★★★★★96.1% customer satisfaction · 1,250+ jobs since 2005 · up to 30-year guarantee
20+
Years protecting NE homes
1,250+
Damp jobs quoted since 2005
96.1%
Customer satisfaction
30yr
Guarantee on qualifying work
Unlock hidden space
From damp cellar to dream room
A basement conversion transforms an unused, often damp cellar into valuable, dry living space. The secret to a conversion that lasts is getting the waterproofing right first: we waterproof to BS 8102, then insulate, fit out and finish the room so it's warm, dry and ready to enjoy — adding both usable space and value to your North East home.
What it could become
Endless possibilities downstairs
Home office or studio
Home gym or cinema room
Utility & laundry room
Extra bedroom or guest suite
Playroom, snug or bar
Dry, secure storage
Waterproofing comes first
A beautiful conversion is only as good as the waterproofing beneath it. We never skip this step — every conversion starts with a proven, guaranteed waterproofing system so your new room stays dry for decades.
A 96.1% satisfaction rating isn't an accident — it's what happens when local specialists do the job properly, the first time.
★★★★★
“Dean was professional from start to finish and finished ahead of schedule — all backed by a 30-year guarantee. Couldn't recommend them more.”
ST
Sarah T.Newcastle upon Tyne · Verified customer
★★★★★
“Had tide marks creeping up the hallway for years. The survey explained exactly what was wrong and the price was fair. Bone dry now.”
MR
Mark R.Gateshead · Verified customer
★★★★★
“Black mould in the bedroom was making us ill. Honest advice, no scare tactics, sorted in two days. Brilliant local team.”
JP
Joanne P.Sunderland · Verified customer
Damp questions, answered
Basement & Cellar Conversions Newcastle FAQs
Can my cellar be converted into a room?
Most cellars and basements can be converted once properly waterproofed. We start with waterproofing to BS 8102, then create a dry, insulated, usable room — a home office, gym, utility, snug or extra bedroom.
Do I need planning permission for a basement conversion?
Converting an existing cellar to living space usually falls under permitted development and building regulations rather than full planning permission, but excavating or lowering a floor can be different. We'll advise on what your project needs.
How long does a basement conversion take?
It varies with size and specification, but most domestic cellar conversions run over a few weeks from waterproofing through to a finished, decorated room. We'll give you a clear timeline with your quote.
Is the waterproofing behind the conversion guaranteed?
Yes — the waterproofing system is backed by a written guarantee, giving you confidence in your new space for the long term.
This is a lead generation website. By submitting your details you are simply being passed to a reputable, independent tradesman.
Any work carried out is paid directly to them, not to North East Damp Proofing.
