Invisible grill for apartments, flats & housing societies: per-flat price and whole-society installation

The process is the same whether the society has 24 flats or 240. The managing committee or RWA passes a resolution (or a builder issues an RFQ) and sends one enquiry through this page. A verified installer visits once, measures a sample of flats on different floors plus the common areas — corridor edges, staircase voids, duct shafts, terrace parapets — and checks what the anchors will grip into. Within a few days the society receives a written bill of quantities: rate per opening type, the SS316 cable and track specification, the colour of the anodised track, the position and lock type of openable sections, the phasing plan and the warranty terms.

That document doubles as the spec sheet members sign off, so every owner who opts in gets exactly the same product. Installation is then phased tower-by-tower or floor-by-floor around residents, with no welding or hot work. At handover the installer registers one 10-year warranty for the building, and A1 Grills stays the escalation path if a warranty visit is ever refused. Owners who pay individually can still be invoiced separately under the society's rate — the survey, spec and installer are shared, the invoices need not be.

A single flat pays the published installed rate for its city: ₹95 per sq.ft in Gujarat, ₹135–149 per sq.ft in Mumbai, Delhi NCR and Maharashtra, GST extra, with the same rate for balconies and windows. A 100 sq.ft apartment balcony is therefore ₹9,500 before GST in Ahmedabad and ₹14,900 before GST in Mumbai. Openable sections and non-standard anchoring into parapet coping or ACP cladding are the two line items that move that number; floor height does not.

A society, RWA or builder order is quoted per project rather than per flat. The published per-flat rate is the reference point; what the project survey adds is the repeat-opening count, the common-area spans, the access and the phasing, and the installer writes the resulting per-opening rate into the bill of quantities. Because every installer in the network is GST-registered, the society or builder receives an itemised invoice under HSN 7308/7326 or SAC 9954 and can claim the 18% input credit on a commercial job.

The design that passes most committees has four properties. Cables run vertically only, 2 mm SS316 at a 50 mm gap, so the grill reads as a faint line rather than a pattern. The top and bottom tracks are anodised aluminium in one colour for the whole building — usually matt black, bronze or silver matched to the window frames. Each balcony has at least one openable section with an inside-only child-proof lock so the fire-escape objection falls away. And the system fixes into the slab or parapet with bolts, not welds, so it is reversible and leaves the elevation unchanged.

What committees reject is almost always the opposite: horizontal decorative bars (climbable), mild-steel sections that rust and stain the facade, and anything welded shut. If your society has already banned grills, ask the installer for the one-page spec sheet and a photo of a completed high-rise install — that is what most committees need to make an exception. Our invisible grill design guide shows the common configurations for balconies, French windows and sliding fronts.

Buyers of a new flat add a grill within months of moving in, and the result is the mismatched facade the architect never drew. Developers in the network's cities increasingly fit invisible grills tower-by-tower before handover, either as a standard safety feature or as a priced upgrade on the possession checklist. The installer quotes from the drawings plus one site visit, fabricates off-site, and installs once the facade and flooring are complete — typically the last trade in, so there is no damage from later work.

For the developer the benefits are a uniform elevation, a documented child-safety feature in the brochure and one warranty handed to the society at formation. For the buyer it means never applying to a committee for permission. Tell us the project location, tower count and approximate opening count and we connect you with an installer who has done handover work at that scale.