Steel-Framed Modular Buildings for Horsham
Adacon specializes in the P600 modular system. Each module provides approximately 13 m² of floor space, constructed with a robust steel frame and high-performance insulation. These are not flat-pack kits; they are manufactured in our controlled production facility and delivered to your Horsham property as finished units. The internal finish includes plastered and painted walls, laminate flooring, and integrated electrical systems, ensuring the building is ready for use almost immediately after installation.
Typical Garden Room Configurations
The versatility of the P600 system allows Horsham residents to design a space that fits their specific site requirements, whether dealing with a compact urban garden or a sprawling rural plot. You can explore these layouts using our P600 configurator to visualize your build.
Single Module (13 m²)
Ideal for a dedicated garden office or a private treatment room. A single module fits comfortably into most suburban gardens in areas like Holbrook or Littlehaven without overwhelming the outdoor space.
Double Module (26 m²)
By joining two modules side-by-side, you create a spacious environment suitable for a home gym, a secondary lounge, or a large creative studio. This configuration allows for partitioned internal areas, such as adding a WC or a small kitchenette.
Four+ Modules (52 m²+)
For those with larger properties on the outskirts of Horsham, multiple modules can be arranged in L-shapes or two-storey blocks. These larger builds are often used as self-contained annexes or expansive multi-purpose leisure suites.
Delivery and Site Access in West Sussex
Horsham’s mix of historic town centre streets and modern developments presents unique logistical considerations. We typically transport modules via the M23 and A24 corridors, approaching Horsham from the north or south. For properties in the town centre or older terraced streets, we assess narrow lane access and potential overhead obstructions like low-hanging trees or cables.
Delivery is usually managed via a lorry-mounted crane (hiab). If your garden is inaccessible from the road, a separate mobile crane may be required to lift the modules over the house. We have experience delivering modular buildings in Horsham and can advise on the best approach for sites with restricted access, such as those in the Carfax or near the park.
High-Specification Standard Inclusions
Every Adacon garden room comes with a standard specification designed for year-round comfort in the UK climate:
- Fully insulated floor, walls, and roof for thermal efficiency.
- Plastered and painted internal walls (no unfinished timber).
- High-quality laminate flooring throughout.
- Double-glazed uPVC windows and external doors.
- LED lighting and multiple power sockets.
- Customisable exterior cladding available in a range of colours, selectable wall by wall.
Indicative Pricing for Horsham Projects
While every project varies based on final specification and ground conditions, typical garden rooms in the Horsham area range from £15,000 to £35,000. This indicative band covers the building itself and the standard internal finishes. Additional costs to consider include delivery (quoted per site), groundworks, and final utility connections. We recommend using our online tools for an instant estimate, or you can request a formal quote for a detailed breakdown.
Planning and Building Regulations
In many cases, garden rooms fall under Permitted Development rights, meaning full planning permission may not be required. However, rules vary significantly depending on the size of the building, its proximity to boundaries, and whether your property is in a Conservation Area or a Listed Building setting. We strongly advise Horsham homeowners to consult with Horsham District Council or a professional planning consultant before commencing works. Similarly, if the building exceeds a certain size or includes sleeping accommodation, it must comply with UK Building Regulations.
Why Choose Adacon?
We provide a structural alternative to the common timber shed. Our steel-framed buildings offer greater longevity, better fire resistance, and a feel that is more akin to a traditional house extension than a garden outbuilding. With lead times typically measured in weeks rather than months, we offer one of the fastest routes to expanding your living space in West Sussex.
Related modular buildings
Design yours online — free
You can lay out a garden rooms in Horsham yourself in a few minutes with the free Adacon P600 configurator: arrange the modules in 3D, pick your windows, doors and cladding colours wall by wall, and see an estimated price straight away. There is no obligation and no salesperson — save the design and we will pick it up from there.
Prefer to talk it through? Request a free quote and we will come back with a specification and price for your project.