As local concrete base contractors, we lay bases across Streatham SW16 for sheds, garden rooms and home offices, including in terraced gardens where everything comes through the house. Close by in Clapham we built a shed base as part of Victor's new garden, and in Brixton Hill a garden room base reached only through the house.
Building a base when the only way in is the hallway
Plenty of Streatham terraces have no side access, so the materials for a concrete base, and the old slabs and soil coming out, all go through the house. We plan for it from the first visit: protecting the floors, keeping the route clear and working out how the concrete will get to the back.
Franziska's garden in Brixton Hill, two and a half miles from Streatham, was exactly that kind of job. Over five days, with access through the house, we built a concrete base for a garden room, laid 20m² of turf, put in a black Indian sandstone footpath and replaced three back fence panels.
The ground matters too. Streatham gardens are mostly on clay, which shifts between wet winters and dry summers, so we dig out to firm ground and lay steel reinforcement mesh in the slab before pouring.
On a steep garden with access only through the house, concrete was pumped in for a base, new steps and a shed base, the steps were clad in London Stone bullnose porcelain and a 25m² grey 60 × 90cm porcelain patio was laid with a concrete edge, in one week for £9,250 including VAT.
An 8ft × 10ft concrete shed base with steel reinforcement mesh and a brushed finish, after removing old concrete and soil, completed in one day for £1,820 including VAT.
Every photo here is from Victor's garden in Clapham SW4, where a concrete shed base went in alongside a new lawn, slate paving and a French drain.
↗New lawn and slate footpath in Clapham SW4 being watered in01↗Slate paving beside the pressure washed deck in Clapham02↗Slate paving section and deck in Clapham SW403↗New lawn and slate footpath seen from the steps04↗View across the deck and slate paving to the new lawn05
Materials & possibilities
Planning the base for your building
We size and build the base around what is going on it and how we can get to it.
01
Base within a garden makeover
Done once
A shed base poured as part of a bigger job, as with Victor's new lawn, French drain and slate paving in Clapham.
02
Garden room base
Through-the-house access
A concrete base for a garden room, built with every material carried through, as in Brixton Hill.
03
Pumped concrete
Steep or hard to reach
A concrete truck and pump placing the base, as on Lucy's steep garden in Shortlands.
Leaving the slab to cure
Fresh concrete needs time before it takes a building's weight. After pouring and finishing, the slab is left to cure so it reaches its strength, and only then does the shed or garden room go on. We will tell you how long to leave it before your building goes on.
From first ideas to finishing touches
A clear path to your finished garden.
01
Free visit
We measure the footprint and look at the access route.
02
Written quote
Dig-out, reinforcement, concrete and waste, all priced.
03
Lay the base
Protect the house, dig out, set out, mesh and pour.
04
Handover
A level, cured slab ready for your building.
BeforeAfter
Documented project · Clapham SW4 · 2.4 miles from Streatham
Slate paving, new lawn and French drain in Clapham
Victor's back garden, between Brixton and Clapham, took 10 days: a new lawn, a French drain, a slate footpath and paving section to Victor's own design, and a concrete base for a shed. The existing deck and fence were pressure washed too. £9,220 including VAT. Drag the slider to compare.
How much does a garden room base cost in Streatham?
A plain 8ft × 10ft reinforced shed base in Beckenham was £1,820 and took a day. Franziska's garden room base in Brixton Hill came within a £5,650 job with turf, a sandstone path and fencing, and Victor's shed base in Clapham was part of a £9,220 garden. Access through the house and the size of the slab make the biggest difference to the price.
Compare like for like. Check the size and depth of the slab, whether reinforcement is included, how materials reach the garden and that all the waste is taken away.
How much does a garden room base cost in Streatham?
It depends on size and access. Franziska's garden room base in Brixton Hill was part of a £5,650 job with turf, a sandstone path and fencing; a plain 8ft × 10ft shed base in Beckenham was £1,820.
Can you lay a base if my house has no side access?
Yes. Franziska's garden room base in Brixton Hill was built with everything going through the house, and on Lucy's garden in Shortlands the concrete was pumped in.
Can a shed base be part of a bigger garden job?
Yes. In Clapham we laid Victor's shed base alongside a new lawn, a French drain and slate paving in a 10-day job.
Why put steel mesh in a base on Streatham clay?
Clay moves between wet and dry seasons. Reinforcement mesh helps the concrete resist cracking as the ground shifts.
When can my garden room go on the new base?
Once the concrete has cured. We let you know on the day how long to leave it before the building goes on.
Do I need planning permission for a garden office?
Often not, if it stays within permitted development limits on size and height. Lambeth Council can confirm for your property, especially in a conservation area.
Which parts of Streatham do you lay concrete bases in?
All of Streatham, including Streatham Hill, Telford Park, Streatham Park, Furzedown and Streatham Common.
Let's make a start
Your next chapter starts in the garden.
Tell us about your shed bases project in Streatham. We will get in touch to discuss your ideas and the next step towards a site survey.