Electrical and Instrumentation Cost Estimation & Quantity Surveying
We provide specialist Electrical and Instrumentation (E&I) quantity surveying and cost estimating for complex industrial, mining, process plant and energy distribution projects. Our team combines first‑principles estimating with hands-on experience to give you accurate, defendable numbers for new builds, brownfield upgrades and shutdown scopes.
From substations and MCC rooms to field instrumentation, control systems and extensive cable networks, we focus on the parts of your project where electrical and instrumentation scope, access and interfaces can quickly drive cost and schedule risk. Whether you are building a new facility or expanding an existing one, our estimates help you understand what the E&I work will really take to deliver.
- Cost‑accurate E&I quantity surveying and estimating for industrial plants, mines, substations and distribution networks.
- First‑principles rates based on real projects, site conditions, labour productivity and current material pricing rather than generic allowances.
- Support for CAPEX budgets, EPC bids and shutdown works so your electrical and instrumentation scope is priced realistically from concept to contract award.
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
Specialised cost estimating for electrical and instrumentation works
We provide specialised cost planning, estimating and scheduling support for Electrical and Instrumentation (E&I) scopes on complex industrial, mining and process plant projects. Our focus is on the systems that keep your operations powered, controlled and monitored – from LV/MV/HV distribution through to field instruments and control rooms – so your CAPEX budgets and bids reflect the real effort involved in installing and commissioning them.
We work across industrial process plants, mining and resources, power generation and distribution, and, where relevant, oil and gas facilities and terminals. That includes greenfield plants, brownfield expansions and shutdown campaigns, where access, congestion and tie‑ins can significantly affect electrical and instrumentation productivity and cost. Our team understands cable systems, switchgear, MCCs, control systems, field instruments, trays and containment, terminations, testing and commissioning, and we build our estimates around those realities rather than generic allowances.
Typical E&I work packages we estimate include:
- Power and control cabling (LV/MV/HV), including terminations and glanding.
- Cable ladders, trays, conduits and other containment systems above and below ground.
- Switchrooms, substations, MCCs, distribution boards and transformers.
- PLC, DCS and SCADA panels, marshalling cabinets and control room equipment.
- Field instrumentation, junction boxes, analyzers and associated tubing and wiring.
- Earthing and bonding systems, lightning protection and related works.
- Lighting and small power, emergency and exit lighting, and associated controls.
Who we support on electrical and instrumentation projects
We support organisations that design, build and operate complex, E&I‑heavy industrial assets, where accurate electrical and instrumentation costs are critical to safe, reliable and profitable delivery.
EPC contractors and construction contractors
EPC and construction contractors rely on robust E&I estimates to price bids competitively while protecting their margin on complex installation, testing and commissioning scopes. We help bid and project teams with detailed quantities, labour build‑ups and clarifications so electrical and instrumentation packages are costed realistically from day one.
Industrial and mining asset owners
Industrial and mining operators must plan brownfield upgrades, expansions and shutdowns around tight windows and safety‑critical electrical systems. We support asset owners with CAPEX estimates and option studies that reflect real installation constraints, helping them make better investment decisions and manage shutdown risk.
Power utilities and network businesses
Network and utility providers invest heavily in substations, distribution networks and control upgrades where E&I scope dominates project cost and risk. We provide structured estimates for LV/MV/HV equipment, cabling and control systems so planners and project managers can justify budgets and procure works with confidence.
OEMs and package vendors
OEMs and package vendors often supply equipment globally but need reliable installation cost estimates to support proposals and turnkey offers. We develop install and integration estimates for E&I scope around OEM packages, helping vendors present more complete offers and avoid costly surprises during implementation.
Consulting and design engineers
Consulting and design engineers are expected to provide not only technical solutions but also credible cost guidance during concept, FEED and detailed design. We act as an estimating partner to design teams, providing design‑stage E&I estimates, value‑engineering input and checks on contractor pricing so designs and budgets stay aligned.
Our electrical and instrumentation estimating services
Cost planning and budgeting
We develop early CAPEX estimates for project concepts, FEL/FEED studies, brownfield upgrades and shutdown scopes so you can understand E&I costs before committing to detailed engineering or procurement. These concept and design‑stage estimates are structured by system and area, making it easier to test options, build investment cases and align budgets with the level of definition at each stage.
Detailed quantity surveying and estimating
For projects moving into detailed design or execution, we provide full E&I quantity take‑offs and first‑principles estimates. This includes cable lengths by type and size, terminations and glanding, trays and ladders, distribution boards and panels, field instruments, junction boxes, marshalling cabinets, lighting, earthing and associated supports. We then apply labour norms, material pricing and construction allowances that reflect site access, heights, congestion and shutdown constraints, giving you a realistic picture of installation effort and cost.
