- Companies
- Property developers
- London
- Sustain Ltd
Sustain Ltd
- Company number
- 16608835
- Incorporated
- 28 Jul 20251 year trading
- Registered office
- 128 City Road, London, EC1V 2NX
- Nature of business
- Development of building projects; Construction of commercial buildings; Construction of domestic buildings
Sustain Ltd is a 1-year-old private limited company registered in London, company number 16608835, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 28 April 2027, and its first CT600 is due at HMRC on 27 July 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Public contracts won
Sustain Ltd has 3 public sector contract awards on record; the ones with their own published value total £581K, from 2016 to 2017. Source: Contracts Finder and Find a Tender award notices. For 1 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- WM Housing Group1 award
- Transport for London1 award
- Stevenage Borough Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| WM Housing Group | 2017 - 533 Heat metering options appraisal - AWARD | 29 Sep 2017 | |
| Transport for London | GLA80814 - Decentralised Energy Framework | Ceiling, not shown | 25 Jun 2017 |
| Stevenage Borough Council | SBC 0916 Communal Heating & Lift Refurbishment - Lead Designer and Client Representative Awarded | £581K | 6 Dec 2016 |
Where Sustain Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NX on a map.
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Shared registered office
2,436 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Sustain Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 28 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 29 Apr 2027 to 28 May 2027 | £150 |
| 1 to 3 months late | 29 May 2027 to 28 Jul 2027 | £375 |
| 3 to 6 months late | 29 Jul 2027 to 28 Oct 2027 | £750 |
| More than 6 months late | From 29 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 16608835
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 July 2025 (1 year ago)
- Registered office
- 128 City Road, London, EC1V 2NX
- Nature of business
- Development of building projects (SIC 41100)
Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 27 July 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- Sustain Properties Ltd2025
- Sustainable Development Initiatives Limited2023
- Sustainable Re Ltd2024
- Sustainable Smart Homes Ltd2021
- Sutherland Homes Limited1997
- Sutton Road 54-66 Limited2017
- Sutton Road Garage Limited1994
- Sutton SPV 1 Limited2025
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Sustain Ltd's accounts due?
Sustain Ltd's next accounts are due at Companies House by 28 April 2027 (in 197 days), covering the period to 31 July 2026.
When is Sustain Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 27 July 2026, due by 27 July 2027, and one for the period to 31 July 2026, due by 31 July 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sustain Ltd still trading?
Sustain Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Sustain Ltd do?
Sustain Ltd is registered under Development of building projects (SIC 41100); Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is Sustain Ltd?
Sustain Ltd was incorporated on 28 July 2025, 1 year ago.
Has Sustain Ltd won public sector contracts?
Yes. Sustain Ltd has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £581K), most recently from WM Housing Group.
What is the penalty if Sustain Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Sustain Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.