Whole-Home Window Replacement in Wilmington, DE
Pella · Andersen · United Window Co. · Low-E Argon Standard · $20,000–$35,000 Typical Whole-Home Range · 5–6 Week Lead Time · FREE 2nd Opinions
Whole-home window replacement is the headline service in Jimmy's 35 years in the trade. From original 1920 Wilmington row-home wood double-hungs with rotted sash cords to 1990s vinyl that's hit end-of-life on the factory seal, the Precision Home Worx job is the same standard. Pella, Andersen, or United Window Co. windows installed with proper flashing, caulk, and paint — not just "swap and seal" like the national chains. Five to six week lead time from quote to install. One-year workmanship warranty on top of the manufacturer warranty pass-through.
Typical whole-home job at Precision Home Worx: 23 windows, around $30,000 installed. The recent Country Gates job ran 33 windows for $33,000 — vinyl United Window Co. units replacing builder-grade originals, finished in 7 weeks from quote to completion. The homeowner reported lower utility bills and a noticeably warmer house in winter.
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Window repair is also in scope and lives on this page as a section below — rotted frame, failed seal, broken sash cord, screen, weather stripping. Repair is often the right answer instead of whole-home, and Jimmy will tell you that straight at the estimate. Call (302) 321-3577 or request a free in-home estimate.
When Wilmington Homeowners Call About Their Windows
Most whole-home and window-repair calls fit one of these:
Rotted wood frames
Per Jimmy — rot damage is the single most common reason homeowners call about windows in Northern Delaware. Visible signs: peeling paint at the bottom of the sash, soft wood when you press a screwdriver into the sill, daylight visible at the corners. Once rot reaches the sash structure, repair becomes whole-home replacement quickly.
Failed seals — fogged glass between panes
Visible moisture between the two panes of a double-pane window means the IGU (insulated glass unit) seal has failed. The window still works mechanically, but its insulating value is gone — the dead air space between the panes has been replaced by humid outdoor air. Common on windows 15–25 years old. Most chain installers pitch you a whole-home replacement; we often just replace the IGU itself for $250 per pane.
Inoperable windows that won't open or close
Per Jimmy — "inoperable" is one of the two most common failure modes. Stuck sashes, broken sash cords, hard-to-open hardware on pre-1950 wood double-hungs, broken spring balances on newer vinyl. Sometimes a repair; sometimes a sign the whole window needs to go.
Drafty windows and rising utility bills
Drafts at the bottom of the sash, cold spots in winter, utility bills climbing for no obvious reason. The seal between sash and frame has worn down, weather stripping has compressed, or the original single-pane glass is just not insulating the way modern Low-E argon does. Whole-home replacement with Low-E argon typically cuts winter heating bills by 15–25%.
Outdated 1990s vinyl approaching end-of-life
Vinyl windows installed in the 1985–2005 builds across Bear, Newark, Claymont, and Hockessin are now 20–40 years old. The vinyl frames themselves are usually fine; the seals are not. About 30% of windows we look at in this era have at least one failed seal already and several more starting to show condensation. Whole-home replacement timing is typically dictated by how many seals have failed at the same time.
Original wood windows in Wilmington row homes
Pre-1950 Wilmington row homes — Brandywine, Trolley Square, the Highlands — often still have original wood double-hung windows with cotton sash cords, single-pane glass, and original glazing putty. Either preserve them with frame repair and re-glazing (a craft-restoration scope, sometimes the right answer for historic-district homes), or replace with new wood-clad or vinyl units that match the existing sightlines. Big decision; we walk through both options at the estimate.
Local Conditions That Affect Window Work in Northern Delaware
Northern Delaware's window stock spans 100+ years and four very different construction eras. Pre-1950 wood double-hungs, post-war steel-casement or wood replacement units, 1985–2005 builder-grade vinyl, and 2005+ low-E vinyl or fiberglass. Each era has its own typical failure mode and its own remodel decision tree.
