You've been handed the office renovation project, and probably discovering it's more complex than it first appeared.
Quotes vary wildly. Contractors list items as "borne by client" without explaining what that means. And everyone seems to have a different answer to "how much will this cost?"
This guide cuts through the confusion with realistic cost ranges, what's typically excluded, and the details that often surprise tenants midway through a project.
What does office renovation actually cost?
Cost Explainer
Cost per square foot
$130 – $160
For a 3,000 sqft office: $390,000 – $480,000
Not included
Basic
Good
Enhanced
Best-in-class
These ranges include furniture. Reusing existing desks and chairs? Knock 15-20% off.
Quick guide to the levels:
Essentials & Basic — Functional and clean. Good for back-office or budget-conscious teams.
Average — Where most offices land. Decent finishes, some glass, mid-range furniture.
What's typically notincluded the renovation quote: Building-mandated fees, IT infrastructure, moving costs, and potentially a harmonic filter. We'll cover these later — but budget an extra $15,000–50,000 beyond your contractor's number.
Renovation quotes typically include a 20-30% margin above direct costs. This covers design time, project management, subcontractor coordination, contingency, and business overheads.
What is open for negotiation
More design iterations
Material specifications (value engineering)
Timeline flexibility (rush jobs cost more)
Scope adjustments
Firm's profit margin
What's generally not negotiable
Labour costs (fairly fixed in Singapore)
Compliance requirements
Building-mandated fees
Finding the right balance
A profit margin of around 15-18% allows the contractor to deliver quality work while remaining competitive. Significantly below this, something has to give — often in areas you can't see like materials, workmanship, or responsiveness when issues arise.
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Same budget, different outcomes
Two firms quoting the same price won't deliver the same result. The difference is in their team and processes — fewer mistakes, less rework, smoother coordination.
When comparing quotes, ask who you'll actually be working with. Your Designer and Technical Lead matter more than the firm's portfolio.
the 2 people that matter most
1. Designer — More than Aesthetics
A good designer plans spatial layouts efficiently — architect-trained designers often excel here.
They understand materials and their cost implications, and practice value engineering to balance design vision with budget.
2. Technical Lead — Problem-solver
Ensures design is actually buildable. Checks for functional durability and identifies potential execution issues before construction begins.
In smaller firms, this role may be combined with the Project Manager.
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Building-mandated costs
These sit outside your contractor's quote. Budget $15,000–50,000 depending on building and scope.
Qualified Persons (QPs)
Most Grade A buildings require you to use their approved panel of architects, engineers, and fire safety consultants for submissions. You can't shop around — and you pay their rates.
One thing most people don't know: this requirement is stricter in newer buildings that haven't received their Certificate of Statutory Completion (CSC). Ask your landlord about the building's CSC status before signing your lease.
Additional Fees that add up
In most quotations, here's what gets marked "Borne By Client":
Fit-out deposit: $5,000–$10,000 (refundable)
Sprinkler drainage/recharge: $300–$600 per floor, per occasion
M&E vetting by base consultant
Building LEW (Licensed Electrical Worker)
Management attendance fee
Temporary power and water during renovation
Your contractor can estimate these based on experience with your building. Ask for ranges upfront.
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Harmonic Filters — the $10,000 surprise nobody mentions
This is one of the most commonly missed costs in office renovation budgeting.
Here's a scenario that plays out regularly in Grade A buildings:
Your renovation is complete. Equipment is installed. You're ready to move in. Then building management says you need to pass a harmonic test before they'll sign off.
You fail. Now you need a harmonic filter — $10,000 — and your move-in date just slipped by 2-3 weeks.
What's actually happening?
Modern office equipment — computers, LED lighting, UPS systems, monitors — generates electrical noise that affects building power quality. Grade A buildings test for this before issuing occupancy clearance.
Here's the reality — most offices fail the harmonic test.
A typical setup with computers at every desk and LED lighting throughout will exceed the building's limits. The test happens after your equipment is installed, so you won't know for certain until then — but assume you'll need a filter.
The practical advice:
Active harmonic filter: $10,000–$20,000 (supply and install)
Passive filters won't be accepted if you have a UPS
Don't treat this as a contingency. Treat it as a line item.
The technical bit (for those who want it):
Grade A buildings typically require compliance with IEEE 519 standards:
Voltage distortion: must not exceed 5%
Current distortion: must not exceed 12%
Power factor: must be 0.85 or better
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Functional costs that add up
These aren't aesthetic upgrades — they're operational requirements that drive real cost:
Item
Cost
Why
Server room
$15,000–$50,000+
Dedicated cooling, power redundancy, fire suppression
Phone booths
$3,000–$8,000 each
Private calls and focus work
Acoustic partitions (double-glazed)
$80–150 PSF
Actual privacy in meeting rooms
Raised access flooring
$15–25 PSF
Flexible cabling, common in tech offices
24/7 aircon
$5,000–$15,000
Separate connection for after-hours cooling
UPS / power redundancy
$10,000–$30,000+
Operations that can't tolerate outages
When briefing your contractor, separate functional requirements from nice-to-haves. Functional needs aren't negotiable — know what they'll cost before you finalise your budget.
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Other details that catch people
Document the space before touching it — Buildings require a pre-fit-out condition survey. Any damage discovered later that wasn't recorded? It is assumed to be your fault. Don't skip this.
Cancellation costs 20% — If you sign a contract then pull out, expect a 20% penalty of the total contract sum. Be certain before you commit.
High electrical loads need separate metering — Server rooms or equipment exceeding 50 kVA require dedicated sub-meters linked to the building's system. Extra cost, extra coordination.
Plan for your exit too — Reinstatement costs $16–25 PSF when you leave. Decisions you make now affect what you'll pay later. Read the reinstatement guide.
Kenneth Poh created RightSpace after serving as CEO of a Design & Build firm. This guide draws from real projects, real budgets, and practical insights gained from working with contractors and clients across Singapore's commercial office market.
FAQs
How much does it cost to renovate a 3,000 sqft office?
At average quality ($130–160 PSF), expect $390,000–$480,000 including furniture. Add $15,000–$50,000 for Grade A building-mandated costs outside your contractor's quote.
What's not included in office renovation quotes?
Building QP fees, fit-out deposit, sprinkler drainage fees, harmonic filter, IT cabling, moving costs. Always ask what's marked "Borne By Client" or "Paid by Client".
Do I need a harmonic filter?
Likely. Most modern offices with computers, LED lighting, and UPS systems fail the building's electrical test. Budget $10,000–$20,000.
How do I negotiate renovation costs?
Negotiate on design iterations, materials, scope, timeline, and the firm's profit margin. Labour rates and building-mandated fees are fixed. Rushing the job costs 15–25% more.
A margin around 15–18% lets your contractor deliver quality work while staying competitive. Push much lower, and corners are cut where you can't see — usually materials, manpower, or responsiveness when problems arise.
What should I ask the D&B firm before signing?
How many design revisions are included? What's in the contingency? Are QP fees included? Have you worked in this building before? Who're my Designer and Technical Lead?
Will the landlord contribute anything?
Most offer 1–2 months rent-free for fit-out. Worth negotiating, especially on longer leases.
What happens when I leave?
Reinstatement. You'll pay $16–25 PSF to strip the space back to its original condition. Design decisions now affect what you'll pay later. Read our reinstatement guide.