How Much Does a deck cost") in Lehigh Valley PA?

If you're planning a new deck in Allentown, Bethlehem, Easton, or anywhere in the Lehigh Valley, the first question is always the same: how much will it cost?

The short answer: $15–$75 per square foot installed, depending on materials, size, and features. For a typical 300-square-foot deck, that's $4,500–$22,500.

But the real answer depends on choices you haven't made yet — and those choices matter more than most contractors will tell you. This guide breaks down every cost factor so you can set a realistic budget before your first consultation.

Average Deck Costs in Lehigh Valley PA (2026)

Here's what Lehigh Valley homeowners are actually paying this year:

| Material | Cost Per Sq Ft (Installed) | 300 Sq Ft Deck | 500 Sq Ft Deck | |----------|---------------------------|----------------|----------------| | Pressure-Treated Wood | $15–$25 | $4,500–$7,500 | $7,500–$12,500 | | Cedar / Redwood | $25–$40 | $7,500–$12,000 | $12,500–$20,000 | | Composite (Trex, TimberTech) | $35–$55 | $10,500–$16,500 | $17,500–$27,500 | | Premium PVC (Azek) | $45–$75 | $13,500–$22,500 | $22,500–$37,500 |

These prices include materials, labor, and basic railing. They don't include permits, stairs, or custom features — we'll cover those below.

Why Lehigh Valley prices differ from national averages: Labor rates in eastern PA run 10–15% higher than the national average due to demand and the cost of living in the Allentown-Bethlehem-Easton metro. However, we're still significantly lower than the Philadelphia suburbs or northern NJ, making the Valley a sweet spot for value.

What Drives the Cost of a Deck?

1. Decking Material

Material is the single biggest cost factor — it accounts for 40–50% of your total project.

Pressure-Treated Wood ($2–$5/sq ft for materials alone) The most affordable option. Looks great when new, but requires annual staining and sealing to prevent rot, warping, and splinters. Expect to spend $300–$600/year on maintenance. Lifespan: 10–15 years.

composite decking ($8–$16/sq ft for materials alone) Our most popular choice for Lehigh Valley homeowners. Trex, TimberTech, and similar brands resist rot, insects, and fading. No staining or sealing — just wash it once a year. Lifespan: 25–50 years with manufacturer warranty.

Premium PVC ($12–$22/sq ft for materials alone) Azek and similar capped polymer boards offer the highest moisture resistance. Ideal for pool decks or ground-level builds where water exposure is constant. Lifespan: 30–50 years.

Our recommendation: For most Lehigh Valley homeowners, mid-range composite decking (Trex Select or TimberTech Pro) hits the best balance of upfront cost, appearance, and long-term value. You'll pay about $35–$45/sq ft installed and never think about staining again.

2. Deck Size and Layout

A simple rectangular deck costs less per square foot than one with angles, curves, or multiple levels.

Ground-level deck (200–300 sq ft): $4,000–$15,000
Single-level raised deck (300–500 sq ft): $8,000–$25,000
multi-level deck") (400–800 sq ft): $15,000–$50,000
Wraparound deck (500–1,000 sq ft): $20,000–$60,000

Every corner, angle, and level change adds labor time and material waste. A 400 sq ft L-shaped deck costs roughly 15–20% more than a 400 sq ft rectangle.

3. Height and Foundation

Decks attached to a second story or built on a slope require deeper footings, taller posts, and more structural lumber.

Ground level (0–2 ft): No additional structural cost
Standard height (3–5 ft): Add $1,000–$3,000 for posts and bracing
Elevated (6–10 ft): Add $3,000–$8,000 for engineering and structural support
Second story (10+ ft): Add $5,000–$15,000+ (may require steel beams)

In Pennsylvania, footings must extend below the 42-inch frost line — that's non-negotiable for code compliance, regardless of deck height.

4. Railing Systems

Railing is required on any deck more than 30 inches above grade in PA. Options range widely:

Pressure-treated wood railing: $15–$25/linear ft
Composite railing (Trex, TimberTech): $30–$60/linear ft
Aluminum railing: $40–$70/linear ft
Cable railing: $60–$100/linear ft
Glass panel railing: $80–$150/linear ft

For a 300 sq ft deck with 50 linear feet of railing, that's $750–$7,500 just for the railing system.

5. Stairs and Access

Basic 3–4 step staircase: $500–$1,500
Full-width stairs (deck-width landing): $1,500–$4,000
Spiral or curved stairs: $3,000–$8,000
Wheelchair-accessible ramp: $2,000–$6,000

6. Built-In Features

These are the upgrades that turn a deck into an outdoor living space:

Built-in bench seating: $500–$2,000
Planter boxes: $200–$800 each
Pergola or shade structure: $3,000–$12,000
Outdoor kitchen rough-in: $2,000–$5,000
Fire pit or fireplace pad: $1,000–$4,000
LED deck lighting package: $500–$3,000
Under-deck drainage system: $1,500–$4,000

Hidden Costs Most Contractors Don't Mention

Permits and Inspections

In Pennsylvania, most deck projects require a building permit. Costs vary by municipality:

Allentown: $75–$200
Bethlehem: $100–$250
Easton: $75–$200
Northampton County townships: $50–$175

At VM Power Decks, we handle all permit applications and inspections as part of our service — no extra charge.