Pre-1950 Wilmington row homes — original wood double-hungs
Brandywine, Trolley Square, the Highlands, Forty Acres, and older sections of Wilmington proper still have many homes with original wood double-hung windows. Cotton sash cords break (the most common failure), single-pane glass loses energy, and the original glazing putty fails after 80+ years. These homes also frequently fall under Wilmington historic-district overlays, which restrict what you can replace and how the exterior must look. We walk through both repair (preserve original sightlines, retain historic character) and replacement (modern energy efficiency, requires HDC review in protected areas) options at the estimate.
Wilmington historic district overlays
Several Wilmington neighborhoods — Brandywine, Forty Acres, parts of the Highlands — fall under historic-district overlays that restrict visible exterior changes. Window replacement in these areas typically requires Historic District Commission review and may require custom-sightline replacements (one-over-one or two-over-two sash patterns matching the original) rather than modern standard configurations. Adds 2–4 weeks to the project timeline and may shift the replacement to wood-clad units instead of vinyl. We handle the HDC paperwork.
1990s and 2000s vinyl approaching end-of-life
Builder-grade vinyl from 1985–2005 builds — common across Bear, Newark, Claymont, and parts of Hockessin — typically had 20-year factory seal warranties. Those have expired. The dominant failure mode here is failed IGU seals showing up as fogged glass between the panes. Once 3–4 windows have visible fog and several more are borderline, whole-home replacement becomes the practical answer because partial replacement of individual units rarely matches the new ones cosmetically.
Brandywine Hundred custom-match needs
Hockessin, Greenville, Centreville, and Chadds Ford homes built between 1990 and 2010 frequently had semi-custom or custom windows in the original build — half-rounds, bay/bow assemblies, picture windows with unique sightlines, or special-sized casements. Replacement here means matching the original detail, often with Andersen 400-Series or Pella Architect-tier units. Custom shapes add $1,000+ per unit over standard sizing.
Cold-snap seal failures and winter rot acceleration
Northern Delaware sees multiple freeze-thaw cycles per winter. Each cycle stresses the glass-to-frame seal as the materials expand and contract at different rates. Borderline seals frequently fail completely after a hard cold snap in January or February — which is why we see a spike in fogged-glass calls in late winter. Rotted-frame calls also spike in spring when homeowners notice the damage that the winter's freeze-thaw cycles accelerated.
Our Reviews
What's Covered
Whole-Home Window Replacement
Complete removal of existing windows, fresh flashing and weather barrier installation, new window installation (Pella, Andersen, or United Window Co.), interior trim work, exterior caulk and paint touch-up where needed. Typical whole-home job: 8–25 windows, 5–6 week lead time from quote to install day, install completed in 2–4 days on-site. Low-E argon double-pane glass is standard; triple-pane upgrade available where the budget supports it.
Single-Pane Glass Replacement
Historic Wilmington row homes with broken or cracked single-pane glass — re-glazing with new glass and proper glazing compound. $250 per pane.
Bay and Bow Windows
Bay window installation: $3,000+ per opening. Bow windows similar. We coordinate with the manufacturer on framing requirements; structural support is verified before installation.
Window Repair & Restoration
Repair is often the right answer instead of full replacement. Five common scopes:
Rotted wood frame repair — epoxy fill for small areas, sash or frame replacement for larger rot ($500+ per opening)
Failed IGU seal (fogged glass) — replace the sealed glass unit, keep the sash and frame ($250 per pane)
Broken sash cord or spring balance — replace the cord/balance, keep the sash
Worn weather stripping — replace seals around sash, often resolves drafts ($250 per opening)
Damaged window screen — re-mesh or full screen replacement ($100 per screen)
Custom-Shape Windows
Half-rounds, octagons, special arches — common in Hockessin and Greenville custom builds. $1,000+ per opening over standard sizing.
What's NOT included: Skylight install and replacement are NOT in our scope. Window security film, leaded-glass repair, and stained-glass restoration are specialty trades we'll refer you to.
