---
title: "Lansdowne Green Window Replacement"
ocid: "ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "SOUTHERN HOUSING"
published: "2026-02-10"
---

# Lansdowne Green Window Replacement

Buyer: SOUTHERN HOUSING  
Current stage: Award  
OCID: ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97.json)

## Summary

Southern Housing has awarded the Lansdowne Green Window Replacement contract to Cosyseal (Double Glazing) Limited, with the procurement conducted via an open procedure. The initiative, classified under the "Installation of windows" category, involves the installation of windows in properties owned and managed by Southern Housing, located in London, United Kingdom. This procurement, whose tendering stage concluded on 28th June 2024, moves forward into the award stage, with the contract starting on 1st April 2025 and continuing until 31st March 2027. The contract carries an estimated value of £4,876,229.23 GBP, excluding VAT, and presents opportunities within the "works" industry category.

This tender presents substantial opportunities for growth, particularly for businesses in the construction and glazing sectors capable of delivering comprehensive window installation solutions. The contract's duration of four years allows winning businesses to foster continued relationships and strengthen their presence in the London market, collaborating with a reputable buyer like Southern Housing. SMEs, in particular, may find this opportunity to be advantageous due to the procurement's suitability stance favouring them. This contract provides a stable income stream and the chance to enhance technical skills and capabilities over extended project timelines.

## Notice

Installation of windows within properties owned and managed by Southern Housing. The duration of the works is four years. The estimated total contract value is 5,126,000 GBP, excluding VAT.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/28f32d0f-4c1d-46c9-a482-5a9efcab94da |
| Notice type | Award Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 10 Feb 2026 |
| Submission deadline | 28 Jun 2024 |
| Future notice date | Not specified |
| Award date | 24 Mar 2025 |
| Contract period | 31 Mar 2025 - 31 Mar 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £4,876,229 |
| Lots value | Not specified |
| Awards value | £4,876,229 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SOUTHERN HOUSING |
| Locality | LONDON |
| Post town | Central London |
| Postcode | EC1M 5LA |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI4 Inner London - East |
| ITL 3 | TLI43 Haringey and Islington |
| Local authority | Islington |
| Electoral ward | Clerkenwell |
| Westminster constituency | Islington South and Finsbury |
| Delivery location | TLI London |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | COSYSEAL (DOUBLE GLAZING |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45421132 - Installation of windows

## Release History

- 10 Feb 2026 at 17:45 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/28f32d0f-4c1d-46c9-a482-5a9efcab94da

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/28f32d0f-4c1d-46c9-a482-5a9efcab94da
  10th February 2026 - Awarded contract notice on Contracts Finder
- https://www.mytenders.co.uk/search/show/search_view.aspx?ID=FEB170960
  NOTE: To register your interest in this notice and obtain any additional information please visit the myTenders Web Site at the link provided.

## Notice URLs

- http://www.southernhousing.org.uk

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-d0b17ddc-7ae6-404f-b6c7-3e8299cc4a97.json.