Old Deck Removal

If you're replacing an existing deck, removal costs $5–$15 per square foot. A 300 sq ft tear-down runs $1,500–$4,500 depending on material and height.

Grading and Site Prep

Uneven ground, tree roots, or rocky soil (common in the Lehigh Valley's limestone terrain) can add $500–$2,000 for site preparation.

Landscaping Repair

Heavy equipment can damage grass and garden beds near the build site. Budget $200–$500 for post-construction landscaping touch-ups.

How to Get the Best Value on Your Lehigh Valley Deck

1. Build in Late Fall or Winter

Most homeowners want their deck built in spring, which means contractors are busiest March through June. Booking a fall or winter build can save 5–10% and often means faster scheduling.

2. Choose Composite Over Wood (Yes, Really)

Wood is cheaper upfront, but over 20 years you'll spend $6,000–$12,000 on staining, sealing, and board replacements. Composite costs more on day one but costs nearly nothing to maintain. When you factor in the lifetime cost, composite is often cheaper.

3. Keep the Design Simple

A rectangular deck with a single level maximizes square footage per dollar. Add complexity only where it serves a clear purpose — like a bump-out for a grill station or a lower level for a hot tub.

4. Work With a Certified Installer

Trex and TimberTech warranties require installation by a certified contractor. Using an uncertified builder can void your 25–50 year material warranty — an expensive mistake.

5. Get at Least Three Quotes

Compare quotes line by line. The cheapest bid often skips permits, uses thinner framing lumber, or doesn't include railing. Ask every contractor:

Are permits included?
What size and spacing for joists? (16" on-center is standard; 12" is better)
Is the quote for the complete project, or are there add-ons?
What warranty do you offer on labor?

What Does VM Power Decks Charge?

We price every project individually because no two backyards are the same. That said, here are our typical ranges:

Standard composite deck Is Better?") (300–400 sq ft): $12,000–$18,000
Large composite deck Is Better?") with railing and stairs (400–600 sq ft): $18,000–$30,000
Multi-level composite with built-ins (500–800 sq ft): $25,000–$50,000
Premium outdoor living space (deck + pergola + kitchen): $40,000–$75,000+

Every quote includes:

Free on-site consultation
Professional 3D design
All permits and inspections
Premium materials (Trex, TimberTech, or Azek)
5-year workmanship warranty
Full site cleanup

We've built over 1,000 decks across the Lehigh Valley since 2005, and our 5.0-star Google rating from 183+ reviews reflects the quality we deliver on every project.

Financing Your Deck Project

A new deck shouldn't drain your savings. We offer flexible financing options including:

12-month same-as-cash for qualifying projects
Low monthly payments with terms up to 144 months
Quick approval — most decisions within minutes

Learn more about our financing options or ask about payment plans during your free consultation.

Ready to Get an Exact Price for Your Deck?

Every backyard is different, and online estimates can only get you so far. The fastest way to get an accurate number is a free, no-obligation consultation at your home.

We'll measure your space, discuss your vision, walk you through material options, and provide a detailed written quote — typically within 48 hours.

Call us at (484) 743-7332 or request your free estimate online. We serve Allentown, Bethlehem, Easton, and communities within 70 miles of the Lehigh Valley.

Frequently Asked Questions

How much does a 12x16 deck cost") in PA?

A 12x16 (192 sq ft) deck in Pennsylvania costs $3,000–$10,000 for pressure-treated wood or $7,000–$14,000 for composite, installed. Add $1,500–$3,000 for railing and stairs.

Is composite decking worth the extra cost?

Yes, for most homeowners. Composite costs 40–60% more upfront but eliminates annual staining ($300–$600/year) and lasts 2–3x longer than wood. Over 20 years, total cost of ownership is comparable or lower.

How long does it take to build a deck?

Most residential decks take 1–3 weeks from start to finish. Permits add 2–4 weeks before construction begins. We recommend starting the process 6–8 weeks before you want to use your deck.

Do I need a permit to build a deck in PA?

Yes, most deck projects in Pennsylvania require a building permit. The exceptions are small, freestanding, ground-level platforms under 200 sq ft. We handle all permitting for our clients.

What's the best time of year to build a deck in Lehigh Valley?

Construction-wise, any time from March through November works in the Lehigh Valley. For the best scheduling availability and potential savings, consider booking in September through November.

Does a deck increase home value?

Yes. According to Remodeling Magazine's Cost vs. Value report, a composite deck Is Better?") addition recoups 60–70% of its cost at resale. In the competitive Lehigh Valley housing market, a quality deck can also help your home sell faster.