Concrete Bases in Marylebone built for sheds, summerhouses, hot tubs and more. We deliver reinforced slabs, a true level finish, and smart drainage for W1 homes.
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A well-built base is what keeps a shed, summerhouse or hot tub stable for years. We install concrete bases across W1, working around tight rear access and shared entrances common near Marylebone High Street and Baker Street. Every slab is set out precisely to suit your structure’s footprint and door clearance. Expect clean edges, accurate levels, and a finish ready for immediate installation.
Marylebone properties often include Georgian townhouses, mansion blocks and period conversions, each with different access and load requirements. Courtyard gardens and roof terraces can demand careful material handling and considerate scheduling. We regularly build concrete bases Marylebone area homeowners rely on for summerhouses, greenhouses and compact garages. Our team plans the pour and curing to minimise disruption while keeping the foundation structurally sound.
We start with a site visit to confirm levels, ground make-up and drainage routes, then provide a clear specification for thickness, reinforcement and finish. Sub-base preparation is never skipped: we compact, set shuttering, install steel mesh where required, and pour to a consistent depth. You’ll get tidy workmanship, reliable timelines and a base designed to prevent rocking, cracking and pooling. Many clients choose us for concrete bases in City of Westminster because we combine precision with practical, property-aware planning.
Marylebone sites often involve narrow side returns, basement lightwells and limited on-street parking, so we plan deliveries and barrowing routes carefully. Ground conditions can vary between made ground and compacted subsoil, particularly around Regent’s Park and older terraces. We build in the correct sub-base depth and drainage falls to suit the plot. Where council considerations apply in the City of Westminster, we help you stay compliant and keep neighbours onside.
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Costs depend on size, thickness and access. As a guide, small shed bases often start around £450–£900, while larger summerhouse or greenhouse bases are commonly £900–£2,000. Reinforced hot tub bases and garage bases typically range from £1,500–£4,000+. Tight access in W1, waste removal, excavation depth and drainage requirements can increase the price. We’ll confirm a tailored range after a site survey.
Most shed or greenhouse bases are completed in 1 day, with larger summerhouse or hot tub bases often taking 1–2 days including excavation and sub-base compaction. If spoil removal is significant or access is restricted (common in mansion blocks), allow extra time. Concrete usually needs 24–48 hours before light foot traffic, and around 7 days before heavier loads, depending on weather and mix.
A concrete base for a typical garden outbuilding is often permitted development, especially when it sits within the garden and the structure meets height and boundary rules. However, City of Westminster constraints can apply to listed buildings, conservation areas, or works that change drainage or levels significantly. We’ll flag likely issues during the survey and can advise what to check with the council before work starts.
We provide a 10-year warranty on our concrete base installation, covering workmanship such as incorrect levels, poor compaction, and structural issues caused by installation faults. The warranty assumes the base is used for its intended purpose and not overloaded beyond the design (for example, a hot tub base must be specified for the filled weight). We also document thickness, reinforcement and drainage falls for peace of mind.
We can build standard brushed-finish slabs, power-floated smooth finishes, or a slightly textured finish for safer footing. Options include thicker sections, steel mesh reinforcement, and perimeter thickening for heavier loads like hot tubs or garage bases. We also design drainage falls and can add a compacted sub-base upgrade where ground is soft. We’ll recommend the best specification based on your structure, access and soil conditions.
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