1. Civil and Structure
RAB for preparatory work, earthwork, foundations, concrete, reinforcement, formwork, and steel structure, with volumes calculated from structural drawings.
Introduction
What Is a RAB (Cost Estimate) Consultant?
A Cost Estimate (Rencana Anggaran Biaya, RAB) is the estimated cost required to complete a construction job, calculated from the volume of each work item multiplied by its unit price. A RAB consultant is a service provider who prepares this calculation in detail, systematically, and accountably, so the project owner has a realistic investment figure before construction begins.
JULIZAR has more than 6 years of experience preparing cost estimates across many construction fields throughout Indonesia. We prepare accurate and detailed cost estimates for housing, multi-storey buildings, hospitals, hotels, and apartments, covering civil, architectural, and MEEP (mechanical, electrical, electronic, and plumbing) work based on technical drawings.
A well-prepared RAB is more than a total figure. The document becomes the basis for the investment budget, bank financing applications, tender documents, comparison of contractor bids, and cost control reference during implementation. An accurate RAB service therefore largely determines the financial feasibility of a property project.
When you need us
What Is a RAB Used For?
A detailed cost estimate is needed at various project stages, including for:
- Preparing the investment budget and feasibility study of property projects
- The basis for construction credit or financing applications to banks and investors
- Preparing tender documents and the Owner Estimate (OE)
- Comparing contractor bids so prices are fair and transparent
- Contract reference, progress payments, and work progress valuation
- Cost control and assessment of work changes (variation orders)
For both new projects and renovations, a detailed RAB helps owners make data-based decisions before funds are spent. With a RAB consultant, the risk of a budget that is too low or too high can be reduced from the start.
RAB scope
Three Work Disciplines in RAB Preparation
JULIZAR estimators calculate costs by discipline so every part of the building can be traced and checked.
2. Architecture
RAB for walls, floors, ceilings, doors and windows, roofing, facades, and finishing work according to the selected material specifications.
3. MEEP
RAB for mechanical, electrical, electronic, and plumbing: air conditioning, electrical panels and installations, data and security systems, clean water, and wastewater.
4. Recapitulation
Cost recapitulation by discipline, overhead and profit, and taxes in a format easy for owners, banks, and tender teams to read.
Services
JULIZAR RAB Consulting Services
The scope of our RAB services is tailored to the building type, project scale, and the purpose of the budget document.
Multi-Storey Building RAB Services
Preparing RAB for office and multi-storey buildings from structural and architectural work to MEEP based on technical drawings.
Apartment RAB
Apartment construction cost estimates: towers, podium, basement, residential units, and shared facilities for the developer's investment budget.
Hotel RAB
Hotel and resort cost estimates covering rooms, public areas, interiors, and complex building systems.
Hospital RAB
Cost calculation for hospitals and healthcare facilities with a large share of MEEP work and special installations.
Housing and Residential Estate RAB
Housing cost estimates: house types, estate infrastructure, roads, drainage, and public facilities.
MEEP Work RAB
Mechanical, electrical, electronic, and plumbing cost estimates calculated per system and per floor.
Volume Take-Off and BoQ
Work volume calculation from drawings and preparation of a detailed Bill of Quantities (BoQ) that is easy to check.
Unit Price Analysis (AHSP)
AHSP preparation based on labor, material, and equipment coefficients that follow prevailing regulations.
Material Price Survey and Update
Updating material unit prices and wages to the project location so the RAB reflects current market conditions.
Owner Estimate (OE) for Tender
Preparing the owner's cost estimate as a reference for tender documents and contractor bid evaluation.
Contractor RAB Review
Checking the reasonableness of volumes and prices in a contractor's bid or RAB before the contract is agreed.
Renovation and Redevelopment RAB
Cost estimates for renovation, extension, and reconstruction of existing buildings, including demolition work.
Need a RAB consultant for your project?
Send technical drawings or a project summary. We will send a RAB service quotation and time estimate.
Benefits
Benefits of Using a RAB Consultant
With a RAB consultant, owners get an investment figure that can be accounted for. Every work item has a clear volume, unit price, and assumptions, so discussions with contractors, banks, and investors run on data, not rough guesses.
A detailed RAB also helps prevent cost overruns. Missed work items, material prices that do not fit the location, or design changes whose impact has not been calculated can be found before the contract is signed. As a result, apartment, hotel, hospital, and housing projects can run on a realistic budget.
Our process is oriented toward accurate and fast results, for both volumes and unit prices, and is carried out by estimators experienced in RAB estimation.
Clients
Who Uses RAB Services?
- Project owners who need a realistic cost budget
- Property developers: apartments, hotels, and housing
- Hospitals and healthcare facilities
- State-owned enterprises and agencies preparing budgets and Owner Estimates
- Contractors who need a comparison estimator or tender support
- Investors and financing institutions validating project budgets
Process
Work Stages of a RAB Consultant
A structured workflow makes RAB results easy to check and update when the design changes.
Brief
Scope, building type, and RAB purpose.
Drawing data
Technical drawings and specifications are checked.
Take-off and BoQ
Work volumes are calculated per item.
AHSP and prices
Unit prices are adjusted to the location.
Recap and handover
The RAB document is reviewed and handed over.
Start with a short brief
Send a project summary, location, and available drawings. The first consultation is free, no obligation.
Calculation
How Is a Cost Estimate Calculated?
In principle, RAB is calculated by multiplying the volume of each work item by its unit price, then summing all items and adding overhead, profit, and taxes.
RAB = Σ (Work Volume × Work Unit Price)
Work volume is obtained from the quantity take-off process on technical drawings. Work unit price is obtained from Unit Price Analysis (AHSP), which calculates labor, material, and equipment coefficients for each unit of work, then adjusts them to wages and material prices at the project location.