Pricing
Per-window pricing varies by frame material, size, and tier. Below are published ranges from real Precision Home Worx projects.
| Service | Typical Price | Notes |
|---|---|---|
| Window screen — re-mesh or new | $100 each | On-site work |
| IGU (sealed glass) replacement | $250 per pane | For fogged glass |
| Single-pane glass replacement | $250 per pane | Historic homes |
| Weather stripping refresh | $250 per opening | Resolves drafts |
| Frame rot epoxy repair | $500 per opening | Localized rot |
| Standard window install (vinyl/fiberglass) | $800 per window | Single/double hung, slider, casement |
| Picture or fixed window install | $2,500 | Per opening |
| Bay or bow window install | $3,000+ | Per opening, structural |
| Custom shape (half-round, octagon) | $1,000+ | Per opening |
| Whole-home — Tier 1 (8–12 windows) | $20,000–$25,000 | Most common |
| Whole-home — Tier 2 (13–20 windows) | $15,000–$20,000 | Mid-tier |
| Whole-home — Tier 3 (20+ windows) | $20,000–$35,000 | Country Gates $33K / 33 windows |
What affects the price
Frame material
Frame material — vinyl ($800) vs. fiberglass ($800) vs. wood-clad ($800 mid-tier). Andersen and Pella premium wood-clad can be $1,000+ per window.
Window size
Window size — standard double-hung vs. oversized casement vs. patio door.
Historic-district requirements
Historic-district requirements — custom sightlines, HDC review, wood-clad over vinyl.
Tier pricing
Tier — Tier 2 actually comes in lower than Tier 1 because mid-volume jobs hit better per-unit pricing from the manufacturer.
Lead time
Lead time — standard 5–6 weeks; rush available with premium.
How Your Window Project Actually Happens
Brand and material recommendation
Three brands we install: Pella for premium wood-clad and architectural projects, Andersen for mid-to-premium tier (especially 400 Series), United Window Co. for value-tier vinyl. We recommend based on your home's era, your budget, and your historic-district requirements — not based on which brand pays the best dealer commission.
Pre-install communication
Within 2 weeks of the quote we confirm the install date. Accessibility instructions, where to park, which rooms get accessed first. Manufacturer windows are received at the Sentinel Storage location in Claymont and staged for install day.
Permit and inspection (rare for replacement)
Window replacement in Delaware typically doesn't require a permit unless the rough-opening size changes or the work is in a historic district. New construction does require permits and we handle that paperwork.
Written quote — itemized — within about a week
Estimate by email. Itemized: every window listed by location and size, frame material, glass spec, install labor, flashing materials, caulk, paint, and disposal. Quote good for 30 days.
Install day
Drop cloths and runners from your entry to the work area. Old windows removed one at a time — never leaving an opening overnight. New flashing and weather barrier installed. New window set, leveled, fastened, sealed. Interior trim adjusted. Exterior caulk and paint touch-up before we leave the opening — this is what separates us from "replace-only" chain installers.
One-year warranty + manufacturer pass-through
Comprehensive workmanship warranty dated from completion. Manufacturer warranties on Pella, Andersen, and United Window Co. units pass through directly to you — typically 10–20 years on glass seals and frame, lifetime on some manufacturer programs. If a warranty issue ever comes up, you call Jimmy at (302) 321-3577 — we handle it.
Free in-home estimate (within about a week)
Jimmy walks the house with you. Booties on. Every window inspected — operation tested (does it open and close?), seal condition (any fogging?), frame condition (any rot or peeling paint?). The walk-through usually takes 45–60 minutes for a typical home. We talk through whole-home vs. partial repair as we go.
Order lead-time — 5–6 weeks standard
Pella stock items: 4 weeks. Pella semi-custom: 6 weeks. Andersen: 5 weeks typical. United Window Co.: 4–5 weeks. Custom shapes, bay/bow, and special-sized units: 8–10 weeks.
Walk-through and education
Every window gets hands-on demonstration with the homeowner — lock test, lift test, screen removal, tilt-in cleaning if applicable. You learn how to operate every new window before we leave.
Why Precision Home Worx for Your Windows
Replace, Caulk, AND Paint — Not Just Replace
Per Jimmy, comparison vs. the national chains "only replace" while Precision Home Worx replaces, caulks the new opening, and paints the trim where the work disturbed the finish. The chains' install day ends with a clean new window, but rough exterior caulk lines and unfinished trim paint. We finish the opening completely. The work adds about 30 minutes per window — and saves you from hiring a painter after the chain crew leaves.
