Dartford · Est. 2008 · 8-person team
Builds, extensions,
refurbishments.
Done in-house.
A mid-size team in Dartford with electrical, plumbing and joinery on the books — not subcontracted. We quote within 48 hours and we turn up when we say we will.
4.9★
124 Checkatrade reviews
18yr
On the road
£5m
Public liability
- Federation of Master Builders
- TrustMark Government-Endorsed
- Public Liability £5m
- 12-Year Workmanship Guarantee
01 — Capabilities
Everything in-house.
No subcontractors.
Builders, electricians, plumbers and joiners — all on our payroll. When you hire us, you don't get a builder who chases other trades on your behalf. You get one team, one programme, one accountable point of contact.
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Extensions & New Builds
Single-storey rears, two-storey side, full new builds. Drawings to sign-off, all under one roof.
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Loft Conversions
Hip-to-gable, dormer, mansard. Adds 25–35% to most family homes.
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Kitchens & Bathrooms
Strip-out to final tile. We project-manage the lot, including bespoke joinery.
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Electrical · NICEIC
In-house. EICR, full rewires, consumer units, EV chargers — all certified.
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Plumbing & Heating · Gas Safe
In-house. Boiler swaps, full system installs, underfloor, bathrooms.
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Joinery & Finishes
Bespoke staircases, fitted wardrobes, decorating, flooring, second-fix.
02 — Recent projects
Last 18 months
on the books.
A few projects from across SE London and Kent — extensions, lofts, full refurbishments, and a new build. Sizes range from £28k to £480k; turnaround from a fortnight to most of a year.
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01/6 · 2024Two-storey side extension
Side extension adding kitchen-diner downstairs and master suite above. Steel frame, glazed sliders, oak joinery throughout.
- Location
- Sevenoaks · TN13
- Duration
- 14 weeks
- Value
- £148k
-
02/6 · 2024L-shaped loft conversion
L-shape dormer adding two bedrooms and a bathroom in a Victorian terrace. Roof lights and oak floors.
- Location
- Bexleyheath · DA7
- Duration
- 8 weeks
- Value
- £62k
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03/6 · 2024Full house refurbishment
Strip-back refurb: rewire, replumb, new heating, kitchen, three bathrooms, decorating throughout.
- Location
- Greenwich · SE10
- Duration
- 22 weeks
- Value
- £310k
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04/6 · 2023Open-plan kitchen extension
Single-storey rear with skylights and bi-folds, knocking through into the existing dining room.
- Location
- Dartford · DA2
- Duration
- 11 weeks
- Value
- £95k
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05/6 · 2023New-build detached home
Four-bed family home, slab to sign-off. Air-source heat pump, integrated solar, EV charger.
- Location
- Otford · TN14
- Duration
- 38 weeks
- Value
- £480k
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06/6 · 2023Bathroom & en-suite refurb
Family bathroom and master en-suite, full strip-out, underfloor heating, walk-in shower, bespoke vanity.
- Location
- Bromley · BR1
- Duration
- 4 weeks
- Value
- £28k
A fuller portfolio is available on request — just ask when you book a quote.
03 — Coverage
Where we work.
We're a mobile team. We turn up wherever the job is — typically within an hour of Dartford, but we'll travel for the right project.
Primary coverage
We also travel to
Outside our patch? We'll still come and have a look for projects over £75k. Get in touch.
Dartford · Gravesend · Bromley · Sevenoaks · SE London
04 — The team
8 people.
All on the books.
When you meet someone on site, they're paid by Northway — not some third-party crew that disappears mid-project. Combined, the team has 80 years of trade experience.
- MN
Mark Northway
Founder & Lead Builder
18 years experience
- JW
James Whitlow
Site Manager
12 years experience
- TB
Tom Beckett
Master Builder
9 years experience
- PS
Priya Shah
Project Manager
6 years experience
- AB
Aaron Brooks
Lead Electrician · NICEIC
11 years experience
- DW
Dan Wilson
Plumbing & Heating · Gas Safe
14 years experience
- CN
Charlie Ng
Joiner & Finishes
7 years experience
- SC
Sarah Cook
Apprentice & Decorator
3 years experience
05 — How we work
Four steps.
No surprises.
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01
Free quote
Book a site visit. We turn up, look at the job, and send a clear written quote within 48 hours.
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02
Plan & design
We coordinate drawings, structural sign-off, building control and any party-wall work.
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03
Build
Our team — not subcontractors — does the work. Daily site updates by message. No surprise costs.
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04
Sign-off
Snag list, building-control sign-off, all certificates emailed. 12-month workmanship guarantee.
06 — What clients say
4.9 stars on Checkatrade.
124 reviews.
Northway managed our two-storey extension end-to-end. Daily WhatsApp updates, no surprise costs, finished a week ahead of schedule.
Helen & Mark — Sevenoaks
Two-storey side extension
Best decision we made was using a builder with everyone in-house. No waiting on a sparkie or plumber to turn up — they're the same team.
Priti R. — Dartford
Kitchen extension
Properly run site. Tidy at the end of every day, polite team, clear paperwork. Worth every penny.
James K. — Bromley
Loft conversion
We had two cowboys before Northway. The difference was night and day — proper trades, proper paperwork, proper job.
Dawn F. — Bexleyheath
Bathroom refurbishment
07 — Beyond the website
Wire your whole business with us.
When you're ready, we can plug in scheduling, accounting, supplier comms and customer dashboards — all on one platform. The website is the front door; Bytecode Studio builds the rest of the operations behind it.
08 — Get a quote
Tell us about the project.
Quick details and we'll come and have a look. Free no-obligation quote within 48 hours.