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Design-Build• 10 min read• July 30, 2026

Design-Build vs. Hiring Separate Contractors for Your Long Island Backyard

Nassau County & Suffolk County, NY

You've decided to transform your backyard. Now comes the biggest decision: do you hire one company to design and build everything, or do you hire a landscape architect for the plans and then bid out the construction to separate contractors? This post breaks down both approaches honestly — the real costs, timelines, risks, and results — so you can make the right choice for your project.

Luxury backyard project completed by design-build firm on Long Island

One Team vs. Many: Which Approach Wins?

The Two Approaches to a Backyard Renovation

When Long Island homeowners plan a major backyard project — a pool, patio, landscape, outdoor kitchen — they typically choose between two paths:

Option A: Design-Build (One Company Does Everything)
You hire a single firm that designs your backyard, engineers the plans, pulls the permits, and builds the entire project with their own crews. One contract, one point of contact, one team responsible for the outcome.

Option B: Separate Specialists (You Manage Multiple Contracts)
You hire a landscape architect or designer to create the plans. Then you bid out the construction to a pool company, a masonry contractor, a landscaper, and possibly an electrician and plumber. You manage the schedule, resolve conflicts between trades, and hope the final result matches the design.

Head-to-Head Comparison

FactorDesign-BuildSeparate Contractors
Total Cost15–25% lower on averageHigher due to markup stacking + change orders
Timeline5–9 months total8–14 months (sequential scheduling)
CommunicationOne point of contactYou coordinate 3–5 companies
AccountabilityOne company owns the resultFinger-pointing between trades
Design AccuracyDesign matches build (same team)Build often deviates from design
Change OrdersRare (designs are buildable from day one)Common (designs created without builder input)
Stress LevelLow — you're a client, not a project managerHigh — you're managing the project
WarrantySingle warranty covers everythingSeparate warranties, coverage gaps

The Real Cost Difference

Let's use a real-world example. A $250,000 backyard project on Long Island that includes a gunite pool, bluestone patio, outdoor kitchen, landscape plantings, and lighting:

Separate Contractors Approach:

  • Landscape architect design fee: $15,000–$25,000
  • Pool company bid: $120,000 (includes their markup on the architect's pool design)
  • Mason for patio/kitchen: $65,000
  • Landscaper for plantings: $35,000
  • Electrician for lighting: $12,000
  • Change orders (inevitable): $15,000–$30,000
  • Total: $262,000–$287,000

Design-Build Approach:

  • Design fee (included in project): $0 separate charge
  • Complete project contract: $220,000–$250,000
  • Change orders: minimal (design was buildable from start)
  • Total: $220,000–$250,000

The savings come from eliminating redundant markups, preventing change orders through integrated design, and efficient scheduling that reduces labor costs. On a $250K project, that's $30,000–$40,000 in savings — plus months of your time not spent managing contractors.

The Timeline Difference

Time is the hidden cost most homeowners don't account for. Here's how the two approaches compare on a typical Long Island backyard project:

Separate Contractors: 8–14 Months

  • Find and hire architect: 2–4 weeks
  • Design phase: 6–10 weeks
  • Bid out construction (get 3 bids per trade): 4–6 weeks
  • Wait for pool company availability: 4–8 weeks
  • Pool construction: 8–12 weeks
  • Wait for mason availability: 2–4 weeks
  • Hardscape construction: 4–6 weeks
  • Landscaping: 2–3 weeks
  • Lighting: 1–2 weeks
  • Resolve conflicts and punch list: 2–4 weeks

Design-Build: 5–9 Months

  • Consultation and design: 3–5 weeks
  • Permitting: 4–8 weeks
  • Construction (all trades coordinated): 12–20 weeks
  • Final walkthrough: 1 week

The design-build approach saves 3–5 months because trades overlap instead of waiting in sequence, and there's no bidding phase eating up weeks of your summer.

When Separate Contractors Make Sense

To be fair, there are situations where hiring separately can work:

  • Very small projects: If you're just adding a patio or a few plantings (under $30,000), a single mason or landscaper is fine.
  • You're a general contractor yourself: If you have construction management experience and enjoy coordinating trades, you can save the design-build firm's overhead.
  • You already have an architect you love: If you've worked with a landscape architect before and trust their designs, you may prefer to keep that relationship and bid out construction.

But for projects over $100,000 that involve multiple trades (pool + hardscape + landscape + lighting), the design-build model almost always delivers a better result at a lower total cost with far less stress.

The Accountability Problem

This is the issue homeowners don't anticipate until they're in the middle of it. When something goes wrong on a multi-contractor project — and something always goes wrong — who's responsible?

The pool company says the mason graded the deck wrong. The mason says the pool company left the site a mess. The landscaper says the irrigation was supposed to be roughed in before the patio went down. The architect says the contractors didn't follow the plans. And you're standing in your half-finished backyard trying to figure out who to call.

With design-build, there's one answer: the design-build firm. They own every aspect of the project. If the grading is wrong, they fix it. If the pool and patio don't align, they resolve it. You never have to mediate between contractors or figure out whose warranty covers what.

What About Design Quality?

Some homeowners worry that a design-build firm won't produce designs as creative as a standalone landscape architect. This was true 20 years ago — but not anymore.

Modern design-build firms like Cardi Design & Build employ dedicated designers who create photorealistic 3D renders, understand current design trends, and have the added advantage of knowing exactly what's buildable and what it costs. Their designs aren't theoretical — they're informed by thousands of hours of construction experience.

In fact, design-build designers often produce more creative solutions because they know the full range of what's possible. A standalone architect might design a beautiful concept that turns out to be unbuildable or wildly over budget. A design-build designer creates beauty within reality.

Questions to Ask Any Design-Build Firm

If you decide design-build is the right approach (and for most Long Island homeowners investing $100K+, it is), here are the questions to ask before signing:

  1. Do you have an in-house design team, or do you subcontract the design?
  2. Can I see 3D renders of my project before construction begins?
  3. Who will be my single point of contact throughout the project?
  4. Do your crews handle all trades, or do you subcontract portions?
  5. What's included in your warranty, and how long does it last?
  6. Can I speak with 3 recent clients whose projects are similar to mine?
  7. How do you handle changes or additions once construction starts?
  8. What's your typical timeline for a project of my scope?

Why Cardi Design & Build

At Cardi Design & Build, we've built our company around the design-build model because we've seen firsthand how much better the results are for homeowners. Our in-house design team creates photorealistic 3D renders of every project. Our construction crews handle pools, masonry, landscape, lighting, and outdoor living structures — all under one roof.

We serve homeowners across Long Island — from the Gold Coast estates of Old Brookville and Sands Point to the waterfront properties of the Hamptons and the family neighborhoods of Dix Hills, Melville, and Commack. Every project gets the same level of design attention and construction quality, regardless of size.

If you're planning a backyard transformation and want to see what's possible, schedule a free consultation. We'll visit your property, discuss your vision, and show you a 3D render of your future backyard — before you commit to anything.

See Your Backyard Before It's Built

Schedule a free design consultation with Cardi Design & Build. We'll create a photorealistic 3D render of your project — so you know exactly what you're getting before construction begins.