What they feared
"Three builders told us three different things. One said the ridge was too low, another said the party wall would block everything. We nearly gave up."
What the inspection revealed
The ridge height at its apex measured 2.4m — well above the 2.2m threshold for comfortable habitable space. The party wall was brick-built and structurally independent. The rafter sizing was original 4×2 softwood, adequate for a simple room-in-the-roof with modest reinforcement. No structural objections to conversion.
What they built
A full dormer loft bedroom with en-suite
Completed ten months after inspection. 28 square metres of additional living space. Party wall agreement straightforward — the report gave their solicitor exactly what she needed.
"The report made us feel like we finally had an adult in the room. We went into every builder conversation after that knowing what we needed."
Sophie & Marcus T., East Dulwich
What they feared
"The builder said the rafters were 'too thin' and we'd need a full structural engineer's report before he'd quote. He wanted £800 for the report. We wanted to know if it was even worth it."
What the inspection revealed
The rafters were 3×2 softwood at 400mm centres — typical of the period and within acceptable range for a loft conversion using a structural ridge beam and steel hangers. No engineer's report was required at this stage. The existing chimney stack would need minor underpinning but presented no structural obstacle.
What they built
A home office with a south-facing dormer
The owner used the Joists report to get three accurate comparable quotes. The range was £38,000–£44,000 — a fraction of the wild variance before the inspection. Work began four months later.
"We saved at least £2,000 in unnecessary preliminary costs and three months of anxiety."
David K., New Malden
What they feared
"Our architect kept asking us questions we couldn't answer. What size are the purlins? Is there a party wall agreement in place? We felt completely out of our depth."
What the inspection revealed
The purlins were 6×2 softwood in sound condition with no sign of beetle or rot. The party wall had been formally agreed by the previous owner in 1998 — we found the documentation in the deeds. The architect received a full structural schedule with all dimensions, load calculations, and a photographic record of every key junction.
What they built
A studio and reading room under the eaves
The inspection report became the first page of the architect's brief. It saved an estimated six weeks of back-and-forth and gave the project a confident foundation from day one.
"Our architect said she wished every client arrived with a Joists report. She's now recommending us to her other clients before they brief her."
Priya & James O., Crouch End
The process
Four steps from curiosity
to certainty.
Most homeowners spend months and thousands of pounds getting conflicting opinions from builders who want the job. A Joists inspection happens before any of that — so you walk into every conversation knowing the structural truth.
Book online in 2 minutes
Choose a morning that suits you. No call required. You'll get a confirmation with what to expect and how to prepare the hatch.
90-minute loft inspection
Your surveyor arrives, opens the hatch, and spends time up there with a torch, a tape, and twenty years of knowing what matters. You're welcome to listen from the ladder.
Written report within 48 hours
A plain-English document covering ridge height, rafter sizing, purlin positions, party wall obligations, and a clear structural verdict. No jargon. No hedging.
Brief architects with confidence
Walk into every subsequent conversation — with your architect, your builder, your planning officer — knowing exactly what the structure can carry.
Ready when you are
Stop guessing.
Find out what your loft can hold.
A qualified structural surveyor. A torch, a tape, and the knowledge to read what the timber is telling you. One honest report.
90-minute visit, written report within 48 hours, no obligation.
Covering London, Surrey, Kent, Essex, and the Home Counties
Registered surveyor
Fully qualified, insured, and regulated
Written report turnaround
Plain English, no hedging
Fixed inspection fee
No surprises. No retainers.








