- Companies
- Plumbers and heating engineers
- Reading
- SD Maintenance Ltd
Company profile · Plumbers and heating engineers
SD Maintenance Ltd
SD Maintenance Ltd is a 4-year-old private limited company registered in Reading, company number 13735276, one of 221 plumbing and heating companies in Reading. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
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 SD Maintenance LtdOr 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.
Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House.
SD Maintenance Ltd over the years
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 £13K (-30.5%) on the year before, to £29K.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £79K against £61K owed within a year: 1.3 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £29K | £79K | £61K | 2 | |
| 30 Nov 2024 | £41K | £68K | £32K | 2 | |
| 30 Nov 2023 | £51K | £84K | £37K | 2 | |
| 30 Nov 2022 | £4,550 | £4,524 | £3,797 | 2 |
Where SD Maintenance Ltd is registered
The registered office is in Reading (RG6), in the Reading local authority area, South East. Show RG6 1LT on a map.
Other trade companies in RG6
- Climahub LtdPlumbers and heating engineers
- Aimbot LimitedCleaning companies
- Skylinez Home Improvements LimitedBuilders
- South East Mobile Tyres LtdMechanics and garages
- Ldhcarparts LimitedMechanics and garages
- JS Awbery Flooring LtdFloor and wall tilers
- Vipooconstructions LimitedBuilders
- Abcdc LtdSpecialist contractors
Also registered at this address
15 other companies use the same registered office as SD Maintenance Ltd.
- Bradley Builders Construction LtdBuilders
- DLM Golf LtdInstallers
- Ely Golf LtdLandscapers and gardeners
- Ems General Services LtdCivil engineering
- General Building Company & Sons LtdBuilders
- Harlton Electrical LimitedElectricians
- Hortlands Irrigation LtdLandscapers and gardeners
- I Basden Plumbing & Heating LtdPlumbers and heating engineers
- Laburnum Construction LimitedBuilders
- MBS Contracting LtdBuilders
- S Owers Building LtdBuilders
- SPD Creations LimitedProperty developers
- SPJ Electrical LtdElectricians
- Technical Commercial Management LimitedInstallers
- Youngs Heating & Plumbing Services LimitedPlumbers and heating engineers
What happens if SD Maintenance 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 13735276
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 November 2021 (4 years ago)
- Registered office
- 175 Wokingham Road, Reading, Berkshire, RG6 1LT
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 9 November 2025
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Reading
Other active plumbing and heating companies registered in Reading.
- Secureheat Ltd2014
- Sewell Plumbing & Heating Ltd2022
- SHM Plumbing and Heating Ltd2019
- SJS Plumbing and Gas Services Ltd2017
- SM Kitchen & Bathroom Installations Limited2015
- Small Job Plumbing Company Ltd2022
- SMS@Home Limited2024
- Soco Plumbing and Heating Ltd2023
All plumbing and heating companies in Reading · All trades in Reading · Plumbers and heating engineers across the UK
Frequently asked questions
When are SD Maintenance Ltd's accounts due?
SD Maintenance Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is SD Maintenance Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is SD Maintenance Ltd still trading?
SD Maintenance 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 SD Maintenance Ltd do?
SD Maintenance Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is SD Maintenance Ltd?
SD Maintenance Ltd was incorporated on 10 November 2021, 4 years ago.
What is the penalty if SD Maintenance 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 SD Maintenance 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.