- Company number
- 05677791
- Incorporated
- 17 Jan 200620 years trading
- Registered office
- 12 Chelsea Close, Forest Park, Lincoln, Lincolnshire, LN6 0XF
- Nature of business
- Construction of commercial buildings
A1 Infrastructure and Building Limited is a 20-year-old private limited company registered in Lincoln, company number 05677791, one of 235 building contractors in Lincoln. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for A1 Infrastructure and Building LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £210K (-94.3%) on the year before, to £13K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £56K against £96K owed within a year: 0.6 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £13K | £56K | £96K | 2 | |
| 31 Jan 2025 | £223K | £127K | £91K | 2 | |
| 31 Jan 2024 | £98K | £85K | £111K | -2 | |
| 31 Jan 2023 | £132K | £85K | £107K | 2 | |
| 31 Jan 2022 | £110K | £11K | £67K | £73K | -2 |
| 31 Jan 2021 | -£72K | £19K | £158K | 2 | |
| 31 Jan 2020 | £51K | £1,705 | £5,706 | £95K | 2 |
| 31 Jan 2019 | £196K | £19K | £84K | £191K | 3 |
| 31 Jan 2018 | £277K | £95K | £172K | £207K | 3 |
| 31 Jan 2017 | £148K | £107K | £191K | £267K | 3 |
Where A1 Infrastructure and Building Limited is registered
The registered office is in Lincoln (LN6), in the Lincoln local authority area, East Midlands. Show LN6 0XF on a map.
Other trade companies in LN6
- Caf Property Investment LtdProperty developers
- JJ Paving LtdSpecialist contractors
- Death Row Electrical LtdElectricians
- Hymers Properties LtdProperty developers
- CMR Brickwork LtdBuilders
- Rac Design LtdMechanics and garages
- Lincoln Van Sales LtdMotor traders
- DQ Heating & Plumbing LtdPlumbers and heating engineers
What happens if A1 Infrastructure and Building Limited 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 31 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2029 | 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
- 05677791
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 January 2006 (20 years ago)
- Registered office
- 12 Chelsea Close, Forest Park, Lincoln, Lincolnshire, LN6 0XF
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 14 October 2025
- Charges (mortgages)
- 0 outstanding of 1 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Lincoln
Other active building contractors registered in Lincoln.
- Adamant Corporation Ltd2021
- Advanced Construction (Lincoln) Limited2013
- Ady Spencer Building Contractors Limited2006
- Aj Machin Construction Ltd2019
- All in Construction Ltd2018
- Allenby Construction Ltd2026
- Am Homebuild Ltd2018
- Ap Property Development Ltd2012
All building contractors in Lincoln · All trades in Lincoln · Builders across the UK
Frequently asked questions
When are A1 Infrastructure and Building Limited's accounts due?
A1 Infrastructure and Building Limited's next accounts are due at Companies House by 31 October 2027 (in 383 days), covering the period to 31 January 2027.
When is A1 Infrastructure and Building Limited's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is A1 Infrastructure and Building Limited still trading?
A1 Infrastructure and Building Limited 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 A1 Infrastructure and Building Limited do?
A1 Infrastructure and Building Limited is registered under Construction of commercial buildings (SIC 41201).
How old is A1 Infrastructure and Building Limited?
A1 Infrastructure and Building Limited was incorporated on 17 January 2006, 20 years ago.
What is the penalty if A1 Infrastructure and Building Limited 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 A1 Infrastructure and Building Limited 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.