A Great Fit-Out Is More Than an Attractive Workspace

Behind every productive office is a technology infrastructure that supports people, systems and business operations from the moment the building is occupied. Cloud platforms, Microsoft Teams, IP telephony, wireless networking, access control, CCTV and modern meeting rooms all depend on a reliable, professionally designed communications infrastructure.

ACCL works with fit-out contractors, M&E consultants, project managers and electrical estimating teams to build that infrastructure into the project from the earliest design stage. Rather than teaching every discipline in full on this page, here is where to go for each one:

CAT A and CAT B Office Fit-Outs

Whether you are delivering the landlord’s base infrastructure or the tenant’s finished workplace, ACCL’s engineers deliver both to the same standard.

CAT A office infrastructure: the essential base-build technology layer that prepares a building for occupation: Cat6/Cat6A cabling, fibre optic backbone, communications rooms, data cabinets, containment, riser cabling, patch panels, building distribution, earthing and bonding, labelling, testing and certification.

CAT B workplace fit-outs: transforming an empty office into a fully functioning workplace: desk data cabling, floor box and under-floor cabling, furniture connectivity, enterprise Wi-Fi, AV infrastructure, access control, CCTV, digital signage cabling and comms cabinet patching, tested and documented before handover.

Comms Rooms, Cabinets and Collaboration Spaces

  • Comms Rooms, Cabinets and Containment

    We plan the data centre environment, server and network cabinets and containment at design stage, with capacity for day-one requirements and future expansion.

  • Power, Cooling and Environmental Coordination

    UPS provision, cooling and environmental monitoring for comms rooms and cabinets, coordinated with the wider M&E installation so the network has the power and environment it needs from day one.

  • Audio Visual and Collaboration Spaces

    Cabling and infrastructure for Microsoft Teams and Zoom Rooms, video conferencing, interactive displays and digital signage, installed so the AV integrator can commission each room reliably.

  • Digital Signage and Room-Booking Technology

    Cabling for digital signage, wayfinding and room-booking panels outside meeting spaces, coordinated alongside the rest of the fit-out’s technology infrastructure rather than added on afterward.

Pre-Construction Cost Planning for Electrical Estimating Teams

ACCL’s involvement often begins before a specification exists. Working alongside consultants and electrical estimating departments, we help develop realistic technology infrastructure budgets from the earliest design stages. This covers the RIBA Plan of Work from Stage 2 concept design through Stage 3 spatial coordination and Stage 4 technical design and tender submission, while there is still time to control cost.

Where a design is still incomplete, ACCL provides sensible, clearly flagged budget allowances based on building size, occupancy, workstation numbers and comparable projects, rather than leaving estimating teams to guess.

Estimating Support We Provide

  • Budget Cost Plans

    Early-stage feasibility budgets when information is still limited.

  • Cost Planning

    Detailed elemental pricing for commercial developments.

  • Tender Pricing

    Competitive subcontract pricing to agreed deadlines, often returned within 24–48 hours for smaller budget estimates.

  • Value Engineering

    Alternative products and installation methods that protect performance while improving project value.

  • Design Review

    Technical verification prior to tender to catch omissions and coordination issues before they become variations.

  • Programme Advice

    Realistic installation durations and resourcing, based on actual site conditions rather than generic estimating-software defaults.

  • Risk Identification

    Flagging the design assumptions behind every budget so the right contingency can be applied, and reducing costly variations after contract award.

The ACCL 3 dB Infrastructure Assurance

Unlike most technology infrastructure contractors, ACCL builds this exclusive assurance into every qualifying fit-out project. By designing and testing installations to tighter performance margins than standard certification alone, clients benefit from infrastructure engineered for long-term reliability, with added confidence that today’s installation will continue to support tomorrow’s technologies.

Trusted on London Office Fit-Outs

ACCL’s estimating and pre-construction teams have supported CAT A and CAT B office fit-out projects for main contractors and fit-out specialists including Mace, ISG, Overbury, Structure Tone, Parkeray, Bouygues UK, JLL and Tétris.

Why Fit-Out Teams and Estimators Choose ACCL

  • Single-source pricing across cabling, Wi-Fi, CCTV and access control
  • Fast budget pricing and detailed tender submissions
  • Engagement from RIBA Stage 2, before the specification is fixed
  • Commercially realistic labour allowances for live, occupied and phased sites
  • Value engineering and design-review recommendations
  • ISO 9001, ISO 14001 and ISO 45001 certified; Constructionline registered
  • £10m public liability, £10m products liability, £1m professional indemnity, £300k contractors all risks cover

Our Fit-Out Delivery Process

  • Consultation

    Understand the project’s objectives, occupancy and technology strategy.

  • Survey

    Assess the site and existing infrastructure.

  • Design and Cost Planning

    Develop scalable infrastructure and, where needed, budget/tender pricing.

