Construction

Renovation & Alteration

Occupied-building renovation demands surgical planning. Crestmark specialises in structural alterations, tenant improvements, and full asset repositioning — completed on live sites with minimal operational disruption.

Scope of work

What we cover

  • Structural strengthening and opening formation
  • Interior fit-out and finishes
  • MEP retrofit and upgrade
  • Façade recladding and repair
  • Change-of-use conversions
Methodology

How we deliver

01
Condition audit

Structural, MEP, and finishes assessment, hazardous-materials survey, and dilapidations report.

02
Phased execution

Zoned working, temporary supports, dust and noise control, and out-of-hours schedules to protect ongoing operations.

03
Handback

Progressive commissioning per zone with a validated snag-free acceptance protocol.

FAQ

Common questions

Can you work in a fully occupied building?+
Yes. We routinely execute in operational offices, hotels, and hospitals with agreed noise/dust envelopes and out-of-hours works.
Trusted by operators, banks, and government
Saipem
Federal Ministry of Works
Nigeria Police Force
NLNG
Chevron
Dangote Group
Julius Berger
Access Bank
PZ Cussons
Meridian Holdings
Everyday Group
Cross River State
Client voices

What our clients actually say.

Every quote below is tied to a real, delivered outcome. Attribution is provided; project details available on request.

"Crestmark's fire-protection team turned around our hydrant ring main and pump-house tie-in without a single unplanned outage on the operating plant. Their weld packs and NDT documentation went into our handover dossier untouched."
Engr. F. Umoh
Project Engineering Lead · Saipem Contracting Nigeria
Zero remedial actions at handover
"They rebuilt the Ota–Sango corridor while keeping it open to daily traffic. Drainage capacity, walkways, and lighting have transformed how the community uses the road."
Hon. B. Adebanjo
Special Adviser, Infrastructure · Ogun State Government
6.4 km delivered on programme
"Grade A tenants don't tolerate snags. Crestmark handed our floor plates over ready for fit-out and hit the trading date we needed to protect our pre-lets."
T. Ogundipe, FRICS
Development Director · Meridian Corporate Holdings
92% pre-let within six months of PC
Ready to start?

Let's engineer what's next.

Talk to our commercial team about your project — from feasibility through delivery, we tailor scope to fit your programme, budget, and risk profile.