Electrical installation, switchboard upgrades, lightning protection and maintenance for condominiums, hospitals, MRT stations, heritage buildings and commercial properties. Family-run, with our own Licensed Electrical Worker in-house.
Our track record spans builders, electrical contractors, building managers, Singapore's rail operator, technology firms and owners. Most of it comes through relationships that have lasted years. Below is a selection; full list on request.
Electrical subcontractor for condominiums, landed homes, factories and public buildings.
Installation crews and supervision for larger electrical firms on residential, healthcare and education projects.
Direct contracts for switchboard upgrades and long-term servicing of common areas.
An SMRT registered contractor since 1998, working in stations, depots and on viaducts.
Field installation for companies rolling out smart meters, parking systems and fire safety equipment.
Attractions, places of worship, workshops and private owners who come to us directly.
We take a job from load calculation through installation, testing and SP turn-on, then keep it running with scheduled maintenance.
Needs assessment, load calculations, equipment selection and electrical drawings.
Distribution boards, switchboards, lighting, power points, CCTV and EV chargers, for new builds and replacements.
Inspection and testing to find the fault, then repair or replace what's needed.
Periodic inspections, preventive and corrective maintenance, earthing and lightning protection checks.
We act as your Licensed Electrical Worker for Electrical Installation Licence applications and annual renewals.
Pre-energisation testing, LEW technical advice, and liaison with SP Group for shutdowns and turn-on.
A selection of 44 from more than 200 projects since 1971. Our full track record is available on request.
New main switchboards, ACBs and protection relays for both blocks, contracted directly with the building's MCST.
Aug 2026 – May 2027
Electrical and ELV works on the 4th and 18th storeys, for the electrical contractor Ngee Cheng Electric.
Electrical installation and testing for 161 homes in Phase 11, working alongside the main contractor from the first underground pipes.
Electrical installation for Residential Block 3, delivered with our own crew and finished with no delay charges.
Preventive and corrective maintenance at stations, depots and viaducts on the North–South & East–West Lines, Circle Line and Bukit Panjang LRT.
Lightning protection and earthing for the new Mandai Entrance Portal, installed at night over a live road junction and tested to BCA requirements. Inside the park we have also completed electrical works for restaurants, the VIP lounge, ticket counters and the membership centre.
Nominated electrical subcontractor for the restoration of the church and its annexe blocks. The scope grew from one annexe to the whole site.
Monthly inspection and maintenance of EV chargers in Woodlands, with an inspection report signed by our LEW.
Electrical works for two 18-storey and two 5-storey residential blocks, a basement car park, pool and communal facilities.
Electrical installation for 55 landed homes in Ang Mo Kio, each with its own EV charger.
10 featured projects · swipe to see more
| Period | Project & scope | Client | Sector |
|---|---|---|---|
| 2026 – Live | Cairnhill Plaza, Blocks 53 & 55New main switchboards, ACBs and protection relays; 12 sub-main cable circuits to unit risers; underground cable trench | MCST 409 | Commercial |
| 2025 – Live | Luxus Hill condominiumElectrical installation and testing for 161 units (Phase 11) | Lim Wen Heng Construction / Mal-Sin Engineering | Residential |
| Now Live | Elective Care Centre, SGH CampusElectrical and ELV works, 4th and 18th storeys | Ngee Cheng Electric | Healthcare |
| 2026 – Live | Mandai Entrance PortalLightning protection and earthing system, with test reports and as-built records to BCA requirements | Dignity Builder | Attractions |
| 2026 | Mandai Wildlife Reserve, VIP loungeElectrical works for the VIP lounge, ticket counters and membership centre | Mandai Wildlife Reserve | Attractions |
| 2025 – 2026 | Mandai Wildlife Reserve, restaurantsElectrical works for park restaurants | Mandai Wildlife Reserve | Attractions |
| Completed | Lentor Modern, Residential Block 3Electrical installation, delivered with our own crew | Sunbeam M&E | Residential |
| 2020 – 2024 | Church of Our Lady of LourdesNominated subcontract, restoration of the church and 2- and 3-storey annexe blocks | Shanghai Chong Kee / SWC Builder | Heritage |
