IWSM
    New Construction Guide 2026

    Impact Windows in New Construction Florida: Builder Upgrade or Wait Until After Closing?

    Builders mark up impact window upgrades 40–80%. Sometimes the smart move is taking the shutters, closing, and upgrading with better windows at 30–60% less through an independent contractor. Here's how to make the right call.

    Get Post-Close Estimate(754) 303-7130

    Florida Code: What's Required in New Construction?

    Florida Building Code requires all new construction to provide wind protection for glazed openings (windows, glass doors, skylights). How that protection is delivered depends on your county:

    County / ZoneImpact Windows Required?Acceptable AlternativeWhat Builders Choose
    Miami-Dade (HVHZ)MandatoryNone — must use impact glassImpact windows standard
    Broward (HVHZ)MandatoryNone — must use impact glassImpact windows standard
    Palm Beach County (coastal)Strongly requiredApproved shutters (but rare in new builds)Impact windows in most subdivisions
    Treasure Coast (IRC, Martin, St. Lucie)OptionalStandard glass + accordion shuttersMany builders use shutters; impact optional
    Inland Florida (Orlando, Tampa)Not requiredStandard glass acceptable in lower wind zonesNon-impact standard; shutters optional

    In Miami-Dade and Broward, you don't have a choice — impact windows are required. The only decision is which brand/quality level to get through the builder, or whether to negotiate builder inclusion and upgrade independently after closing.

    Builder Upgrade vs. Independent Install: The Financial Analysis

    Builders buy windows at contractor pricing (often 40–60% below retail) but charge buyers at or above retail plus a markup. That gap is your opportunity.

    Builder Upgrade Approach

    Base home price (with standard windows):$500,000
    Builder impact window upgrade (15 windows):+$9,000–$18,000
    Rolled into mortgage at 7%:+$60–$120/month
    Total over 30 years:+$21,600–$43,200
    ✅ Seamless process — done before you move in
    ✅ Rolled into mortgage (lower out-of-pocket)
    ⚠️ Builder markup 40–80% above wholesale
    ⚠️ Limited brand/quality choice
    ⚠️ Builder-grade glass may lack Low-E coating

    Accept Shutters + Independent Install

    Base home price (with shutters standard):$500,000
    WSM impact windows (15 windows, in-stock):$11,000–$16,000
    Paid out of pocket or PACE financed:$0 cash or PACE
    Actual installed cost (WSM pricing):$11,000–$16,000
    ✅ 30–60% less than builder pricing
    ✅ Choose premium brands (PGT WinGuard, ESW)
    ✅ Specify Low-E glass, STC rating, DP level
    ✅ Tax credit eligible (IRS 25C)
    ⚠️ Requires out-of-pocket or separate financing
    ⚠️ Takes 4–8 weeks after closing

    Bottom line: If the builder charges $15,000 for the upgrade and you can get the same quality installed for $11,000 post-closing — the shutters protect you for 4–6 weeks while you save $4,000 and get better windows. Run the numbers for your specific builder before deciding.

    What Builder-Grade Windows in Florida Typically Include

    Not all builder windows are created equal. Here's what you'll typically find across different price points:

    Builder TierTypical Window BrandLow-E Glass?DP RatingSHGCUpgrade Exists?
    Entry ($300–$450K homes)Generic or private-label❌ Often noDP+35–400.82+Yes — often at high markup
    Mid ($450–$700K homes)PGT (base model) or Mr. Glass⚠️ SometimesDP+40–500.35–0.55Yes — upgrade to WinGuard
    Upper ($700K–$1.2M)PGT WinGuard or ESW✅ UsuallyDP+50–600.23–0.27Often standard — verify SHGC
    Luxury ($1.2M+)PGT WinGuard, ESW, or Andersen✅ StandardDP+55–70+0.19–0.25Full spec — usually premium already

    Builder specs vary widely. Always request the exact product FPA/NOA number and product data sheet before accepting or upgrading. Don't rely on salesperson descriptions.

    14 Questions to Ask Your Builder Before Signing

    1
    "What exact brand and model of window is standard?"
    Why it matters: Generic vs. name brand makes a huge quality difference
    2
    "What is the FPA number or NOA number for the standard windows?"
    Why it matters: Lets you look up the full product spec sheet independently
    3
    "What is the DP rating of the standard windows?"
    Why it matters: Minimum code vs. best-practice ratings differ significantly
    4
    "Do the standard windows include Low-E glass?"
    Why it matters: No Low-E = 3–4× more solar heat gain in Florida summer
    5
    "What is the SHGC of the standard windows?"
    Why it matters: Above 0.40 in Florida = high AC costs for the life of the home
    6
    "What is the upgrade cost per window to impact?"
    Why it matters: Compare this directly against post-closing independent pricing
    7
    "What brand is the impact upgrade option?"
    Why it matters: Are you upgrading to PGT WinGuard or just slightly better generic?
    8
    "Does the upgrade include Low-E glass?"
    Why it matters: Some impact upgrades are still clear glass — defeats the purpose
    9
    "Is the upgrade price per window or all-in?"
    Why it matters: Clarify what's included: glass, frame, labor, permits
    10
    "Can I bring my own contractor for windows after closing?"
    Why it matters: Some builders restrict this through warranty clauses
    11
    "Will using a different window brand void my structural warranty?"
    Why it matters: Important to understand before declining builder upgrade
    12
    "Will the windows be installed before I move in if I upgrade?"
    Why it matters: Timing matters for move-in date and inspection sequencing
    13
    "Are accordion shutters included in the base price?"
    Why it matters: If yes, what brand and coverage — all openings or partial?
    14
    "If I skip the impact upgrade, can I negotiate a credit?"
    Why it matters: Sometimes builder will give $3,000–$8,000 off vs. standard windows if you plan to upgrade independently

