owner-builder structural work. Finally, The Colony's online permit portal (through the city website) operates a 'resubmit loop' — if plan review flags missing ledger-flashing details or footing-depth callouts, you'll resubmit, which adds 5–7 days. Get this right the first time.

What happens if you skip the permit (and you needed one)

The Colony attached deck permits — the key details

The City of The Colony Building Department enforces the 2015 International Building Code with local amendments specific to North Central Texas soil and floodplain zones. Any deck attached to a house — meaning it shares a ledger with the home's rim joist — requires a permit. This includes decks under 200 square feet and under 30 inches high, which would be exempt in many states under IRC R105.2(1). The reason: The Colony amended its adoption of the IRC to require attachment details (ledger flashing per IRC R507.9) be reviewed by an engineer or architect whenever the deck is load-bearing, which is the case for virtually all attached decks. A freestanding deck (not touching the house) under 200 square feet and under 30 inches off grade does NOT require a permit in The Colony — but the moment you bolt it to the house rim joist, you've crossed the threshold. The city's Building Department reviews ledger-flashing specifications, footing depth, beam-to-post connections, guardrail height, and stair geometry on every submission.

Footing depth and soil bearing are where The Colony diverges sharply from neighboring cities. The city's soil is predominantly Houston Black clay and sandy alluvium, both expansive and prone to seasonal shrink-swell. The city amended IRC R403.1 (Foundation and Soils) to require deck footings minimum 18 inches below the lowest adjacent grade, bearing on either undisturbed native soil, caliche, or concrete pads. (For comparison, Dallas allows 12 inches in non-expansive areas; Plano often waives engineered footing reports for decks under 400 sq ft.) The Colony's plan-review checklist requires footing-depth callouts on every foundation detail. If your soil report or site plan is vague ('footings per IRC'), plan review will reject it. Many builders miss this: you may need a soil engineer ($300–$600) to certify native soil or caliche depth on your property. Frost heave is secondary here (frost line is 12 inches in The Colony, well below the 18-inch requirement), but expansive clay movement is the real driver. The city's historical code cases show several deck ledgers that failed due to settlement — footings were placed in fill soil, not undisturbed earth. Get a soil engineer or at least a detailed geotechnical note from the excavator certifying what's below 18 inches.

Ledger-flashing compliance is the single most common rejection in The Colony plan review. IRC R507.9 requires through-bolts (or lag bolts) spaced 16 inches on center, metal flashing behind the ledger, and a gap between the ledger and rim joist (to allow water drainage). Your plans must show a cross-section detail — not just a general note. The city's Building Department has posted an explicit FAQ on this: 'Ledger flashing must be 26-gauge galvanized steel or equivalent, bent to cover the rim board top and extend down to the house wrap, with a minimum 2-inch lap onto the deck rim.' Many contractors assume they can flash with rubberized tape; The Colony will reject that. Your plan reviewer will also flag the bolt pattern and spacing. If your deck is longer than 12 feet, you'll likely need an engineer-stamped plan showing lateral-load capacity — even for a small residential deck — because The Colony requires DTT (deck tie-down) devices per IRC R507.9.2 to resist wind uplift in North Texas wind zones. A stamped plan typically costs $400–$800 and is mandatory if the city issues a 'design for wind' flag.

Guard rails, stairs, and ramp standards are non-negotiable. IRC R1015.2 requires guards 36 inches high (measured from the deck surface) with a 4-inch sphere rule (no ball larger than 4 inches can pass between balusters). The Colony's Building Department enforces this without exception. If your deck is 30 inches or higher off grade, guardrails are required on all open sides. Stairs must comply with IRC R311.7: rise 7–11 inches (uniform within 3/8 inch), run 10–11 inches, handrails 34–38 inches high, and a landing depth of 36 inches at both top and bottom. Many homeowners build stairs that don't meet code and are surprised when the city inspector red-tags them during framing review. The city's three-inspection sequence (footing pre-pour, framing, final) means your stair stringer is reviewed before concrete is poured — so get the math right. If you're adding a ramp (ADA-style or just a shallow slope), it must be 1:12 slope maximum (1 inch rise per 12 inches run), with handrails if it exceeds 6 inches of rise. Ramps are reviewed the same way as stairs.