| 2025 | Bishan Depot, Rolling Stock WorkshopElectrical alterations and additions | SMRT Trains | Rail |
| 2020 – 2026 | SMRT lightning protection maintenancePreventive and corrective maintenance of lightning protection systems at stations, depots and viaducts on the North–South & East–West Lines, Circle Line and Bukit Panjang LRT | SMRT Trains | Rail |
| 2020 – 2023 | Antares Condominium, Mattar RoadTwo 18-storey and two 5-storey blocks, basement car park and facilities | CNS Electrical | Residential |
| 2021 – 2023 | 23 Toh Tuck Crescent3-storey corner terrace house with attic | ADT Builder | Residential |
| 2022 – 2023 | Motor workshop, Defu South Street 1Full electrical installation | Kan Fook Sing Motor Workshop | Industrial |
| 2022 – | Wave 9 workshop, WoodlandsMonthly inspection and maintenance of EV chargers, with LEW inspection reports | Strides Automotive Services | Industrial |
| 2020 – 2022 | Bukit 828 CondominiumElectrical, security system and temporary power for a 6-storey development with mechanised car park | Lim Wen Heng Construction | Residential |
| 2019 – 2022 | Tiong Bahru MRT StationFire alarm control and signal cabling for fire shutters | Gennal Industries | Rail |
| 2019 – 2021 | Jurong PortDigital kWh smart meters and data loggers | Anacle Systems | Utilities |
| 2019 – 2020 | HDB Blocks 456–476, Teck GheeSmart power and water meter installation | Anacle Systems | Utilities |
| 2016 – 2020 | Outram Community HospitalElectrical works on levels 8 and 13 of the 19-storey hospital | Ngee Cheng Electric | Healthcare |
| 2019 | NUS I4 buildingElectrical installation, levels 4 to 6 | Ngee Cheng Electric | Education |
| 2017 – 2019 | Nim Collection, Ang Mo Kio55 landed units, each with its own EV charger | CNS Electrical | Residential |
| 2014 – 2018 | Sembawang Sky ParkElectrical works for the residential condominium | CNS Electrical | Residential |
| 2017 – 2018 | Toa Payoh MRT StationReplacement of LV switchboard tie breakers for new main cable | SMRT Trains | Rail |
| 2017 – 2018 | MRT & LRT stationsInstallation and commissioning of electrical services at various stations | SMRT Trains | Rail |
| 2018 | Turbo Print, Changi South Street 1Electrical installation for a waste paper collector blower and compressor | Turbo Print | Industrial |
| 2018 | Tuas West DepotDesign, supply and install 4-pole isolator and sub-main cabling for the motor test stand | SMRT Trains | Rail |
| 2016 – 2017 | JTC Space @ Tuas, Block 4Multi-user industrial factory with worker dormitory | Kurihara Kogyo | Industrial |
| 2016 – 2017 | Lorong K Telok Kurau30-unit residential apartment | Lim Wen Heng Construction | Residential |
| 2014 – 2016 | Spottiswoode 1836-storey condominium, 251 units, with community facilities | Lim Wen Heng Construction | Residential |
| 2016 | Sembawang Parc Life ECFour 15-storey blocks, 148 units, carpark and facilities | CNS Electrical | Residential |
| 2015 – 2016 | Park Villa Rise, HougangResidential apartment electrical installation | CNS Electrical | Residential |
| 2015 – 2016 | HDB car parks, Hougang, Serangoon & Ang Mo KioElectrical works for the electronic parking system | Techelm Technologies | Utilities |
| 2015 – 2016 | Kallang, Aljunied & Paya Lebar MRTReplacement of escalator void lighting | SMRT Trains | Rail |
| 2014 – | Regis MansionsServicing and maintenance | MCST 2334 | MCST |
| 2012 – | Evershine Century Complex, Beach RoadServicing and maintenance | MCST 860 | MCST |
| 2014 | Holland Grove DriveElectrical works for two bungalows | Liverland Investment | Residential |
| Earlier project | Changi Airport, SIA–Rolls-Royce joint ventureElectrical works | — | Commercial |
| Earlier project | West Way shopping mallElectrical works | — | Commercial |
| Earlier project | Temasek PolytechnicElectrical works | — | Education |
| Earlier project | Singapore PolytechnicElectrical works | — | Education |
| Earlier project | Mount Imbiah, SentosaElectrical works for restaurants and tourist attractions | — | Attractions |
| Earlier project | Keyaki RestaurantElectrical works | — | Commercial |
| Earlier project | Newton EdgeElectrical works for the condominium | — | Residential |
| Earlier project | Costa Del SolElectrical works for the condominium | — | Residential |
Teong Hien Sing founded Seng Soon in 1971 and is still our Managing Director. Our sites are led by supervisors who have been with us for more than a decade, and the longest-serving joined in 1992.
