Last Updated: September 2026 | Reading time: about 10 minutes
Most Bengaluru window quotes price the frame and the glass, then stop. Three lines are almost always missing, and together they add 20 to 30 percent: prising the old frame out, taking the MS grill off and refitting it, and making good the plaster at the reveal. With those in, replacing one window in a Bengaluru flat in 2026 costs about Rs. 5,200 for a 2 by 2 foot bathroom vent and about Rs. 54,000 for an 8 by 7 foot balcony slider, GST included. A seven opening 2BHK in mid tier uPVC, retrofitted into the existing holes, lands between Rs. 95,000 and Rs. 1.25 lakh. What moves that number is not the profile brand but whether the old opening is reused or cut wider, a decision that swings civil work from Rs. 500 to Rs. 12,000 per window. Send myNivasa a photo of one window with a tape across the opening and we will price the flat.
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What a Retrofit uPVC Window Costs Per Opening in a Bengaluru Flat
Windows are sold by the square foot of the opening, not by room area and not by the piece. myNivasa publishes a Bengaluru band of Rs. 400 to Rs. 700 per square foot for uPVC supply, with fitting a further Rs. 150 to Rs. 300. Take the mid point, Rs. 550 plus Rs. 225, and every opening prices itself at Rs. 775 per square foot.
So a 4 by 4 bedroom window is 16 square feet, or Rs. 12,400, and an 8 by 7 balcony slider is 56 square feet, or Rs. 43,400. The table below prices every common opening. Note that the bathroom vent still costs Rs. 3,100, because a small window carries almost the same hardware and the same man day as a large one.
The commonest mistake is measuring the glass instead of the opening. A window that reads as two 2 foot panes is not 8 square feet, it is a 16 square foot hole once frame and mullion are counted, which is how homeowners under budget glazing by a third.
Three more lines follow, covered below. For that 4 by 4 bedroom window in a sound opening the honest all-in is Rs. 12,400, plus Rs. 500 removal, plus Rs. 1,800 to lift and refix the grill, plus about Rs. 1,000 of plaster patching. That is Rs. 15,700 before tax and about Rs. 18,500 with 18 percent GST, the number to hold quotes against.
Scale it up. A standard Bengaluru 2BHK has about seven openings, roughly 87 square feet. At Rs. 775 that is Rs. 67,425 of supply and fitting, plus Rs. 3,500 of removals, about Rs. 9,000 of grill work and Rs. 7,000 of making good. Add GST and the flat lands near Rs. 1.02 lakh, which is why the realistic band is Rs. 95,000 to Rs. 1.25 lakh.
I have never once seen a Bengaluru window quotation that priced the grill. It comes off in ten minutes and goes back in two hours, and on a five window flat that is nine thousand rupees nobody budgeted.
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We measure every opening and confirm whether a retrofit will work, on the same visit.
WhatsApp UsCall +91 94499 00222- uPVC window replacement
- Fitting a new unplasticised polyvinyl chloride framed window in place of an existing one. The profile must carry a BIS ISI mark under IS 17953:2023 to be sold in India.
- Retrofit replacement
- Seating that window in the existing opening without cutting or widening it, which keeps civil work to Rs. 500 to Rs. 2,000 per opening and usually finishes in a day.
- uPVC supply in Bengaluru runs Rs. 400 to Rs. 700 per square foot of opening, fitting a further Rs. 150 to Rs. 300.
- Mid tier is Rs. 775 per square foot, so a 4 by 4 bedroom window is Rs. 12,400 before removal, grill and tax.
- One opening all-in runs Rs. 5,200 for a bathroom vent to about Rs. 54,000 for a balcony slider.
- A seven opening 2BHK retrofit lands between Rs. 95,000 and Rs. 1.25 lakh with 18 percent GST included.
- Retrofitting into a sound opening cuts 15 to 30 percent off every window.
