Builders in Streatham from our office in SW16
Design and build, extensions, loft conversions, renovations and renewables
Our office is at 1417–1419 London Road, Norbury, in the same SW16 postcode district as Streatham. In Streatham itself we turned a Victorian factory on Shrubbery Road into two apartments. OKPW has traded since 2007.
Shrubbery Road, a factory turned into two apartments
On Shrubbery Road we converted a Victorian factory into two self-contained apartments. From the lane it looks as it did: the London stock brick, the arched windows and the old loading door are all kept. Inside, the arched windows light the new rooms, and a spiral stair rises to the second apartment.
The building is 500m², and the work took 48 weeks on site, about 11 months. A conversion like this is priced after a survey, not from a calculator.
The gable end, with its arched window. 
A living room lit by three arched windows. 
A kitchen beneath an arched window. 
The spiral stair beside the kitchen.
Work we take on in Streatham
- Design and build →
One team from the first drawings to handover, with a fixed written quote for the building work. We work up the drawings with our architectural partners.
- Extensions →
Rear, side return and wraparound extensions.
- Loft conversions →
Dormer, hip-to-gable and mansard loft conversions.
- Renovations →
Full house renovation: rewires, replumbs, kitchens, bathrooms and decoration in one programme.
- New builds →
Ground-up residential and commercial construction across Greater London.
- Heat pumps and solar panels →
We plan heat pumps and solar panels into the building work. They are fitted and certified by an MCS-certified installer.
Planning in Streatham goes to Lambeth
Streatham is in the London Borough of Lambeth, so a planning application goes to Lambeth. SW16 crosses a council border, though: Norbury, where our office is, comes under the London Borough of Croydon. So the first thing we check is which council your address comes under.
Many single-storey rear extensions fall under permitted development. We check this for free. Where full planning is needed, we prepare and submit the application for you.
Our guides cover planning permission for extensions, planning permission for a loft conversion and party wall agreements. For the rest of the borough, see builders in Lambeth.
Guide prices for extensions, lofts and renovations
These are guide prices for the building work, plus VAT. They are the same figures our cost calculator uses.
| Job | Sizes the guide covers | Guide price, plus VAT |
|---|---|---|
| Rear extension | Smallest: 3m depth (about 12m²) Largest: 6m+ depth (about 30m²+) | £62,000 to £165,000 plus VAT |
| Double storey extension | Smallest: 3m depth (about 24m² total) Largest: 6m+ depth (about 50m²+ total) | £100,000 to £260,000 plus VAT |
| Dormer loft conversion | Smallest: bedroom only, 1 room (about 18-22m²) Largest: full loft, 2 rooms + bathroom (about 30-40m²) | £45,000 to £160,000 plus VAT |
| Mansard loft conversion | Smallest: 1 bedroom + en-suite (about 25-30m²) Largest: full floor, multiple rooms (about 45-60m²) | £85,000 to £260,000 plus VAT |
| Full house renovation | Smallest: flat / 1-2 bed, up to 70m² Largest: 4+ bed house, 120m²+ | £85,000 to £280,000 plus VAT |
These guide prices are illustrative while launch pricing is finalised. The guide prices leave out VAT, architect drawings and structural engineer fees. Drawings are priced separately and we do not publish a figure for them.
A guide price is not a quote. Your exact price follows a free survey. For prices by size, see our guides to extension costs, loft conversion costs and renovation costs in London.
See also
Common questions
Where is your office?
At 1417–1419 London Road, Norbury, London SW16 4AH, in the same postcode district as Streatham. It is our registered office, and OKPW has traded since 2007.
What have you built in Streatham?
On Shrubbery Road, SW16, we converted a Victorian factory into two apartments. The building is 500m² and the work took 48 weeks on site. See the project.
Which council deals with planning in Streatham?
The London Borough of Lambeth. Norbury, which shares the SW16 postcode, comes under the London Borough of Croydon, so we check which council your address comes under first.
Do you fit heat pumps and solar panels?
We plan heat pumps and solar panels into the building work. They are fitted and certified by an MCS-certified installer. See our renewables page.
Is the survey free?
Yes. We visit, measure and listen. The survey is free and there is no obligation.
Tell us about your project in Streatham
Send us a few lines about your home and what you would like to change. We will be in touch to arrange a free survey.
+44 (0) 773 776 6859
+44 (0) 791 235 7492