Clients deal directly with the decision-maker, from tender to handover.
From a single switchboard to a whole condominium, every site is led by our own supervisor.
Big firms hire graduates into one narrow role. In a team our size you see the whole job, from cable tray to final claim, and you learn it from the people running it. The goal is for you to become a Licensed Electrical Worker.
Installation, testing and commissioning on live projects: condominiums, healthcare facilities, commercial buildings and rail sites.
Progress claims, drawings, coordination with main contractors and consultants, and how jobs are priced, alongside the Managing Director.
Work towards the EMA Electrical Technician licence, which lets you take charge of installations up to 500 kVA. If you perform well, we pay for your first attempt at the EN033 course and the licence application, and give you the practical experience it requires. Your first three years follow a development plan, with salary reviews at key milestones.
Kampong Ubi office and project sites islandwide · Fresh graduates welcome
Applications open soon. To be the first to hear, email your CV to admin@sengsoon.com.sg
Subject: “Assistant Engineer”
Experienced electricians and site supervisors are welcome to write in too.
Quick answers for building managers, contractors and owners looking for an electrical contractor in Singapore.
Yes. Our in-house Licensed Electrical Worker can act as the LEW for your installation, handle the application or annual renewal, and carry out the required inspection and testing. Non-domestic installations above 45 kVA need this licence, and renewals should be filed at least a month before expiry.
It depends on the premises. EMA requires condominiums and multi-tenanted buildings to be inspected at least once every six months, construction sites at least once a month, and most other licensed installations at least once a year. As your appointed LEW, we schedule and carry out these inspections for you.
Usually one night or one day, depending on the property. Residential shutdowns are scheduled on weekdays, and commercial buildings are usually done over a weekend. We can arrange a temporary generator if you need power kept on during the changeover.
Yes, for clients on a servicing contract, during office hours (Monday to Friday, 10am to 6pm).
Yes. Once you have bought your chargers, we install them, from cabling to connection, and our in-house Licensed Electrical Worker tests and certifies the installation. We do not supply the chargers ourselves.
Yes. We are registered with the Building and Construction Authority under workhead ME05 (Electrical Engineering) at grade L1, certified bizSAFE Star, ISO 9001:2015 and ISO 45001:2018, and have been an SMRT registered contractor since 1998.
Yes. We contract directly with management corporations for switchboard upgrades and other common-area works, and we have held servicing contracts with some MCSTs for more than ten years.
We take on everything from repairs, servicing and licence renewals to multi-million-dollar installations, anywhere in Singapore. Our largest single contract was $6 million. Most of our new-build work is as the electrical subcontractor to a main contractor or M&E firm, and we partner with other contractors on the largest developments. Every site is led by one of our own supervisors.
Tell us about the site, the scope and your timeline. Drawings, single-line diagrams or photos of the existing installation help us quote faster.
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Outside office hours, email us and we will reply the next working day. Our office number has been the same since at least 1992. Company BizFile and our full track record list are available on request.