The permit timeline in The Colony is typically 10 business days for initial plan review, 5–10 days for resubmit loops (if needed), then 2–4 weeks from approval to scheduling inspections. The city does NOT allow over-the-counter single-family deck permits — all submissions go to the full review queue. Your contractor or you must submit plans through the city's online portal (the city website has a link to the permit system) or in person at City Hall. Fees are assessed at $7.50 per $1,000 of construction valuation, with a minimum fee of $150. A typical 16x12 deck with stairs runs $8,000–$12,000 in construction cost, yielding a permit fee of $60–$90 (minimum held at $150). Inspection fees are included. Once approved, you'll receive three inspection notices: footing pre-pour (concrete must not be poured until approved), framing (after ledger is bolted, posts set, beams in place, joists and rim installed), and final (decking, stairs, guards, handrails installed and finished). Plan for 1–2 weeks between each inspection, depending on your contractor's schedule and the inspector's availability. Many homeowners underestimate the timeline; budget 8–12 weeks from permit pull to certificate of occupancy.

Three The Colony deck (attached to house) scenarios

Scenario A
16x12 attached deck, 3 feet high, rear yard, off master bedroom — typical North Colony subdivision (Ridgemont, The Tribute)
You're building a composite-decking platform 16 feet wide by 12 feet deep, 36 inches above grade, with a ledger bolted to the house rim joist and four corner posts on concrete footings. This is the bread-and-butter deck for The Colony. The permit is mandatory. Your plan submission must include: site plan showing lot lines and deck location (to verify no encroachment into setbacks or flood zones), foundation detail with footing depth (minimum 18 inches below grade, bearing on undisturbed soil), ledger flashing detail (cross-section showing bolts every 16 inches, metal flashing, water gap), post-to-beam connection detail, and joist layout. Your contractor (must be licensed; owner-builder exemption does NOT apply) will submit these to the city's online portal. Plan review typically flags ledger flashing first — if the detail is vague, resubmit with the exact flashing profile from Simpson Strong-Tie or an engineer. Footing depth is the second common flag; if your property is on fill, you'll need a soil engineer's letter. Once approved (10–14 days), the inspector schedules footing pre-pour within 48 hours of notification. Concrete footings are inspected for depth, hole diameter (minimum 12 inches), and undisturbed native soil confirmation. Framing inspection follows once ledger is bolted (check bolt spacing: 16 inches on center), posts are set, beams are in place, and joists are installed (on 16-inch centers). Final inspection checks decking fastening (screws or ring-shank nails, 6 inches on center), guardrail height (36 inches minimum), handrail diameter (1.25–2 inches), and any stair compliance. Budget $8,000–$12,000 total: $150 permit fee, $2,000–$3,000 engineering/plan prep (if needed), $5,000–$8,000 labor and materials, 10–12 weeks timeline.
Permit required | Licensed contractor mandatory | Soil engineer often needed ($300–$600) | Stamped plans optional unless flagged | Footing min 18 inches | Ledger flashing IRC R507.9 mandatory | Three inspections (footing, framing, final) | Permit fee $150 | Total project $8,000–$12,000
Scenario B
12x10 treated-pine deck, 18 inches high, corner lot in The Colony near floodplain boundary (Westridge area) — may trigger floodway review
You're in Westridge, a neighborhood that borders the Elm Fork floodplain. Your deck is smaller (120 sq ft, 18 inches high), which in many Texas cities would be near-exempt. Not here. The Colony requires a permit AND triggers additional review if your lot is within the 100-year floodway. First, the standard deck permit applies: ledger flashing, footing depth, guard rails, same as Scenario A. But second, the city's floodplain coordinator must certify that deck posts and footings do not obstruct flood flow. This adds 3–5 business days to the review. Your plan submission must include: elevation certificate (FEMA form, $300–$500 from a surveyor), showing existing grade and finished deck height relative to the 100-year flood elevation. If your deck is below the flood elevation, it may require fill material to be removed after flooding (impossible in practice) or the city will require breakaway walls or adjustable posts — slowing approval. If your deck is above flood elevation, you're clear, but you must document it. Many contractors forget this step entirely; the city will not issue a permit without the elevation certificate if floodplain is involved. Once approved (15–21 days due to floodplain lag), inspections are standard but the inspector will verify deck height against the certified elevation. Materials: treated pine is acceptable (UC3A or UC4 rating for ground contact). Hardware must be galvanized (hot-dipped, not electroplated). Budget $1,000 extra for the elevation certificate and floodplain coordination; total project $9,000–$13,000, timeline 12–16 weeks due to floodplain review.
Permit required | Floodplain coordination required | Elevation certificate mandatory ($300–$500) | Licensed contractor | Footing min 18 inches | Ledger flashing detail required | Breakaway walls possible if below flood elevation | Three inspections plus floodplain pre-approval | Permit fee $150 | Total project $9,000–$13,000
Scenario C
20x16 elevated deck with built-in planter boxes and under-deck lighting, no stairs initially — mixed-use consideration, north Colony (Lakeside Village, higher income area with HOA)
You want a larger deck (320 sq ft, 4 feet high) with integrated planters and low-voltage LED lights underneath for ambiance. This triggers THREE separate permit workstreams in The Colony, not just the standard deck permit. First, the structural deck permit (same as Scenario A/B: ledger, footings, framing). Second, electrical: any outdoor lighting, even low-voltage, requires an electrical permit and inspection per NEC 690.12 (outdoor installations). Your under-deck lights must be on a GFCI-protected circuit; the city will require an electrician to pull the electrical permit separately ($75–$150 fee), and a rough-in inspection before decking is installed, then a final after lights are wired. Third, built-in planters may trigger a zoning review if they're considered 'living structures' that affect setback compliance — The Colony's zoning code has a 10-foot rear-yard setback, and planters along the deck edge can be interpreted as extending the footprint. Call the zoning department before you design. Fourth, if your HOA has CC&Rs (deed restrictions), HOA approval is SEPARATE from the city permit and often takes 2–4 weeks. The Colony has many HOA communities; many require architectural review. Your city permit will NOT be held up by HOA, but you cannot legally build without HOA approval, so manage both timelines in parallel. The structural permit follows the standard path: plans, footing pre-pour, framing, final. The electrical permit runs in parallel: rough-in inspection after framing but before decking. Materials: treated lumber (UC4 for posts/beams, UC3A for joists), composite or pressure-treated decking, planter boxes can be wood (PT) or composite, lighting must be rated for wet locations (IP65 minimum). The under-deck drainage system is not required by code but is a best practice in North Texas rain. Budget $15,000–$22,000 total: $150 structural permit + $75 electrical permit, $1,000–$1,500 for stamped plans, $12,000–$18,000 labor/materials, $0–$400 HOA approval (fee varies). Timeline: 14–18 weeks (HOA lag + dual permit reviews + dual inspection schedules).
Permit required (structural + electrical) | Licensed contractor for deck | Licensed electrician for lighting | HOA approval separate, parallel track (2–4 weeks) | Footing min 18 inches | Ledger flashing detail + planter setback verification | Electrical rough-in inspection required | GFCI protection mandatory | Zoning review possible for planter footprint | Structural permit $150, electrical $75–$150 | Total project $15,000–$22,000