Tender and bid support
We support EPCs, contractors and owners with the E&I components of tenders and bids, preparing pricing schedules, BOQs, labour build‑ups and productivity assumptions for electrical and instrumentation work. Our input helps clarify scope boundaries, inclusions, exclusions and assumptions so that E&I pricing is consistent across bidders and less exposed to later claims and re‑interpretation.
Construction phasing and scheduling input
Where required, we tie E&I quantities to specific areas, systems and phases to support planning and scheduling. This allows planners to understand labour loading over time, identify high‑congestion periods and sequence E&I works around mechanical, civil and process milestones more effectively.
Independent estimate and variation reviews
We review contractor and subcontractor E&I estimates, variations and change claims for completeness, reasonableness and alignment with the original scope and Basis of Estimate. By checking quantities, rates, productivity assumptions and disruption allowances, we help owners and tier‑one contractors manage commercial risk, negotiate from a stronger position and keep change orders consistent with project realities.
How We Work?
Scope and document review
We start by reviewing the engineering information that defines your electrical and instrumentation scope so we are clear on what needs to be priced. This typically includes single‑line diagrams, cable schedules, load lists, I/O lists, P&IDs, layout and lighting drawings, standards and specifications, as well as any existing estimates or basis documents. At this stage we clarify scope boundaries, interfaces and required accuracy so the estimate is built on an agreed foundation.
Quantity take‑off
Using the approved drawings and schedules, we carry out detailed quantity take‑offs for all major E&I work items. That covers cable lengths by type and size, cable tray and ladder by width and run, equipment items (panels, MCCs, transformers), instruments, junction boxes, marshalling cabinets, terminations, lighting points, small power outlets and earthing components. The result is a structured set of measured quantities that can flow directly into BOQs and cost breakdowns.
Pricing and labour build‑up
We then apply unit rates built from labour norms, material and equipment pricing, and project‑specific factors such as height, access constraints and confined spaces. Labour allowances reflect installation difficulty rather than simple linear factors, and we include preliminaries and indirect costs so the full cost of delivering the E&I scope is visible.
Estimate and BOQ delivery
Once pricing is complete, we compile the estimate into clear outputs for your team. This typically includes Bills of Quantities, cost breakdowns by area, system and work type, and a written Basis of Estimate that documents assumptions, data sources, inclusions, exclusions and identified risks. These deliverables can be used directly in budgets, tenders and internal approvals.
Ongoing support
We remain available to update your E&I estimate as designs develop, RFIs are resolved or tender conditions change. Our team can revise quantities, adjust labour factors, incorporate new vendor pricing and support responses to clarifications so your electrical and instrumentation cost information stays accurate through design, approval and procurement.
The value we add on E&I projects
- Greater certainty on E&I costs in environments where access, height and congestion have a big impact on labour productivity, helping you avoid under‑resourced installation crews and cost overruns.
- Stronger bids and budgets that price complex cable routing, terminations and commissioning scopes realistically, rather than relying on oversimplified allowances.
- Better scope clarity between mechanical, civil and E&I packages, reducing interface gaps and clashes that typically cause rework, delay and additional cost.
- Reduced disputes and variations on electrical and instrumentation components thanks to transparent quantities, documented assumptions and a clear Basis of Estimate.
Give your next electrical and instrumentation project a more reliable commercial footing by partnering with a team that lives and breathes E&I scope – request an Electrical & Instrumentation Cost Estimate today and we’ll review your single‑line diagrams, cable and I/O schedules, layouts and specifications, quantify the work in detail and come back with a clear, defendable cost breakdown you can use for CAPEX budgeting, EPC bids and shutdown planning.
Accurate E&I Cost Estimates for Industrial Projects
Need specialist Electrical & Instrumentation cost estimating for your industrial, mining or process plant projects? Straight Line Estimating delivers first-principles quantity surveying for cabling, switchgear, MCCs, control systems and field instrumentation that withstands EPC bids, CAPEX reviews and shutdown planning.
Our team turns complex single-line diagrams, cable schedules and layouts into transparent, defensible budgets within 48 hours.
Whether you’re an EPC contractor, asset owner or engineering consultant, get realistic E&I pricing that accounts for site access, congestion and commissioning realities.
Avoid cost overruns and interface disputes with detailed BOQs ready for tender submission.
Request your Electrical & Instrumentation cost estimate today – simply upload your drawings and specifications for a tailored proposal.
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