| Thiruvanmiyur and Besant Nagar sea-breeze balconies | Rs 26-40/sq ft for AC ledge and duct routes | Sea-side balconies where pigeons land on AC shelves before moving into damp duct corners. | Salt-air exposure, AC bracket spacing, duct depth, floor height, hook grade and wash access. | Useful when droppings return from the same AC-side pocket after every cleaning. |
| OMR and ECR apartment fronts | Rs 24-38/sq ft for exposed high-floor spans | High-rise balconies with longer openings, sea-breeze exposure and society finish expectations. | Floor access, wind side, span width, facade line, side returns and anchor choice. | A clean exterior border matters on visible apartment fronts, so a transparent net is usually preferred. |
| Velachery and Adyar utility balconies | Rs 22-34/sq ft for pipe-side nesting pockets | Utility balconies where pipes, drain corners and AC lines create shaded bird routes. | Pipe route, drain access, wall hold, drying clearance and corner tension. | The drain and wash corner should stay reachable after netting. |
| Anna Nagar and T Nagar older blocks | Rs 22-32/sq ft for older wall and beam gaps | Older apartment faces where weathered paint, beams and narrow ledges keep birds returning. | Wall condition, old drilling hold, ledge count, beam shape and safe inside access. | Older surfaces need a hold check before hooks are fixed. |
| Sholinganallur and Pallikaranai apartment ducts | Rs 24-38/sq ft for duct and shaft routes | IT-corridor apartments where common ducts, shafts and AC lines feed shaded nesting pockets. | Duct depth, shaft access, floor height, salt-air exposure and hook grade. | Best closed at the shared duct, not one balcony at a time. |
| Porur and Mogappair inland balconies | Rs 22-32/sq ft for standard inland spans | Inland flats with less salt exposure but the same AC-ledge and pipe-side nesting habit. | Span width, ledge count, wall hold, drying clearance and corner tension. | Less rust pressure than the coast, so standard hooks often suit. |
| Tambaram and Chromepet older homes and terraces | Rs 22-30/sq ft for terraces and older walls | Independent homes and older blocks with terraces, parapets and weathered walls. | Wall and old-plaster hold, parapet span, ledge count and safe access. | Older surfaces need a hold check before hooks are fixed. |