    Builder-Common Brands vs. Premium Independent Options

    BUILDER COMMON

    Generic / Private Label

    • Entry-level builders use unbranded impact units
    • Meet minimum code requirements
    • Limited warranty (5–10 years)
    • Clear glass standard — no Low-E
    • Thin frames, basic hardware
    Recommend upgrading after closing
    MID-RANGE

    PGT (Base) / Mr. Glass

    • Legitimate certified brands
    • Meet HVHZ requirements
    • Moderate warranty (10 years)
    • Low-E sometimes included
    • Good for most homeowners
    Builder upgrade worth considering here
    PREMIUM

    PGT WinGuard / ESW

    • Florida's highest-rated impact brands
    • Full HVHZ NOA/FPA certification
    • Lifetime frame warranty
    • Low-E standard; SHGC 0.23–0.27
    • Best long-term value
    Available at Windows Stock Market — 30–60% below retail

    Why Post-Closing Installation Often Makes Sense

    →
    You get to choose exactly what you want

    Builder upgrades are often take-it-or-leave-it. Post-closing, you specify PGT WinGuard vs. ESW, Low-E glass, DP rating, STC, frame color, and hardware. You control every specification instead of accepting whatever the builder's contract specifies.

    →
    You can use in-stock inventory at WSM pricing

    Windows Stock Market carries in-stock PGT, ESW, and Mr. Glass at 30–60% below retail. Builder pricing is based on retail or above. On a 15-window home, the difference can be $5,000–$12,000.

    →
    You qualify for the IRS 25C tax credit independently

    Installing impact windows after closing as a homeowner improvement qualifies for the federal 25C energy efficiency tax credit (up to $600 per year, or 30% of the window cost). The builder installation rolled into a mortgage may not generate a separate qualifying credit.

    →
    The builder's shutters protect you in the meantime

    If the builder's base package includes accordion or panel shutters, the home is code-compliant and protected during the 4–8 weeks you're scheduling your post-close installation. You don't have an unprotected period.

    Frequently Asked Questions

    Are impact windows required in new construction Florida?↓
    Yes, in High-Velocity Hurricane Zones (Miami-Dade and Broward counties), impact-rated windows are required for all new construction — no alternative is acceptable. In other Florida wind zones, new construction must meet the Florida Building Code's wind protection requirements, which can be satisfied with impact windows OR standard windows plus approved hurricane shutters. Builders choose which path to take.
    Is it cheaper to add impact windows through the builder or after closing?↓
    It depends. Builder upgrades from standard glass to impact windows typically cost $200–$600 per window as an upgrade fee (on top of the base window cost). However, builders often mark up upgrades 40–80% above cost. After closing, you can install in-stock impact windows at Windows Stock Market pricing — often 30–60% less than retail — which may undercut the builder upgrade price significantly. The break-even analysis depends on the specific builder's markup and how many windows need upgrading.
    What is the difference between builder-grade impact windows and premium impact windows?↓
    Builder-grade impact windows meet minimum code requirements but often use thinner frames, basic laminated glass (without Low-E coating), and standard hardware. Premium impact windows (PGT WinGuard, ESW) use heavier aluminum frames, high-performance Low-E laminated glass with better SHGC values (0.23–0.27 vs 0.82+ for clear glass), better hardware, and longer warranties. The energy and noise difference is significant over the life of the home.
    Should I accept accordion shutters from the builder and upgrade windows later?↓
    Sometimes this is the financially smart move. If the builder's impact window upgrade is $15,000–$25,000 but you can get better windows installed by an independent contractor for $12,000–$18,000 after closing, the savings justify waiting. The builder's accordion shutters meet code and protect the home in the meantime. Evaluate the builder's exact upgrade pricing vs. independent pricing before deciding.
    What should I ask my Florida builder about impact windows?↓
    Ask: (1) What brand and model windows are standard? (2) What is the FPA or NOA number? (3) What is the DP rating? (4) Do the standard windows have Low-E glass? (5) What is the SHGC? (6) What is the upgrade cost per window to impact, and what brand is the impact option? (7) Will the upgrade include Low-E glass? (8) Can I use my own contractor for windows after closing? (9) Will non-builder windows affect my warranty?

    Bought a New Home in Florida? Let's Upgrade to Premium Impact Windows.

    Vieser Construction specializes in post-close upgrades for new construction buyers. We offer PGT WinGuard and ESW in-stock at 30–60% below builder pricing, with full permits and 2–3 week installation.

    Get Post-Close Estimate(754) 303-7130

    PGT WinGuard · ESW · Mr. Glass — in-stock · Licensed FL Contractor · Full permits included