The Question Every Essex Homeowner Eventually Asks
One window has gone misty. A second has a hairline crack. The handle on the third sticks. The cold-caller on the phone says you "really should" replace the lot before winter - £8,000, finance available. Your gut says that can't be right. Your gut is correct.
In nine cases out of ten, the frame is fine. It's the glass unit, the gasket, the hinge or the lock that's failed - and those are individual components you can swap out for a fraction of the cost of a whole new window. This guide puts real 2026 Essex numbers next to the sales pitch so you can decide with your wallet, not someone else's commission.
Per-Window Cost: Repair vs Replace in 2026
Like-for-like comparison. Standard bedroom-sized uPVC casement. Argon-filled, Low-E coated, 25-year guarantee. Fitted across our Essex and East London service area.
| Issue | Repair (fitted) | Full replacement (fitted) | You save |
|---|---|---|---|
| Misty / blown unit | £110 - £140 | £550 - £750 | £440 - £610 |
| Cracked pane | £120 - £180 | £550 - £750 | £430 - £570 |
| Failed gasket / draught | £60 - £90 | £550 - £750 | £490 - £660 |
| Dropped hinge | £60 - £110 | £550 - £750 | £490 - £640 |
| Broken handle / lock | £70 - £130 | £550 - £750 | £480 - £620 |
| Patio door glass | £220 - £420 | £1,200 - £2,200 | £980 - £1,780 |
Replacement prices assume a mid-range A-rated uPVC casement professionally fitted. Premium aluminium or composite replacements push the gap even wider.
Whole-House Comparison: A Typical Essex 3-Bed Semi
Twelve windows total - say four blown sealed units, two cracked panes, three draughty gaskets, two dropped hinges and one stuck handle. Real numbers for a typical Basildon, Brentwood or Romford 3-bed.
| Approach | 2026 total cost |
|---|---|
| Targeted repairs (12 windows) | £1,150 - £1,700 |
| Full house replacement (12 windows) | £6,600 - £9,000 |
| Saving by repairing | £5,000 - £7,300 |
That's a sum most homeowners would rather put toward a kitchen, a holiday or the mortgage. And the repaired windows perform identically: same energy rating, same security, same 25-year guarantee on every new sealed unit.
When Replacement Is Genuinely the Right Call
We do not repair every window we look at - sometimes replacement is the honest answer. Specifically:
- Rotten or split timber frames on older softwood windows where the glass channel no longer holds a seal.
- uPVC frames discoloured beyond cleaning - the structure is fine but the cosmetic case for replacement is real, especially before selling.
- Single-glazed windows in habitable rooms - retrofitting a double-glazed unit into a single-glazed rebate isn't possible. The frame itself has to change.
- Pre-1995 frames with welded corner failure - the frame is structurally moving and a new sealed unit won't sit flat.
- Whole-house renovation where you're also re-rendering or extending and the windows are coming out anyway.
For everything else - modern uPVC, modern aluminium, modern composite - repair is almost always the right answer for at least another 10-15 years.
The Energy Argument: Do New Windows Pay Back?
Replacement-window salespeople lean heavily on energy savings. The Energy Saving Trust puts the real number at £110-£235 per year saved by upgrading from single-glazed to A-rated double glazing on a detached house. The saving going from working double glazing to new double glazing is closer to £20-£40 a year - so a £7,000 spend takes 175+ years to pay back on energy alone.
Repairing a blown sealed unit, on the other hand, restores the original argon and Low-E performance immediately. You get the energy benefit back without the replacement bill.
The 3 Tests Before You Sign Anything
- Frame test: Push firmly on the frame from inside with the window closed. If it flexes, creaks or you can see daylight at the corners, the frame is failing - replacement is on the table. If it's solid, the frame is fine.
- Hardware test: Open and close every sash. If they all operate (even if some are stiff), the hardware can be serviced or swapped. Hardware never justifies a new window on its own.
- Glass test: Walk every window in good daylight. Misting, cracks, scratches and seal failure are all glass-only repairs - the frame stays where it is.
Pass two of three and you're a repair candidate, not a replacement one. Anyone telling you otherwise is selling, not advising.
What a Repair-First Quote Looks Like
- Free no-obligation home survey within 48 hours across Essex and East London
- Itemised quote per window - so you can pick which to do now and which to defer
- No deposit on jobs under £2,000
- 25-year manufacturer-backed guarantee on every new sealed unit
- One visit to measure, one to fit - typically within the same week
Get an Honest Comparison for Your Home
We'll come and look at every window, tell you which are repairable, which (if any) genuinely need replacement, and quote both options side-by-side. No pressure, no commission-led sales script.
Use our instant quote calculator for an indicative price in 60 seconds, or book a free survey across Basildon, Brentwood, Chelmsford, Romford, Hornchurch, Upminster and the wider 20-mile radius from SS15.