Exterior

Deck & Pergola Builder

Outdoor living, engineered to last.

A deck is a structure, not a weekend project — it carries load, ties to your house, and lives outdoors in the rain. We build decks and pergolas that are engineered, permitted where required, and detailed to shed water away from your home.

We build in cedar, composite, and PVC, with proper ledger flashing, code-compliant footings, and hidden fasteners for a clean deck surface. Pergolas and covered structures extend your season through the wet months. Where a permit is required for height or attachment, we handle it.

What's included

  • Cedar, composite, and PVC decking

    Cedar for the warmest look, composite for low upkeep, PVC for the longest life in the rain — we build in all three and walk the trade-offs on the visit.

  • Code-compliant footings and framing

    Footings sized and placed for your soil and frost depth, posts, beams and joists framed to span the load, and a hot-tub area reinforced when you tell us before the footings go in.

  • Ledger flashing and house attachment

    The ledger is bolted and flashed properly where the deck meets the house — the connection that fails on most decks we're asked to repair.

  • Pergolas and covered outdoor structures

    Pergolas, roofed structures and pavilions that extend the season through the wet months, engineered for the load they carry — including snow in Idaho and Montana.

  • Railings, lighting, and stairs

    Wood, aluminum or cable railing, code-compliant stairs and low-voltage lighting that make an elevated deck safe and usable after dark.

  • Permitting where required

    Attached, elevated and roofed decks usually need a permit; we tell you at the visit and handle the drawings, submittal and inspections.

How it works

  1. 1
    Free advice visit

    We look at the house connection, grade, soil and what you want the space to do, and leave you a scoped range.

  2. 2
    Complimentary 3D model

    The deck or pergola on your actual house and yard — height, stairs, railing and cover — before anything is built.

  3. 3
    Design, engineering and permits

    Drawings for the permit where one is required, engineering for roofed structures and hot-tub loads, submitted and tracked by our office.

  4. 4
    Footings and framing

    Utility locates, footings inspected, ledger flashed and bolted, posts, beams and joists framed.

  5. 5
    Decking, railing and cover

    Decking with hidden fasteners, railing and stairs, then the pergola or roof structure and any lighting, fans or gas.

  6. 6
    Final walkthrough

    Final inspection where permitted and a walk of the finished structure with you.

The same ten-step process runs every project we build — see how we work.

What it costs

Size sets the base range, then height, material and cover move it: an elevated deck 2–6 feet adds about 12% and over 6 feet about 25% for posts, bracing, stairs and railing; composite adds about 18% up front over cedar and takes staining off your calendar; a pergola adds about 15% and a roofed structure about 30%. Aluminum or cable railing adds about 12%, and reinforcing for a hot tub about 10%.

Deck, Pergola or Covered Patio cost guide

Prices as of Oct 7, 2026

StatePriced atStandardPremiumLuxury
WashingtonSeattle · 300 sq ft (exact)$25K – $35K$30K – $42K$35K – $50K
IdahoBoise · 300 sq ft (exact)$18K – $26K$22K – $30K$26K – $36K
MontanaBillings · 300 sq ft (exact)$16,500 – $23,000$19K – $27K$23K – $32K
ArizonaScottsdale · 300 sq ft (exact)$23K – $33K$27K – $38K$33K – $46K

Planning-level ranges from our current pricing tables, standard finish at a typical size unless a column says otherwise. Land, design and permit fees, utility connections and unusual soils are priced separately.

Price my project

Timeline

  1. Design and permits

    3D model, drawings and the permit where the jurisdiction requires one; engineering for roofed structures.

  2. Footings

    Utility locates, holes dug and footings poured and inspected.

  3. Framing

    Ledger, posts, beams and joists; stair stringers and railing posts.

  4. Decking, railing and cover

    Deck boards, railing, stairs, then the pergola or roof. Footings, framing and decking on a straightforward deck are measured in days, not months; covers, stairs and railing add time.

Permits and codes

Whether a deck needs a permit depends on your city and on the deck: attached, elevated and roofed decks usually do, small grade-level platforms often don't. Roofed structures and hot-tub loads need engineering, and lighting, fans, heaters or a gas fire feature add electrical and gas permits.

We tell you at the free advice visit which rules apply to your address, produce the drawings and engineering through our engineering and permitting team, and schedule the footing, framing and final inspections.

Reviewed on Google and Yelp

What clients say

  • "Sebastian came each and every time he said he would — very polite, respectful and professional! He fixed our fence in a timely manner and was always available for a call or text every step of the way. He is young and…" Read more

    Juanita G.
    Fence Repair · Lakewood · May 2024
    via Yelp
  • "Sebastian and his team did an exceptional job restoring my garage — both its structural integrity and the finish — after a car plowed into it. They prioritized the structural restoration within one day of visiting the…" Read more

    Fedon M.
    Garage Restoration · SeaTac · May 2024
    via Yelp
  • "I had a great experience with ID Builder Construction. I discovered a load-bearing beam in the house was compromised due to water damage, which would have prevented me from renting it. Sebastian came in at a reasonable…" Read more

    Nikhil A.
    Structural Repair · San Jose · Apr 2024
    via Yelp

Questions, answered

Cedar looks the warmest new and is the baseline in our estimate tool, but it needs regular cleaning and staining to hold up in the wet season. Composite adds about 18% up front and takes the staining off your calendar; capped composite and PVC resist moisture and fading best and are our Premium level. Most clients who plan to stay in the house choose composite or PVC.

Rules vary by city, but attached decks, decks elevated above grade and roofed structures almost always need one; small freestanding grade-level platforms often don't. Height, how the deck attaches to the house and its size are the three triggers, and we confirm your city's rules at the visit.

The ledger — where the deck bolts to the house — is the connection that fails most often, so it gets through-bolts or structural screws and a flashing detail that moves water out over the siding. Footings are dug to your frost depth and inspected before framing; both are code items we don't shortcut.

Yes — a pergola adds about 15% and a roofed structure about 30% in our estimate tool, plus engineering and any electrical or gas for lighting, fans and heaters. Our Coeur d'Alene pavilion and Scottsdale pavilion are both covered outdoor rooms built for their climates.

If the frame, ledger and footings are sound, yes — new decking and railing over the existing structure saves money. If the ledger isn't flashed, the joists are soft or the footings are undersized, a rebuild is the honest answer, and we tell you which after looking under the deck.

Wood railing is the baseline; aluminum and cable rail add about 12% and keep the view open. Glass panels are an option on view decks. All railing is built to code height and baluster spacing.

Footings, framing and decking on a straightforward deck are measured in days, not months; covers, stairs, railing and the permit add time. We give you the schedule at the visit.

Size, height, decking material, cover, railing and stairs, and extras like a hot tub or lighting. Our deck cost guide walks through each with the current ranges by state.

Financing available — pre-qualify in minutes, no credit score impact.

Pre-qualify through Acorn Finance ($1,000–$100,000, 20+ lenders) or HFS Financial (up to $450,000, no home equity required).

Book your free professional advice visit

Free estimate. Free 3D design model. Free on-site advice from the builder who prices the job. No obligation.