How To Reduce Energy Consumption In A Building: 10 Key Points

Energy bills are one of the largest recurring costs in any managed property. In Singapore, common property electricity consumption covers lifts, ACMV systems, corridors, carparks, water pumps, and security lighting, and can account for 30 to 50 per cent of a condominium's annual maintenance fund expenditure.

Understanding how to reduce energy consumption in a building is not just an environmental exercise. It has a direct, measurable impact on your maintenance fees, and the long-term value of the estate.

Why Energy Efficiency Matters for Singapore's Built Environment

The most immediate reason to reduce energy consumption in a building is cost. A typical mid-size condominium in Singapore spends between SGD 300,000 and SGD 600,000 per year on utilities for common property. A 15 to 20 per cent reduction can generate SGD 45,000 to SGD 120,000 in annual savings by increasing maintenance contributions.

Singapore's Building and Construction Authority (BCA) has progressively tightened energy standards through the Green Mark Scheme. Properties that proactively reduce consumption are better positioned for upcoming regulatory changes and for attracting quality residents. 

Understanding what goes into an energy efficient building starts with identifying the systems driving the highest consumption in your specific estate.

1. Conduct an Energy Audit First

Before committing any capital to energy reduction upgrades, commission a professional energy audit. An audit identifies which systems consume the most electricity, flags operating inefficiencies, and ranks improvement measures by their return on investment.

In Singapore, the NEA and BCA have support programmes for energy audits in residential and commercial buildings. A licensed energy auditor will map your baseline consumption and produce a prioritised action plan with estimated payback periods for each measure. Without this baseline, estates often invest in the wrong improvements and see minimal impact on their energy bills.

2. Upgrade Lighting to LED with Occupancy Controls

Replacing conventional fluorescent or incandescent lighting with LED across all common areas is typically the single highest-return energy upgrade for a condominium. LED lighting uses 50 to 70 per cent less electricity than fluorescent tubes and lasts three to five times longer, reducing both energy spend and replacement maintenance costs.

Corridors, carparks, lobbies, and stairwells are the highest-priority areas. Adding occupancy sensors and daylight harvesting controls to LED systems can cut energy use by a further 20 to 40 per cent in frequently unoccupied spaces.

3. Optimise Your ACMV Systems

Air-conditioning and mechanical ventilation (ACMV) is typically the largest consumer of electricity in commercial and mixed-use properties, and the second largest in residential condominiums. Regular servicing of air handling units, cooling towers, and chiller plants is essential to maintain efficiency.

Dirty filters and fouled coils force systems to work harder for the same cooling output. 

Replacing older chiller plants with high-efficiency units targeting a coefficient of performance (COP) of 5.0 or above can deliver 20 to 35 per cent savings on ACMV-related consumption. Installing occupancy sensors in function rooms and gyms to disable ACMV when spaces are unoccupied is a low-cost improvement with a short payback period.

4. Install a Building Management System

A Building Management System (BMS) gives the managing agent and facilities team real-time monitoring and control of all major building services, including ACMV, lighting, lifts, and water systems. A BMS enables scheduling of systems to run only when needed, real-time anomaly detection, and consumption reports that support data-driven decisions.

For estates exploring smart building solutions, a BMS is the operational backbone that makes other technology investments work effectively. In estates without a BMS, even basic sub-metering of individual systems provides the baseline data needed for meaningful energy management.

5. Improve Your Building Envelope

In Singapore's tropical climate, the building envelope (roof, walls, and glazing) has a significant impact on the cooling load placed on ACMV systems. Reducing heat gain through the building fabric directly reduces electricity demand for cooling.

Applying reflective roof coatings or installing a green roof reduces heat gain through the roof structure. For buildings with large glass facades, solar control window film reduces solar heat gain without significantly reducing natural light. Both represent a one-time investment with long-term operational savings. Estates may qualify for support under the BCA Green Mark Incentive Scheme for Existing Buildings 2.0 (GMIS-EB 2.0), which is available until March 2027. Eligibility depends on the specific scope of works and your building's gross floor area. Your managing agent can check eligibility and coordinate the application on the MCST's behalf.

6. Upgrade to Energy-Efficient Lifts

Lifts account for a significant share of common property electricity consumption, particularly in high-rise developments. Older motor-generator lift systems consume 30 to 40 per cent more electricity than modern Variable Voltage Variable Frequency (VVVF) systems.

