Decks and fences are among the most common outdoor construction projects, and they are also among the most frequently botched. The reasons are predictable: structural requirements are often underestimated, permits are skipped, material quality is misrepresented, and post-installation problems surface years later. Hiring a contractor who understands both the construction and the regulatory requirements is the difference between a lasting structure and a recurring maintenance problem.
This guide covers the specific considerations for hiring deck and fence builders — what to know about materials, permits, structural requirements, and contract terms before any work begins.
Decks and Fences Are Regulated Differently
In most jurisdictions, decks attached to a house require a building permit and inspections. The structural connection between the deck ledger and the house rim joist is a critical load-bearing connection that must meet specific code requirements — improperly installed ledger connections are one of the leading causes of deck collapses. Detached decks and platform decks (low, freestanding) may or may not require permits depending on height and square footage.
Fences typically require permits for structures above a certain height (often 6 feet) and may be subject to HOA restrictions, setback requirements, and sight-line regulations near driveways and intersections. A contractor who says "most people just skip the permit" is exposing the property owner to fines, removal orders, and problems at resale.
Ask any prospective contractor to identify specifically which permits are required for the project and to confirm who is responsible for pulling them. The contractor should pull the permit in their name — not the homeowner — for projects where they are the builder of record.
Material Choices and What They Mean
Deck Materials
Pressure-treated lumber is the standard for deck framing and is required in most jurisdictions for ground-contact and near-ground applications. The decking surface (the boards people walk on) can be pressure-treated, composite, cedar, redwood, or tropical hardwood. Each has different maintenance requirements, longevity, and cost.
- Pressure-treated pine: Lowest cost, requires staining every 2–3 years, prone to checking and warping as it dries
- Cedar or redwood: Naturally rot-resistant, better appearance, moderate cost, still requires periodic sealing
- Composite decking: Highest upfront cost, lowest maintenance, does not rot or splinter, must be installed on correct joist spacing per manufacturer specs
- Tropical hardwood (ipe, teak): Extremely durable and dense, premium cost, requires specialized fasteners, difficult to work with
Specify the exact decking product — brand, product line, and color — in the contract. "Composite decking" with no further specification allows substitution with any composite product, including entry-level options that perform very differently from premium brands.
Fence Materials
Wood fences (cedar, redwood, pressure-treated pine) are the most common and the most variable in quality. The critical factors are post quality (size, treatment level, installation depth) and hardware (galvanized or stainless to prevent rust staining). A cedar-board fence with undersized, improperly set posts will lean within three to five years in most soils.
Vinyl fencing requires no painting and resists rot, but quality varies widely between manufacturers. Metal fencing (aluminum, steel, wrought iron) is extremely durable but expensive. Chain link is the most economical option and the most utilitarian.
Structural and Installation Requirements
Deck Post and Footing Requirements
Deck posts must be set on footings that extend below the frost line — which varies by climate from 12 inches in warm regions to 48 or more inches in northern states. Footings must be sized to distribute the load of the deck and its occupants. A contractor who sets posts in shallow, undersized footings is creating a structure that will heave, settle, and fail prematurely.
Ask the contractor to specify footing depth and diameter in the contract. Ask whether they will be pulling a permit and scheduling an inspection before concrete is poured. An inspection at this stage catches footing problems before they are buried and inaccessible.
Fence Post Depth and Spacing
The rule of thumb for fence post depth is one-third of the total post length below grade. A six-foot fence requires an eight-foot post (six above grade, two below). Posts set too shallow will lean under wind load, especially in loose or sandy soils. Post spacing of 6–8 feet is standard for most wood fence styles. Closer spacing adds rigidity; wider spacing saves materials but reduces structural integrity.
What the Contract Should Include
Beyond the standard contract elements (scope, materials, payment schedule, timeline), deck and fence contracts should specifically include: footing depth and diameter, post size and species, hardware specifications (fastener type, post cap style), permit responsibility, inspection schedule, and warranty on both materials and labor. For composite decking, confirm that the installation will comply with the manufacturer's specifications — failure to do so can void the product warranty.
A well-constructed outdoor space creates the foundation for a productive garden. Whether the goal is a deck adjacent to a container garden or a fence that defines growing zones, the structural quality of the build determines how long the design serves its purpose.
Understanding what goes into proper raised bed construction — materials, hardware, soil — from the raised beds complete guide provides useful context for evaluating a contractor's material knowledge across other outdoor construction projects as well.
Frequently Asked Questions
How long should a properly built deck last?
A deck built with pressure-treated framing, quality decking material, and proper footings should last 15–30 years depending on material choice and maintenance. Composite decking often carries 25–30 year manufacturer warranties. Wood decking requires periodic refinishing and may need board replacement after 10–15 years if not maintained.
Who is responsible for pulling the building permit — the contractor or the homeowner?
The contractor should pull the permit when they are the builder of record for the project. This places professional responsibility on them for code compliance. If a homeowner pulls an owner-builder permit, they accept responsibility for code compliance themselves. Clarify this in the contract before work begins.
What is the standard warranty for fence installation?
Labor warranties of one to two years are common for fence installation. Material warranties depend on the product — pressure-treated lumber typically carries a manufacturer warranty against rot and insect damage. Vinyl and composite fencing often carry 20–25 year manufacturer warranties. Confirm what is covered before signing.
Can a deck be added without a permit if it is freestanding?
It depends on local code. Many jurisdictions allow low platform decks (under 30 inches high) without a permit. Some require permits for any structure over a certain square footage regardless of height. Never assume a permit is not required — verify with the local building department before starting work.
What causes a fence to lean over time?
The most common causes are posts set too shallow, posts set in concrete that does not extend below the frost line, or posts that have rotted at the soil line. Proper post depth, quality post material (cedar or pressure-treated), and good drainage around the base extend fence life significantly.