Portsmouth
Office Fit Out and Refurbishment in Portsmouth
We are a Portsmouth commercial fit out contractor based at 1000 Lakeside, North Harbour. We fit out and refurbish offices, commercial units and workspaces across the city, with one project manager from the first survey to handover and an itemised quote before anything starts.

Based in Portsmouth
Our office is at Lakeside, North Harbour
Trading Since 2013
Led by a director with over 30 years in commercial fit out
One Point of Contact
The same project manager from survey to handover
Itemised Quotes
Every element priced separately, with a programme
Your Local Fit Out Contractor
Being based in Portsmouth makes a real difference on a fit out. We can survey quickly, be on site when it matters and deal with problems quickly rather than waiting for a contractor to travel in. Many of our clients are Portsmouth businesses, landlords and managing agents who have used us on project after project.
- Fit outs of new and empty offices, from shell to finished workspace
- Refurbishments of occupied offices, phased so your team keeps working
- Cat A works for landlords and Cat B works for tenants
- End of lease dilapidations and reinstatement
- Compliance built in: Building Regulations, fire stopping and certification at handover
- Furniture supplied and installed as part of the same project
Our Work in Portsmouth

Mezzanine Floor Fit Out
A new mezzanine floor for a long standing Portsmouth client, with fire rated partitions, a compliant staircase, an upgraded kitchenette and a full fit out below and above.
See the project
Open Plan Office Fit Out
An open plan office with new carpet tiles and glazed partitions, creating a bright working floor with private rooms alongside.
About this service
Office Refurbishment and Reception
A refurbished reception with a new desk and glazed partitions, giving visitors a better first impression.
About this service
Breakout Room
A breakout room created within an existing Portsmouth office, giving staff somewhere to eat, meet and take a break.
About this service
Acoustic Meeting Room
A meeting room with a new suspended ceiling and acoustic wall panels to keep conversations private.
About this serviceOur Services in Portsmouth
Commercial Fit Outs
Complete fit outs of offices and commercial units, managed as one project.
Find out moreOffice Refurbishment
Refreshing and reconfiguring occupied offices with minimal disruption.
Find out moreMezzanine Floors
Extra floor space within your existing building, fully compliant.
Find out moreOffice Partitions
Glazed and stud partitions for offices, meeting rooms and private space.
Find out moreSuspended & MF Ceilings
Suspended and MF ceilings, including lighting and acoustic upgrades.
Find out moreCommercial Flooring
Carpet tiles, vinyl and entrance matting for busy commercial spaces.
Find out moreElectrical & Mechanical Works
Power, data, lighting and mechanical works coordinated with the fit out.
Find out moreDilapidations & End-of-Lease Works
End of lease dilapidations and reinstatement works.
Find out moreDesign & Space Planning
Layouts and drawings so you can see the space before work starts.
Find out moreHow Long Does an Office Fit Out Take?
Cosmetic refresh
Two to Four Weeks on Site
Decoration, flooring and minor alterations to a smaller space.
Mid range refurbishment
Four to Eight Weeks on Site
Partitioning, ceilings, flooring and electrical works in a typical office.
Full fit out
Eight to Twelve Weeks or More
Larger or more complex spaces, multiple floors, structural or mezzanine works.
Allow one to two weeks from first contact to an itemised quote, and time for approvals and materials before work starts. For a mid range fit out, eight to fourteen weeks from first conversation to moving in is realistic. Read our full guide to fit out timescales.
How a Portsmouth Project Runs
Site Visit
We visit your Portsmouth premises, measure up and talk through what you need, free of charge.
Itemised Quote and Programme
You get every element priced separately and a programme with start and finish dates.
Planning and Approvals
We sort out drawings, landlord consents and Building Regulations before work starts.
Managed Delivery
One project manager coordinates every trade and keeps you updated throughout.
Handover
Snagging, certification and a thorough handover, with us still close by afterwards.
Areas We Cover in and Around Portsmouth
From our base at Lakeside, North Harbour we cover the whole of Portsmouth and the surrounding area.
Nearby areas we also cover:
Reviews
I have worked with Commercial Building Solutions on several refurbishment projects and they have consistently delivered quality work safely, on time, on budget, with good communication and dealing proactively with any unforeseen issues.
Commercial Building Solutions Ltd undertake works to a first-rate standard with good attention to detail. Their proactive approach to communication enables us as Project Managers to effectively resolve issues in a timely manner.
Common Questions
How much does an office fit out in Portsmouth cost?
It depends on the size of the space, how much is changing, the specification of finishes and whether the work has to be done around your staff. The only reliable way to price it is a site visit, so we survey the space free of charge and send an itemised quote with every element priced separately.
What is the difference between an office fit out and an office refurbishment?
A fit out usually means making a space ready to use, often a new or empty unit, from the base building through to a finished office. A refurbishment improves or reconfigures a space you already occupy, such as new partitions, ceilings, flooring or a refreshed reception. We do both, and many projects are a mix of the two.
What is included in an office fit out?
Typically partitioning, ceilings, flooring, electrical and data works, lighting, heating and cooling, decoration, kitchens and washrooms, and often furniture. A Cat A fit out covers the base finishes and services, while a Cat B fit out adds everything specific to your business.
How long does an office fit out take in Portsmouth?
Most fit outs take between four and twelve weeks on site, depending on the scope. A small cosmetic refresh can take two to four weeks, while larger or more complex projects can take twelve weeks or more. We give you a programme with your quote.
Can you work while our office stays open?
Yes. We regularly refurbish occupied offices in Portsmouth, phasing the work and planning noisy tasks around your team so the business keeps running.
Which areas of Portsmouth do you cover?
All of Portsmouth and Portsea Island, from Southsea and Old Portsmouth to Cosham, Hilsea and North Harbour where we are based, plus Gosport, Fareham, Havant, Waterlooville and the rest of Hampshire, the South Coast and Sussex.
Planning a Fit Out or Refurbishment in Portsmouth?
Tell us about your space and we will arrange a free site visit and an itemised, no-obligation quote.
- We call you backWithin one working day, to understand what you need.
- Free site visitWe survey the space and talk through options with you.
- Itemised quoteA clear, no-obligation quote and programme.
