Rear kitchen extension — Bow
4m wraparound on a Victorian terrace: steels, underfloor heating, full-width sliders. Party-wall agreements and building control handled by us, start to finish.
- Budget
- £88k
- Duration
- 11 wks
- Value added*
- £140k
Extensions measured in added value.
Bowline & Sons has been building East London's extensions, lofts and refurbishments since 1987. Fixed quotes, a named foreman on every job, and case studies with the real numbers in them.
- 39
- Years trading
- 400+
- Projects completed
- 0
- Unresolved disputes
Case studies
Real jobs, real numbers
Every builder says "trust us". We'd rather show you budgets, timelines and what the surveyor said afterwards.
L-shaped loft conversion — Mile End
Dormer loft with en-suite: two bedrooms gained without touching the garden. Scaffold to sign-off in under ten weeks, family in the house throughout.
- Budget
- £72k
- Duration
- 9 wks
- Beds added
- +2
Full refurbishment — Victoria Park
Back-to-brick refurb of a tired four-bed: rewire, replumb, new heating, replastered throughout, two new bathrooms. One contract, one point of contact.
- Budget
- £165k
- Duration
- 16 wks
- Snag list
- Zero
*Value added = independent post-completion valuation minus pre-works valuation. Demo figures.
Capabilities
What we build
Extensions
Rear, side-return and wraparound. Steels, glazing, the lot.
Loft conversions
Dormer, hip-to-gable and mansard, with building control sign-off.
Refurbishments
Back-to-brick or room-by-room. One contract, fixed price.
Kitchens & bathrooms
Design, supply and fit — plumbing and sparks in-house.
Structural work
Chimney breast removal, knock-throughs, underpinning.
Planning support
Drawings, party-wall and permitted-development guidance.
Reviews
On the record
★★★★★
The quote was the third cheapest of four — and the only one that didn't grow. What they said in week one is what we paid in week eleven.
★★★★★
Lived in the house through a nine-week loft build with a toddler. Dust screens everywhere, site broom-clean every Friday. Unheard of.
★★★★★
Our architect said the steelwork was the tidiest he'd signed off all year. Second project with them; there'll be a third.
Coverage & credentials
Built on reputation since 1987
Two generations, one postcode patch. We take on a limited number of projects at once and never leave a site half-crewed:
- Bow
- Mile End
- Victoria Park
- Hackney
- Stratford
- Wanstead
- Leyton
- Walthamstow
FMBMaster Builders member
39 yrsFamily-run, est. 1987
£10mPublic liability insured
10 yrStructural guarantees
Start a project
Tell us what you're planning
020 8981 5540
Office hours Mon–Fri 8am–5pm. Site visits and quotes are free within our coverage area.
Email: office@bowlineandsons.co.uk