Three Real Brands — Pella, Andersen, United Window Co.
Three brands, three real tiers. Pella for premium and architectural needs. Andersen for the mid-tier homeowner who wants a known name. United Window Co. for the value-tier whole-home jobs where the homeowner is replacing 20+ windows on a budget. No off-brand vinyl from a no-name importer — when something fails in 8 years, you can buy a matching replacement from any window supplier in the region.
Honest Assessment: Repair or Replace?
National installers exist to sell whole-home jobs. Their salespeople are paid on the $25K–$35K average ticket. Precision Home Worx is paid for the work; if the right answer for your house is a $500 frame rot repair plus a $250 IGU swap instead of $30,000 of new windows, we'll tell you that at the estimate. About 20% of our window estimates result in a repair recommendation rather than whole-home replacement. The chains' rate is closer to 1%.
FREE 2nd Opinions on Chain Installer Quotes
Already have a quote from a local contractor? Email it to Jimmy or have him stop by. He'll review it for free — what's included (often: install only), what's not (often: paint, exterior caulk, weather barrier upgrades), and tell you straight whether the price is fair. No pressure either way.
Drop Cloths From Your Entry to the Work Area
Window installation creates dust — debris from old caulk, sawdust from trim adjustments, occasional drywall touch-up around the opening. About 200 square feet of canvas runners on a typical whole-home job, taped at the seams. Setup adds 30 minutes the first morning.
Sentinel Storage Staging — Windows Handled With Care
Pella, Andersen, and United Window Co. units are received at the Sentinel Storage location in Claymont and staged before the installation day. The advantage: windows are inspected for shipping damage before they show up at your home (catches manufacturer defects early), and they're not stacked in your driveway for 3 days. Each window goes from the storage facility to the installation opening in a single trip.
Whole-Home or Window Repair — How to Tell Which Your House Needs (and the $20K Mistake Homeowners Make Going Whole-Home Too Early)
Window replacement is one of the largest single home-improvement purchases most homeowners make — typically $20,000–$35,000 for a whole-home job. National chain installers exist to close that whole-home sale and their salespeople are compensated on it. The result is a real industry pattern of recommending whole-home replacement when targeted repair would solve the actual problem at 5–10% of the cost.
The decision tree, in plain English. If you have one or two visibly fogged windows and the rest are operating fine — that's an IGU seal failure, not a whole-home problem. $250 per pane to swap the failed unit, total cost $500–$1,500 to address all of them. If you have one or two windows that won't open or close properly and the rest work fine — that's a sash cord, spring balance, or hardware repair. Total cost a few hundred dollars. If you have visible rot on one window — that's a frame repair, $500. Whole-home replacement does not fix any of these problems faster or better than targeted repair; it just costs 20–40 times more.
When whole-home actually is the right answer: when 30% or more of the windows have failed seals, when frames are rotting in multiple locations on the same side of the house, when single-pane glass is driving real energy losses (visible drafts, ice on inside of glass during cold snaps, utility bills consistently higher than comparable neighbors), or when the homeowner wants a uniform new look across the whole house. The Country Gates job was an honest whole-home — 33 windows, multiple failed seals, drafts throughout, utility bills out of line. The homeowner replaced everything and the energy savings + comfort improvement justified the $33,000.
How to test thoroughly. Walk your home with a notepad. Count windows with visible fog between panes. Count windows that won't open or close easily. Count windows with visible rot. Compare that count to the total window count in your home. If the failed-window percentage is under 20%, targeted repair is almost always the right answer. If it's 40%+, whole-home starts making sense. Between 20% and 40% — depends on the age of the windows (if they're all from the same era, the others are probably starting to fail) and your budget. Jimmy will walk through this calculation with you at the free estimate — no pressure either way.
