Renewable Energy
Australia, NZ, Oceania
Water and Waste Water Infrastructure
QLD, NSW, VIC, WA, SA
Substations and Transmission
NSW, WA, QLD
Electrical and Instrumentations
Australia, NZ, Oceania
Precision Cost Estimating for Australia’s Energy Transition
Straight Line Estimating is Australia’s trusted partner for precision cost estimating, quantity surveying, and contract management in renewable energy, water infrastructure, E&I, and transmission projects. We deliver first-principles estimates and complete tender packages for utility-scale solar, wind farms, BESS storage systems, and high-voltage substations—from 100kW to 100MW+ projects across Queensland, NSW, Victoria, WA, and South Australia. Our expertise ensures cost certainty and risk management for EPC contractors and developers, preventing budget overruns in complex energy transition initiatives while providing accurate budgeting, commercial advisory, and seamless contract administration for water treatment plants and critical infrastructure nationwide.
Renewable Energy
We specialise in cost planning, estimating, and contract management services for utility-scale solar, wind, microgrid, and BESS projects. No project is too small or too big for us, from 100kW to 100MW across Australia and Oceania.
Our team delivers accurate quantity take-offs, feasibility studies, and budget tracking from concept to commissioning. We support procurement and tendering, including tender package compilation, as well as contract management—while also managing risks, variations, and compliance.
Water and Waste Water Infrastructure
We provide tailored services to help our clients plan, budget, and deliver water and wastewater infrastructure that meets the needs of rapidly growing Australian cities.
We support clients with first principles estimating, value engineering, resource planning, and smart procurement to make sure every dollar is working hard. Our team assists clients in forecasting budgets, managing costs, and getting projects over the line—delivering clear, affordable water solutions without adding pressure to housing prices.
Electrical and Instrumentations
We offer Electrical and Instrumentation quantity surveying, First Principal and Tender Estimating, and Scheduling for complex industrial, mining, and energy distribution—backed by hands-on experience and a deep understanding of process systems to ensure accuracy, efficiency, and cost certainty at every stage.
Substations and Transmission
SLE is strong in Quantity surveying, and scheduling services for Substation and Transmission projects, ensuring cost-effective delivery, technical accuracy, and technical competency. We offer preparation RFQ, EOI, RFP, tender packages, tender evaluation, First Principal and tender estimation, scheduling and project controlling.
What types of renewable energy projects do you estimate?
Utility-scale solar (100kW-100MW), wind farms, BESS storage, microgrids across Australia & Oceania.
What does "first principles estimating" mean?
Breaking down every component (materials, labor, equipment) from raw data – no black box databases.
Which states do you cover for water infrastructure?
QLD, NSW, VIC, WA, SA – water treatment plants, wastewater, pipelines.
Do you handle E&I substation projects?
Yes – electrical & instrumentation quantity surveying, tender estimating, scheduling for substations/transmission.
What deliverables do clients receive?
Detailed quantity take-offs
First principles cost estimates
Complete tender packages (RFQ/EOI/RFP)
Risk registers & budget trackers
What project stages do you support?
Concept/feasibility → tendering → contract admin → variations → final accounts.
Need an Estimating Partner or short-term assistance with your project?
We create solutions, not problems!