- Refitting the MS grill costs about Rs. 1,800 per opening and appears on almost no Bengaluru quotation.
| Opening size | Supply and fitting |
|---|---|
| Bath vent, 4 sq ft | Rs. 3,100 |
| Kitchen, 12 sq ft | Rs. 9,300 |
| Bedroom, 16 sq ft | Rs. 12,400 |
| Living, 30 sq ft | Rs. 23,250 |
| Balcony slider, 56 sq ft | Rs. 43,400 |
Reusing the Old Window Opening Versus Cutting a New One
This decision sets the bill, and it is made on day one, usually before anyone has looked closely at the wall. If the existing hole is sound and the size suits you, the new frame drops straight in and the opening finishes the same day. Civil work stays between Rs. 500 and Rs. 2,000, and the all-in cost comes in 15 to 30 percent below the alternative, per the 2026 replacement cost analysis published by Studio Matrx.
Cut a new frame and a different trade arrives. The opening is broken, the lintel recast, the wall made good on both faces. Civil work moves to Rs. 3,000 to Rs. 12,000 per opening, and the same source puts the cutting, lintel and plaster addition at Rs. 4,000 to Rs. 8,000 on one window, plus several days of dust instead of one.
Three situations still justify cutting: the old timber frame has rotted and taken the plaster with it, the opening is out of square by more than about 15 mm, or the room genuinely needs more light. Outside those, cutting a Bengaluru apartment wall is money spent on dust.
| Criterion | Retrofit | New frame |
|---|---|---|
| Structural opening | Reused as it is | Cut, widened or re-lintelled |
| Civil work per opening | Rs. 500 to Rs. 2,000 | Rs. 3,000 to Rs. 12,000 |
| Plaster making good | Patch at the reveal only | Full band around the opening |
| Dust and downtime | Often one day | Several days per opening |
| Effect on all-in cost | 15 to 30 percent lower | Baseline, plus Rs. 4,000 to Rs. 8,000 |
| Choose it when | Opening is sound and same size | Wall has failed or you are resizing |
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WhatsApp UsCall +91 94499 00222Removal, Grill Refit and Plaster Making Good: What the Quote Leaves Out
Taking the old window out. Prising the frame, carting away scrap and tidying debris runs Rs. 300 to Rs. 800 per opening, so Rs. 3,500 on a seven window flat. Above the third floor add scaffolding at Rs. 800 to Rs. 2,200 per opening, which is the argument for doing every window in one visit.
The grill. This is the Bengaluru specific one. Almost every flat window here has an MS grill bolted across it, and it must come off before the old frame moves and go back after the new one is sealed. Budget about Rs. 1,800 per opening for removal, storage, repainting the cut ends and refixing. If it is being replaced instead, myNivasa prices invisible grill at Rs. 130 to Rs. 200 per square foot, with installation a lump sum of Rs. 1,000 to Rs. 3,000 rather than a per square foot charge.
Making good. Even a clean retrofit leaves damaged plaster at the reveal needing patching, priming and matched paint, about Rs. 1,000 per opening. On a new frame job that band runs around both faces.
What your apartment association will and will not allow
The external face of the building is common property, and under the Karnataka Apartment Ownership Act 1972 the association manages the common areas and sets the rules for their use. A like for like replacement in the same opening and colour is routine. A change of frame colour or glass tint needs written permission first, and get it before material is ordered. I have watched a family pay a restocking charge on eleven white frames because the association wanted brown.
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WhatsApp UsCall +91 94499 00222Single Glass, DGU or Laminated for Bengaluru Traffic Noise
Glazing is the second largest lever after the retrofit decision, and the one homeowners over specify. A single 5 mm pane is adequate for a bathroom vent or anything facing an internal courtyard. A double glazed unit, two panes with a sealed air gap, is where the gain sits: Saint-Gobain and the wider glass industry put its reduction at 25 to 40 decibels, and an acoustic unit of laminated panes at up to 45. The cost step is real. A premium uPVC system with a double glazed unit runs Rs. 900 to Rs. 1,500 per square foot against Rs. 400 to Rs. 700 for the ordinary single glazed build, so a 30 square foot living room window jumps from Rs. 23,250 to near Rs. 45,000.