Every project is different.

Get your exact answer →
Takes 60 seconds · Personalized to your address

Expansive soil, footing depth, and The Colony's 18-inch rule

The Colony sits on soil that is problematic for shallow foundations. Houston Black clay, which dominates the area, has a Potential Vertical Rise (PVR) of 3–6 inches — meaning it swells significantly when wet and shrinks when dry. This is not frost heave (which is a freeze-thaw cycle); it's expansive clay movement, which occurs year-round in North Texas, especially during wet springs and dry summers. The city amended IRC R403.1 to require deck footings 18 inches below grade, bearing on undisturbed native soil or approved fill (concrete pads). This depth is intended to reach below the zone of seasonal moisture fluctuation. For comparison, Dallas allows 12 inches in non-expansive areas; Frisco often allows 15 inches with engineer approval. The Colony does not allow variance on the 18-inch depth without a soil engineer's written certification that deeper footings are not needed.

The practical implication: your excavator or contractor must expose undisturbed soil at 18 inches and certify that native soil or caliche is present (not fill). If your property has been regraded or filled in the past, you'll need a geotechnical engineer ($300–$600) to write a letter stating that either (a) the fill is suitable and stable, or (b) caliche or native soil is available at or below 18 inches. This step is skipped by many DIY-minded homeowners, and the city's inspector will red-tag the footing if undisturbed soil is not evident. Do not assume your contractor knows this; call the city's Building Department or ask the plan reviewer during the resubmit loop.

