Mezzanine Floors

If your business is running out of space but relocating isn’t the right option, a mezzanine floor could be exactly what you need. At Commercial Building Solutions, we design and install commercial mezzanine floors across Portsmouth, Hampshire and the South Coast, so businesses can create additional usable space within their existing building without the cost and disruption of moving premises.

A well designed mezzanine becomes a seamless part of your building. Because it works within the structure you already have, it gives you more floor area, improves how your space operates and opens up options that simply weren’t there before.

Why Choose Commercial Building Solutions for Your Mezzanine Floor?

Installing a mezzanine floor is a significant structural project, so it needs to be done properly. We bring over twenty years of experience delivering mezzanine floors in offices, warehouses and industrial units across Portsmouth, Hampshire and the wider South Coast. Because we work across all types of commercial and industrial environments, we understand the structural requirements, the compliance obligations and the practical challenges of working in a live building.

From the initial survey through to final handover, we manage the entire process. That includes design coordination, structural calculations, building regulations approval, installation and integration with your existing services. Since we handle all of this ourselves, you don’t need to manage multiple contractors or chase progress updates.

Why businesses choose Commercial Building Solutions

Every mezzanine floor project starts with understanding how your space works now and how it needs to work in the future. We take a thorough, no-nonsense approach to planning so that the structure is right, the access is safe and the finished result integrates properly with everything around it.

What's Included in Mezzanine Floors?

Every mezzanine floor we deliver is designed around the specific requirements of the building and the business using it. Whether you need additional office space above a warehouse floor in Portsmouth or a storage level within an industrial unit across Hampshire, we tailor the design to suit. Here’s what we typically cover:

Mezzanine Floor Design

Tailored designs based on your space, load requirements and how your business needs to operate, with practical functionality at the centre of every decision.

Structural Steel Framework

Robust steel structures engineered for commercial and industrial use, built for long term strength, safety and durability.

Staircases and Access Systems

Safe, compliant staircases, handrails and edge protection systems that suit your mezzanine layout and meet current regulations.

Fire Safety and Compliance

We deliver all mezzanine floors in line with Building Regulations and fire protection requirements, so your project meets current safety standards from day one.

Office Mezzanine Floors

Create additional office accommodation within your existing building, avoiding the cost and upheaval of relocating to larger premises.

Warehouse and Storage Mezzanines

Make the most of your vertical space with mezzanine floors designed for storage, racking and operational efficiency in commercial and industrial environments.

Integration With Existing Services

We integrate all building services into the mezzanine design so the finished structure connects seamlessly with what’s already there.

Managed Installation Process

We plan and manage every installation carefully, whether your building is occupied or operational during the works, with a consistent focus on minimising disruption.

How We Deliver Your Mezzanine Floor in Portsmouth

Every mezzanine floor project starts with a site visit. We look at the space, assess the structural options and give you honest advice on what’s achievable and what it’s likely to cost. There’s no obligation and no pressure, just a practical conversation based on what we actually see.

Once we’ve completed the survey, you’ll receive a clear, itemised quotation covering design, structural calculations, supply, installation and any associated building works. We also agree a programme with you upfront, so you know exactly when each stage happens and when the project will be complete.

On site, we manage everything. If your building is operational during the works, we plan the installation carefully so disruption stays to a minimum, maintaining safe access and working cleanly throughout. Mezzanine installations involve structural steelwork, which means the process needs to be managed properly. That’s something we’ve been doing for over twenty years, and it shows in how our projects run.

When the mezzanine is complete, we hand it over fully compliant, properly finished and ready to use. If you’re based in Portsmouth, across Hampshire or anywhere on the South Coast and you’re considering a mezzanine floor, get in touch to arrange a site visit. You can also read more in our article How to Maximise Your Office Space Without Moving Premises.

Frequently Asked Questions

A mezzanine floor is an intermediate level we install within an existing building to create additional usable space. Because it works within the structure you already have, it’s one of the most cost effective ways to increase your floor area without extending the building or moving to larger premises.

You can use a mezzanine floor for office accommodation, storage, warehousing, production areas or a combination of uses. We tailor the design to suit your building and your specific load and access requirements.

Yes. Most mezzanine floors require Building Regulations approval, covering fire safety, structural integrity and access. We advise on compliance from the outset and manage the approvals process as part of the project, so you don’t need to navigate it yourself.

Yes. We regularly install mezzanine floors in occupied commercial and industrial buildings across Portsmouth and Hampshire. We carefully plan all works so your business can remain operational throughout.

Timescales vary depending on the size, complexity and specification of the project. Before work starts, we agree a clear programme with you so you know exactly what to expect from day one.

That depends on how you plan to use the floor. We engineer every mezzanine specifically to suit the intended use, whether that’s office loading, storage racking or industrial requirements.

The cost depends on the size, specification and intended use. We provide clear, itemised quotations following a site visit so you understand exactly what’s included before any work begins.

Our Process

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We support businesses with office refurbishments, interior updates, relocations, partitions, ceilings, flooring and full project management.


Contact us today to discuss your requirements and get expert guidance from our team.

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