  • Coordination

    Align with consultants, contractors and client teams.

  • Installation

    Professional delivery by experienced commercial engineers.

  • Testing and Certification

    Fluke certification plus the 3 dB Infrastructure Assurance.

  • Documentation

    Test results, labelling, as-built drawings and O&M manuals.

  • Handover

    A fully commissioned infrastructure, ready for immediate occupation.

Refurbishment and Relocation

A fit-out project doesn’t always start from an empty shell. ACCL regularly works within occupied commercial environments, delivering upgrades and relocations around live business operations through out-of-hours and weekend working, phased programmes, legacy cabling removal and Cat5-to-Cat6A migrations. For ongoing moves, adds and changes outside a full fit-out project, see our office cabling service.

Featured case studies

Planning an Office Fit-Out?

Whether you need an early-stage budget estimate, a fully detailed technology infrastructure cost plan, or delivery of a CAT A or CAT B fit-out, ACCL provides the technical and commercial expertise to strengthen your project from concept through to handover.

0333 900 0101 sales@network-data-cabling.co.uk Discuss Your Project

Frequently Asked Questions – (FAQs)

Q. What is the difference between CAT A and CAT B office fit-outs?

CAT A is the landlord’s base build that prepares the space for occupation, including backbone cabling, comms rooms and containment. CAT B is the tenant’s fit-out that turns that shell into a working office, including desk connectivity, Wi-Fi, CCTV, access control and meeting rooms. ACCL delivers both to the same standard.

Q. When should ACCL be involved in an office fit-out project?

Bring ACCL in during early design and pre-construction, ideally from RIBA Stage 2. That gives the project team time for budget planning, technology coordination, design review and value engineering before the tender is finalised.

Q. Can you provide budget pricing before the technology design is finalised?

Yes. Many projects we support are still at concept or RIBA Stage 2–3. We regularly prepare realistic budget costs from building size, occupancy, workstation numbers and anticipated technology requirements, flagging the assumptions behind every figure so the right contingency can be applied.

Q. What is included in a coordinated technology infrastructure package?

Structured data cabling, fibre optic backbone, enterprise Wi-Fi, CCTV, access control, comms rooms and cabinets, containment interfaces and AV/collaboration-space infrastructure, priced and delivered as one package rather than separate quotations.

Q. Do you work directly with electrical estimating departments?

Yes. Many clients use ACCL as an extension of their own estimating team, providing technical support, pricing updates, clarifications and engineering advice throughout the tender period.

Q. Can ACCL support CAT A and CAT B projects across London and the South East?

Yes. We regularly support CAT A base-build, CAT B fit-outs, landlord works, office relocations and refurbishments throughout London, Kent, Surrey and the wider South East.

Q. How much contingency should be included in an early-stage budget?

This depends on how developed the design is. Early concept budgets carry more uncertainty and warrant a larger allowance, while detailed tender pricing against completed drawings needs far less. ACCL flags the design assumptions behind every budget so estimating teams can apply contingency that reflects the real level of risk.

Q. How is this different from ACCL’s individual service pages?

This page covers the coordinated package for a whole office fit-out project. For technical depth on a single discipline, such as structured cabling, fibre, Wi-Fi, CCTV or access control, see the relevant dedicated service page linked throughout this page.

Q. What information do you need to prepare a budget cost plan?

Architectural drawings, furniture layouts, reflected ceiling plans, outline specifications, client briefs or even concept designs are all useful. Where information is limited, ACCL recommends sensible allowances based on comparable commercial fit-out projects.

Q. How quickly can ACCL return a tender or budget price?

It depends on project complexity. Smaller budget estimates can often be returned within 24–48 hours, while larger commercial tenders are delivered to the agreed programme deadline.

Q. Can ACCL identify missing items or coordination issues before tender?

Yes. Our design review frequently identifies omissions, coordination gaps or opportunities to improve the design before a project is tendered, helping reduce post-contract variations.

Q. Can you offer value engineering options for a fit-out project?

Yes. We regularly recommend alternative products, equipment layouts and installation methods that protect performance while improving project value and reducing installation cost.

Q. How long does an office fit-out technology infrastructure project typically take?

It depends on scope and complexity. A single-floor CAT B fit-out can take a few weeks; a larger multi-floor CAT A and CAT B programme may run over several months. ACCL plans the technology infrastructure works around the wider construction programme so they support, rather than delay, project milestones.

Q. Can ACCL deliver a fit-out in a phased or occupied building?

Yes. We regularly work within live business environments, using out-of-hours, weekend and phased working to keep disruption to a minimum while the technology infrastructure is installed, tested and handed over in stages.

Q. Which areas do you cover for office fit-out projects?

ACCL delivers office fit-out technology infrastructure across London, Kent, Surrey and the wider South East, with broader UK coverage available for larger or multi-site programmes by agreement.