Concrete pads (frost-protection blankets) are an alternative: a 4-inch-thick concrete pad can be poured at grade and the post set on top, with the pad footing extending 18 inches below grade. This is common in newer The Colony subdivisions where the topography has been altered. The city accepts this, but the pad footing detail must be shown on plans. If you choose this route, the pad is poured and inspected as part of the footing pre-pour inspection.

Ledger-flashing details, water damage, and The Colony's explicit FDA requirement

The City of The Colony's Building Department has published an explicit FAQ section on its website (accessible through the city's permit portal page) that states: 'Ledger flashing must be 26-gauge galvanized steel or equivalent, bent to cover the rim board top and extend down to the house wrap or sheathing, with a minimum 2-inch lap onto the deck rim.' This is not ambiguous language. IRC R507.9 provides the code baseline, but The Colony's FAQ operationalizes it. Many contractors bring plans that show a generic note ('flashing per IRC R507.9') without a cross-section detail. The city will reject this every time. Your plan must include a 1/2-inch scale or larger cross-section showing the bolt pattern (16-inch on center), the flashing profile (bent angle, depth, lap), and the water gap between ledger and rim (minimum 1/2 inch).

Why this matters: improper ledger flashing is the leading cause of deck ledger failure and subsequent house damage in North Texas. Water penetrates behind the flashing, rots the rim joist and band board, and can compromise the structural integrity of the entire house. The city has seen multiple litigation cases where this went wrong. One notable case in The Colony: a 2016 deck collapse injured two people; investigation showed improper flashing that allowed water into the rim joist for three years. The city now requires engineer-stamped plans if the ledger detail is complex or if the rim joist is not easily accessible for inspection.

Practical step: use a recognized flashing profile, such as Simpson Strong-Tie's L70 ledger flashing or equivalent. Bring the product data sheet to your plan preparer or engineer. Have them draw the exact profile, bolt spacing, and fastener type on the plan. The city's plan reviewer will recognize it and is unlikely to flag it. If you use rubberized tape, self-adhesive flashing, or generic sealant, the city will require you to revise to metal flashing. Lead time is typically 5–7 days for a resubmit.

City of The Colony Building Department
6800 Main Street, The Colony, TX 75056
Phone: (972) 625-1510 (Building Department main line; confirm locally) | https://www.thecolonytx.gov/government/departments/community-development/building-permits
Monday–Friday, 8:00 AM–5:00 PM Central Time

Common questions

Do I need a permit for a freestanding ground-level deck?

Yes, if it's attached to your house (shares a ledger with the rim joist). If it's truly freestanding (not touching the house) AND under 200 square feet AND under 30 inches high, you do NOT need a permit in The Colony. However, the moment you bolt it to the house, it becomes an attached deck and requires a permit, regardless of size or height. 'Attached' means load-bearing connection to the home's structure.

Can I build my own deck without hiring a contractor?

The owner-builder exemption (allowed in Texas for owner-occupied residential work) does NOT apply to decks in The Colony. The city requires a licensed contractor to build any attached deck. Owner-builder exemption is limited to certain interior work (walls, doors, flooring); structural outdoor work like decks is excluded. You must hire a licensed contractor and include their license number on the permit application.

How deep do footings need to be?

Minimum 18 inches below the lowest adjacent grade, bearing on undisturbed native soil or caliche (per The Colony's amendment to IRC R403.1). If your soil is not certifiably undisturbed or your property is in fill, you may need a soil engineer to approve the depth or recommend concrete pads. Frost depth (12 inches in The Colony) is irrelevant; the 18-inch rule is driven by expansive clay swelling and shrinkage.

What happens during plan review if my ledger flashing detail is missing?

The city will issue a correction notice (via email or portal) requiring you to submit a revised plan with a cross-section detail of the ledger flashing, bolt spacing, and water gap. You have 10 business days to resubmit. This typically costs $100–$300 to revise plans with an engineer or architect. Plan on 5–7 additional days for re-review. Many contractors avoid this by including a detailed flashing cross-section in their initial submission.

Do I need a stamped (engineer-signed) plan?

Not required for all decks, but often necessary if The Colony's plan reviewer flags design complexity, wind resistance, unusual soil conditions, or floodplain involvement. A stamped plan costs $400–$800 and is issued by a Professional Engineer (PE) licensed in Texas. If you skip it and the city flags wind or soil concerns, you'll be required to get one anyway, so budgeting for it upfront can save time.