If your estate's lifts are more than 15 years old, a lift replacement or major upgrade should be assessed on both energy and safety grounds. VVVF drives, regenerative braking systems that return energy to the building's electrical network, and LED cabin lighting together deliver meaningful reductions in lift energy use.

7. Manage Pool and Water Heating Energy

Water heating for club facilities, gyms, and changing rooms can be a meaningful but often overlooked energy cost in lifestyle condominiums.

Heat pumps are a good alternative to conventional electric heaters. Unlike systems that generate heat directly, heat pumps move heat from the surrounding air, making them two to three times more efficient than conventional electric heaters in terms of electricity consumption. For facilities that require air-conditioning, such as function rooms, gyms, and indoor courts, occupancy sensors and scheduled operating hours prevent systems from running in empty spaces, delivering consistent savings without affecting resident experience.

8. Tap on Singapore's Green Grants and Incentive Schemes

Several government programmes in Singapore help buildings fund energy efficiency upgrades. The Energy Efficiency Fund (E2F), managed by NEA, co-funds up to 50 per cent of qualifying energy-efficient equipment costs for eligible buildings.

The Electric Vehicle Common Charger Grant (ECCG) covers EV charging infrastructure, which increasingly includes smart load management features that help estates manage overall electricity demand. Your managing agent should be familiar with these programmes and capable of coordinating grant applications on the MCST's behalf.

9. Engage Residents in Energy Reduction

Technical upgrades address baseline consumption, but resident behaviour accounts for a meaningful share of energy use in any managed development. A simple programme of quarterly resident communications can achieve 5 to 10 per cent additional savings without capital expenditure.

Practical guidance covering practices such as setting air-conditioning to a minimum of 25 degrees Celsius, reporting faulty lighting or equipment promptly, and not propping open common area doors makes a real difference over time. 

For mixed-use developments, tenant energy clauses in lease agreements and periodic energy briefings create accountability structures that support building-wide performance.

10. Work With a Managing Agent Who Prioritises Energy Management

The difference between an estate where energy costs are controlled and one where they spiral uncontrolled often comes down to the quality and diligence of the managing agent. 

A managing agent who tracks utility consumption monthly, flags anomalies in real time, enforces preventive maintenance schedules, and coordinates grant applications systematically will consistently achieve better energy outcomes.

Conclusion On Energy Consumption In A Building

When choosing the right managing agent for your estate, energy management capability should be one of the key criteria you assess.

At Abacus Property, energy management is embedded into our standard operating procedures. We track consumption data across all managed estates, benchmark performance against comparable developments, and bring capital upgrade recommendations to councils before costs become problems.

If you would like to understand how your estate's energy use compares to similar developments, or explore which upgrades offer the best return, get in touch with us.

Frequently Asked Questions About Reducing Energy Consumption in a Building

What Is The Most Effective Way To Reduce Energy Consumption In A Building? 

The most effective approach is to start with a professional energy audit, then prioritise LED lighting upgrades and ACMV servicing or replacement. These two areas typically address 60 to 80 per cent of common property electricity consumption in Singapore condominiums.

How Much Can A Singapore Condominium Save By Reducing Energy Consumption? 

A condominium implementing LED upgrades, ACMV servicing, and BMS controls can typically reduce energy-related costs by 15 to 30 per cent. For a development spending SGD 400,000 per year on utilities, that represents SGD 60,000 to SGD 120,000 in annual savings.

Does Singapore Offer Grants For Building Energy Efficiency Upgrades? 

Yes. The NEA administers the Energy Efficiency Fund (E2F), which co-funds up to 50 per cent of qualifying energy-efficient equipment costs for eligible buildings. BCA also provides support under the Green Mark Incentive Scheme. Your managing agent can identify applicable programmes and coordinate applications on behalf of the MCST.

How Does Roof Insulation Reduce Energy Consumption In A Building? 

In Singapore's tropical climate, solar heat gain through the roof significantly increases the cooling load on air-conditioning systems. Applying reflective roof coatings or green roofs can reduce this heat gain by 20 to 30 per cent, which translates directly into lower ACMV energy consumption.

Can Upgrading Old Lifts Meaningfully Reduce Energy Consumption? 

Yes. Older motor-generator lift systems consume 30 to 40 per cent more electricity than modern VVVF drives with regenerative braking. In a high-rise condominium with multiple lifts running continuously, upgrading to modern lift systems can generate significant annual energy savings.