Replace the glass without losing what makes the house look right.
0% Financing For 72 Months
Montclair homes carry more architectural detail than most, and a careless replacement erases it. We measure in person, talk the options through honestly, and never subcontract the installation.
- Factory-direct pricing on energy-efficient windows
- Insert or full-frame, chosen window by window
- Family-owned and local to North Jersey
Factory-direct pricing on energy-efficient windows
Call 973-755-1760
Ratings5.0
5.0Trusted Google Reviews
Get a free replacement estimate
Takes about 30 seconds. No obligation.
- 5.0 on Google 44+ homeowner reviews
- 0% for 72 months Financing on approved credit
- Factory-direct No middleman markup
- Our own installers Not subcontracted out
Window replacement for homes with real architecture
The housing stock changes street to street here, and so does the right replacement. A Craftsman in Upper Montclair wants different sightlines than a Victorian near the center, and a mid-century on the south end wants something else again. We look at the frame condition and the architecture together, preserve original casing with an insert wherever the opening allows it, and recommend full-frame only where the existing frame genuinely cannot be saved.
Schedule A Free MeasurementSigns your windows need replacing
- Condensation or fog between the panes
- Cold drafts you can feel with your hand
- Sashes that are painted shut, stick, or slam down
- Rot, soft spots, or peeling at the sill
- Single-pane glass or aluminum frames
- Rooms that never get comfortable in winter or summer
Checked two or more? Get a free estimate and we'll tell you honestly which windows need replacing and which can wait.
The right replacement for each opening
You don't have to replace every window the same way. We'll recommend a style and glass package for each room during your estimate.
Double-hung replacements
The most common swap. Both sashes tilt in for cleaning, and the look stays true to traditional homes.
Best for: colonials, capes, most bedrooms
Casement replacements
A crank-out window that seals tight against the frame. A strong upgrade where an old slider or double-hung leaks.
Best for: kitchens, hard-to-reach openings
Slider replacements
Replaces worn aluminum sliders with smooth-gliding, insulated frames that are easy to operate.
Best for: ranches, split-levels, wide openings
Bay and bow replacements
Rebuilds a sagging or drafty bay with new units, insulated seat and head boards, and proper support.
Best for: front living rooms, dining rooms
Energy-efficient glass
Double- or triple-pane insulated glass with low-E coatings to cut heat loss and block UV fading.
Best for: cold rooms, sun-facing walls
Basement replacements
Swaps rusted steel or rotted wood basement windows for tight-sealing hopper or slider units.
Best for: basements, finished lower levels
How your window replacement works
In-home measurement
We measure each opening, judge whether the frame can carry an insert, and leave samples for you.
Written quote
Pricing arrives written and itemized per window, with real time built in to consider it.
Custom order
Windows are manufactured to the sizes we measured, with installation booked on their arrival.
Remove, install, clean up
The old units are removed, the new ones fitted, sealed and trimmed, and the waste taken away.
Replace your windows now. Pay over six years with no interest.
Old windows cost you every month in heating and cooling. Ask about financing during your estimate and we'll show you the monthly number next to the total.
- 0%
financing for 72 months
On approved credit. Ask for full terms.
Why a local company replaces windows differently
| Feature | The Window Source | Typical big-box or national chain |
|---|---|---|
| Who measures your windows | The same team that installs them | A salesperson or third-party measurer |
| Insert vs. full-frame | Decided per window after inspection | One method for the whole house |
| Pricing | Factory-direct, written quote | List price, then a "today only" discount |
| Who installs | Our own crew | Often subcontracted |
| Old windows | Removed and hauled away | Sometimes an extra charge |
Window replacement projects near Montclair
On the job
FinishedDouble-hung replacements
Tilt-in sashes with grids to suit the house
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On the job
FinishedPicture windows
Large fixed glass for the best view of the yard
On the job
FinishedExterior trim and finish
Sealed and trimmed so the outside looks finished too
What your neighbors say
5.0 average from 44+ Google reviews
- Tyler Wadhams Google review
Window Source did a fantastic job replacing the windows in our house. We upgraded from double pane to triple pane because we were looking for sound reduction and better energy efficiency, and the difference is already noticeable. Everyone was very professional and the install was clean and well done. Highly recommend using The Window Source for any window needs.
- Joan Chambers Google review
Really successful start to finish window replacement experience. From first sales consultation, ordering and then installation. Efficient and great customer service and team work from everyone working in our home. Very pleased with our choice of The Window Source of Northern New Jersey.
- Chris Deska Google review
Clean and precise work done by the crew at my home in Ringwood. They replaced my windows and it was a very easy experience from start to finish. Highly recommended.
What to weigh before replacing windows in Montclair
Historic trim and lead paint
A large share of Montclair housing was built before 1978 and carries lead paint on the window trim. Our crews are trained and equipped for the removal practices that legally apply.
Architecture decides the profile
Sash proportion, grid pattern and frame profile decide whether a replacement suits a Victorian or fights it. We settle those details with you before a single unit is ordered.
Built to last on an old house
These houses have already stood a century, and the windows going into them should be specified accordingly. We recommend glass and materials rated for the climate rather than to a budget line.
Window replacement questions
Fog between the panes, rotted frames, and drafts around the sash usually mean replacement. A sticky sash or a bad lock can often be repaired. We'll tell you which is which during the estimate.
An insert fits a new window inside your existing frame, which is faster and keeps interior trim intact. Full-frame replacement removes everything down to the rough opening and is the right call when frames are rotted or out of square.
Replacing single-pane or leaky windows with insulated, low-E glass reduces drafts and heat loss. How much you save depends on your home, your current windows, and how you heat and cool it.
Most homes are done in one to two days once the windows arrive. Larger homes or full-frame replacements can take longer, and we'll give you a timeline with your quote.
No. Many homeowners start with the worst rooms and do the rest later. We can quote the whole house and phase it.
Yes. We work one opening at a time so each room is only open briefly, and we seal it up before moving on.
Have a different question? Call 973-755-1760 or send us a message.
See what replacing your windows would cost
We'll measure, check every frame, and leave you with a written quote. No pressure, no obligation.