What if my deck is in the 100-year floodplain?

You must obtain an elevation certificate (FEMA form, typically $300–$500 from a surveyor) showing the finished deck elevation relative to the 100-year flood elevation. If your deck is below the flood elevation, the city may require breakaway walls or adjustable posts. If it's above, you're clear but must document it. The floodplain review adds 5–7 days to permit processing. Many lots in The Colony near the Elm Fork have floodplain restrictions; check the city's flood-zone map or call the zoning department.

How much does the permit cost?

The city charges $7.50 per $1,000 of construction valuation, with a $150 minimum fee. A typical 16x12 deck with stairs ($8,000–$12,000 construction cost) incurs a permit fee of $60–$90 (held at the $150 minimum). Inspection fees are included in the permit fee. Electrical permits (if you add lighting) are separate, typically $75–$150.

How many inspections does my deck need?

Three: footing pre-pour (concrete must not be poured until approved; inspector verifies hole depth, diameter, and undisturbed soil), framing (after ledger is bolted, posts are set, beams are in place, and joists are installed), and final (after decking, stairs, guardrails, and handrails are installed). Each inspection must be requested by your contractor via the city portal or phone. Plan for 1–2 weeks between inspections depending on your contractor's schedule and inspector availability.

What guard-rail height does The Colony require?

Guardrails must be 36 inches high (measured from the deck surface to the top of the rail) per IRC R1015.2. The 4-inch sphere rule applies: no opening between balusters should allow a 4-inch ball to pass through. If your deck is 30 inches or higher off grade, guardrails are required on all open sides. This is non-negotiable; the inspector will measure during final inspection and will not sign off if guardrails are undersized.

Can I add stairs later, or do I need them in my permit?

You can include stairs in your initial permit or add them in a future amendment. If you plan stairs, include them in the original submission (easier approval). If you build the deck without stairs and add them later, you'll need a separate permit amendment. Stair compliance (rise 7–11 inches, run 10–11 inches, handrails 34–38 inches, landing depth 36 inches) is reviewed as part of the framing inspection. Mistakes here are common; have a contractor who knows code or get an engineer to review stair geometry before framing.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current deck (attached to house) permit requirements with the City of The Colony Building Department before starting your project.

Keep researching

Deck (Attached to House) permits in other Texas cities
Other permits in The Colony
Deck (Attached to House) permits in popular cities
Browse all

More permit guides

National guides for the most-asked homeowner permit projects. Each goes deep on code thresholds, common rejections, fees, and timeline.

Roof Replacement

Layer count, deck inspection, ice dam protection, hurricane straps.

Deck

Attached vs freestanding, footings, frost depth, ledger, height/area thresholds.

Kitchen Remodel

Plumbing, electrical, gas line, ventilation, structural changes.

Solar Panels

Structural review, electrical interconnection, fire setbacks, AHJ approval.

Fence

Height/material limits, sight triangles, pool barriers, setbacks.

HVAC

Equipment changeouts, ductwork, combustion air, ventilation, IMC sections.

Bathroom Remodel

Plumbing rough-in, ventilation, electrical (GFCI/AFCI), waterproofing.

Electrical Work

Subpermits, NEC sections, panel upgrades, GFCI/AFCI, who can pull.

Basement Finishing

Egress, ceiling height, electrical, moisture barriers, occupancy rules.

Room Addition

Foundation, footings, framing, electrical/plumbing extensions, structural.

Accessory Dwelling Units (ADU)

When permits are required, code thresholds, JADU vs ADU, electrical/plumbing/parking rules.

New Windows

Egress, header sizing, structural cuts, fire-rating, energy code.

Heat Pump

Electrical capacity, refrigerant handling, condensate, IECC compliance.

Hurricane Retrofit

Roof straps, garage door bracing, opening protection, FL OIR product approval.

Pool

Barriers, alarms, electrical bonding, plumbing, separation distances.

Fireplace & Wood Stove

Hearth, clearances, chimney, gas line work, NFPA 211.

Sump Pump

Discharge location, electrical, backup options, plumbing tie-in.

Mini-Split

Refrigerant lines, condensate, electrical disconnect, line set sleeve.