With this method, every figure in the RAB can be traced back to drawings and price analysis, so owners, banks, and contractors can check and discuss it openly.
Cost factors
What Affects the RAB Value?
- Building area and number of floors, including basements
- Complexity of structural and facade design
- Material specifications and finishing level
- Scope and complexity of MEEP systems
- Project location and local material and wage prices
- Implementation method and duration
- Completeness and detail of technical drawings
Risks
Common RAB Preparation Mistakes We Avoid
Small errors at the estimation stage can have a large effect on final project cost.
Incomplete drawings
A RAB from drawings that are not final changes easily. We note assumptions clearly and flag items that need confirmation.
Unit prices not updated
Material and wage prices differ in each region. We update prices to the location so the RAB is close to market conditions.
Missed work items
MEEP and supporting work are often missed. We check completeness per discipline and per floor.
Without a recheck
Every RAB goes through a review of volume and price reasonableness before it is handed to the owner.
Comparison
RAB Consultant, Quantity Surveyor, Construction Management, or Feasibility Study?
Each service answers a different project need and they can be combined.
| Services | Focus | Result |
|---|---|---|
| Cost Estimate (RAB) | Construction work cost estimate from technical drawings | A realistic investment budget |
| Quantity Surveyor | Volumes, BoQ, tender, and contract cost control | Controlled costs and a transparent tender |
| Construction Management | Supervision of quality, time, and cost on site | The project is completed to specification and handed over |
| Feasibility Study | Market, technical, and financial analysis of the project | A measured investment decision |
Advantages
Why Choose JULIZAR as Your RAB Consultant?
| Status | Advantages | Explanation |
|---|---|---|
| Experienced estimators | carried out by estimators in the field of RAB estimation | |
| Accurate and fast | work volumes and unit prices calculated with precise results | |
| AHSP per regulation | unit price analysis follows prevailing regulations | |
| Competitive pricing | service quotation matched to project scope and scale | |
| Direct communication | via WhatsApp and meetings in South Tangerang |
Investment
How Much Does a RAB Consultant Cost?
Fees depend on building area and type, the scope of work disciplines (civil, architectural, MEEP), level of detail, and completion schedule.
We provide a quotation after the initial brief. The first consultation is free.
RAB fees are relatively small compared with project value, but the impact is large: an accurate budget helps owners negotiate with contractors, apply for financing, and avoid running out of funds mid-construction.
Related services
Other Services Often Used Together With RAB Consultants
Quantity Surveyor for BoQ and contract cost controlConstruction Management for project supervisionA Feasibility Study before the project startsBuilding audit to assess building conditionPBG and SLF for building legalityHighest and Best Use to determine asset functionWeb design for your business and company profile website
Want to see our experience?
View the JULIZAR project portfolio or discuss your RAB needs directly.
FAQ
Questions About RAB Consultants
Still have questions?
Ask our team directly.
What is a RAB consultant?
A RAB consultant is a service provider who prepares a construction project's Cost Estimate in detail based on technical drawings, specifications, work volumes, and unit price analysis, so the project owner has a realistic cost estimate before construction begins.
What is RAB and what is it for?
RAB, or Cost Estimate (Rencana Anggaran Biaya), is the estimated cost of completing construction work, calculated from the volume of each work item multiplied by its unit price. RAB serves as the basis for the investment budget, financing applications, tender documents, comparison of contractor bids, and project cost control reference.
What is included in a RAB?
RAB covers preparatory work, civil and structure, architecture, and MEEP (mechanical, electrical, electronic, and plumbing), plus overhead, profit, and taxes. The scope can be adjusted to your needs and the completeness of project drawings.
What documents are needed to prepare a RAB?
Generally architectural, structural, and MEP technical drawings, technical specifications, project location information, and material quality targets. If drawings are incomplete, we help identify missing data and set clear assumptions.
How long does it take to prepare a RAB?
Duration depends on building area, number of floors, design complexity, the scope of work disciplines, and the completeness of drawings. We give a time estimate once the drawings and project brief are received.
How much does a RAB consultant cost?
Fees depend on building area and type, the scope of work disciplines (civil, architectural, MEEP), level of detail, and completion schedule. We provide a quotation after the initial brief, and the first consultation is free.
What is AHSP in RAB preparation?
AHSP, or Work Unit Price Analysis (Analisa Harga Satuan Pekerjaan), is the calculation of the price per unit of work consisting of labor, material, and equipment requirements. We prepare AHSP following prevailing regulations and adjust prices to the project location.
What is the difference between RAB and BoQ?
A BoQ (Bill of Quantities) is a list of work items with their volumes. RAB adds a unit price to each item to produce a cost value, then recapitulates it into the total project budget.
What is the difference between a RAB consultant and a Quantity Surveyor?
A RAB consultant focuses on preparing construction work cost estimates before the project runs. A Quantity Surveyor has a broader scope, such as BoQ, tender documents, work progress valuation, and contract cost control during implementation. The two are often used together.
What projects can have a RAB prepared?
Housing, multi-storey buildings, hospitals, hotels, apartments, commercial and industrial buildings, as well as renovation and redevelopment of buildings owned by private companies, state-owned enterprises, and agencies across Indonesia.
Ready to Prepare Your Project RAB With a RAB Consultant?
Join the business owners and companies who trust JULIZAR for Cost Estimate preparation. Sorry, we do not take voice calls; please leave a message.
PT Julizar Konsultan Indonesia, Roseville SOHO & SUITE, Sunburst CBD, Jl. Kapten Soebijanto Djojohadikusumo No.8 Lot I, Suite S-1009, Lengkong Gudang, South Tangerang, Banten 15321Need Help?
Discuss your project with us now. Free initial consultation.
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