Real Precision Home Worx Window Project
Case Study
Country Gates Whole-Home Windows (N.K.) — 33 Windows, $33,000, 7 Weeks "Thank you Jimmy!!! He has fixed so many issues with our home and handled every job with precision and care. He fixed our sunroom and did an AMAZING job transforming our master bedroom." Project details: 33 builder-grade vinyl windows replaced with United Window Co. vinyl replacements. Project ran 7 weeks from quote to completion. Total cost: $33,000. Energy result: lower utility bills, much warmer in winter, drafts eliminated throughout.
This is the textbook whole-home job — the homeowner had failed seals across multiple windows, drafts in primary bedroom and living areas, and rising utility bills. Whole-home was the right answer here because the failure rate justified it. Most Precision Home Worx window estimates do not end up at this scope; targeted repair is the more common outcome.
Brands We Install
3, three brands across three tiers:
Pella Reserve, Pella Architect Series, and Pella 250 Series for value-tier vinyl. Pella showroom available for in-person sample viewing. Best for premium primary-bath windows, custom shapes, bay/bow assemblies, and historic-match installs in Brandywine Hundred.
Andersen 400 Series (Fibrex composite — homeowner favorite), Andersen 100 Series (Fibrex value tier), Andersen A-Series for premium architectural. Strong choice for the mid-tier whole-home job where the homeowner wants a known name.
United Window Co. vinyl windows — value-tier whole-home replacements where the homeowner is doing 20+ windows on a budget. The Country Gates project used United Window Co. throughout. Reliable, regional manufacturer, parts and service stay available.
FAQ’s
Walk your home and count: fogged windows (failed IGU), windows that won't open/close, visible frame rot. If under 20% of your windows have problems — targeted repair is almost always the right answer at 5–10% of whole-home cost. If 40%+ have failed — whole-home starts making sense. Jimmy walks through the math at the free estimate.
Tier 1 (8–12 windows): $20,000–$25,000. Tier 2 (13–20 windows): $15,000–$20,000 (better per-window pricing at higher volume). Tier 3 (20+ windows): $20,000–$35,000. Standard installed price per vinyl window: $800. Custom shapes: $1,000+. Bay/bow: $3,000+. Picture/fixed: $2,500. Frame material affects the per-unit number slightly.
Standard 5–6 weeks. Pella stock: 4 weeks. Pella semi-custom: 6 weeks. Andersen: 5 weeks. United Window Co.: 4–5 weeks. Custom shapes and bay/bow: 8–10 weeks. We confirm the install date within 2 weeks of quote signing.
Typically no — window-for-window replacement in the same opening doesn't require a permit. Exceptions: if the rough opening size is changing (rare), if the work is in a Wilmington historic district overlay (requires HDC review), or if the project is new construction. We handle any permit paperwork that does apply.
Per Jimmy's verbatim — vinyl doesn't require painting; wood windows do. Vinyl is the volume choice for whole-home replacements ($800/window installed standard). Fiberglass is more dimensionally stable in extreme cold and lasts longer than vinyl but is similarly maintenance-free. Wood (or wood-clad with vinyl/aluminum exterior) is the premium choice for historic-match installs and architectural projects but requires periodic re-finishing of the interior. Pella Reserve and Andersen 400 Series are the homeowner favorites here.
Yes — Wilmington Brandywine, Forty Acres, and Trolley Square historic overlays each have their own HDC review process. We handle the HDC paperwork and recommend wood-clad units (Andersen 400 Series, Pella Reserve) that match original sightlines. Adds 2–4 weeks to the project timeline.
Yes — typically 15–25% reduction in winter heating costs when replacing single-pane glass or failed-seal IGUs with new Low-E argon double-pane units. The Country Gates project (33 windows, $33K) reported "lower utility bills and much warmer in winter" after replacement. Payback period depends on your starting energy spend, climate exposure, and the gap between old and new performance.
Not currently. We accept major credit cards, Zelle, checks, and cash. For whole-home jobs over $5,000, standard terms are 50% on order (when manufacturer order is placed), balance at completion.
Our work is backed by a one-year comprehensive workmanship warranty dated at end of project completion. The warranty covers the install, the flashing, the caulk, the paint, and the trim. Manufacturer warranties on Pella, Andersen, and United Window Co. units pass through directly to you — typically 10–20 years on glass seals and frame, sometimes longer.