So specify it only on openings facing a main road, a night service lane or a Metro alignment. On a typical 2BHK that is one or two windows, not seven. A double glazed unit on a kitchen window facing the internal duct is Rs. 15,000 spent on a wall you already cannot hear through. Spend the difference on hardware: a multi point lock that pulls the sash tight against the gasket does more for noise and rain than an extra pane.
uPVC, Aluminium or Wood: Which Frame Survives a Bengaluru Monsoon
Bengaluru punishes windows in a particular way. The problem is not heat but driven rain from the west through two long wet spells a year, hitting a frame that has baked through the dry months. What fails here fails at the joint.
uPVC handles that best for the money. It does not rust or swell, and the gasket rather than the material seals, so a well welded corner stays watertight. The national range is Rs. 250 to Rs. 800 per square foot. Insist on the BIS ISI mark: since IS 17953:2023 every uPVC profile sold in India must carry one, and it separates a correctly compounded profile from a thin section that sags on a wide sash within three summers.
Aluminium spans Rs. 350 to Rs. 3,000 per square foot, powder coated systems around Rs. 450 to Rs. 950. It is the right answer for very wide sliders, where uPVC would need reinforcement anyway.
Wood, at Rs. 500 to Rs. 1,500 and beyond for teak, I support only in independent houses with a deep chajja over the opening. On a flush apartment facade a west facing timber window needs repolishing every second year.
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WhatsApp UsCall +91 94499 00222Frequently Asked Questions
Do I need BBMP permission to replace windows in a Bengaluru flat?
No, not for a like for like replacement in the existing opening, which is maintenance rather than a change to the sanctioned plan. You do need written association permission, because the external face is common property under the Karnataka Apartment Ownership Act 1972.
Is uPVC or aluminium better for a Bengaluru apartment?
uPVC for most openings, aluminium for very wide sliders. uPVC costs Rs. 400 to Rs. 700 per square foot in Bengaluru against Rs. 350 to Rs. 3,000 for aluminium, and seals on a gasket that copes with driven rain.
How long does it take to replace all the windows in a 2BHK?
Three to five working days for a seven opening 2BHK if every window is a retrofit into a sound hole, since each opening is close to a one day job and two run in parallel. Cutting any opening adds several days for that window alone.
Can I keep my existing MS grill when the window is replaced?
Usually yes. Budget about Rs. 1,800 per opening for removal, storage, repainting the cut ends and refixing. Replace it only if the bar ends have rusted through where they enter the wall.
Is double glazing worth the money in Bengaluru?
Only on openings facing a main road, a busy service lane or a Metro alignment. A double glazed unit cuts 25 to 40 decibels and pushes the rate from Rs. 400 to Rs. 700 per square foot up to Rs. 900 to Rs. 1,500, which justifies one or two windows in a 2BHK.
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WhatsApp UsCall +91 94499 00222Limitations, Sources and Final Word
Every figure here is a 2026 Bengaluru range for apartment work, excluding GST unless stated. Rates move with profile brand, glass, hardware and floor level, so a site measurement can change a quote materially. Independent house work prices differently and structural changes are outside this scope.
Sources for the figures attributed above: Bureau of Indian Standards, IS 17953:2023; Saint-Gobain Glass on acoustic insulation; Studio Matrx, Window Replacement Cost in India 2026; Karnataka Apartment Ownership Act 1972, Section 16. All myNivasa bands are our own published Bengaluru figures.
Take the tape to the opening rather than the glass, and settle the retrofit question before shortlisting a brand. A sound opening reused well with an ordinary ISI marked profile beats a premium profile in a badly cut hole. For the wider picture see our home renovation cost in Bengaluru guide, our renovation cost per square foot breakdown, our balcony enclosure and BBMP rules guide and our Whitefield apartment renovation costs.
myNivasa works out of 2nd Floor, Sapthagiri Complex, 265/1, Kaggadasapura Main Rd, Vignan Nagar, Bengaluru, Karnataka 560075, across Marathahalli, Whitefield, HSR Layout, Sarjapur Road, Indiranagar, Koramangala, JP Nagar, Bellandur, Hebbal, Yelahanka, Electronic City and Bommanahalli. Call +91 94499 00222 or write to [email protected].
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