CASE STUDIES
The intelligence no one else provides
Real properties. Real decisions. Real money. The analysis that closed information gaps before they cost the buyer, the owner, or the project.
CASE STUDY
The Extension That Nearly Doubled
The Situation
Emma and David found their "forever home" — a Victorian terrace in North London needing a rear extension and loft conversion. Their architect suggested £150,000 would cover it. They were ready to exchange.
The BuildLens Analysis
The Hidden Factors
➝ Structural movement: Original rear wall showed signs of historic settlement and additional work was required.
➝ Party wall complexity: Party wall required repairs and there was no party wall fire break in loft space between the houses.
➝ Floor structure: 1890s joists inadequate for open-plan loading without additional reinforcement
➝ Drainage conflict: Existing run conflicted with proposed extension footprint
The Decision
Emma and David didn't walk away. They renegotiated the purchase price down £45,000, secured a larger mortgage in advance, and phased the loft conversion to year two.
The Money Maths
➝ Build Cost Intelligence Enhanced report: £395
➝ Build Cost Gap uncovered : £147,000
➝ Return on report spend: 372 times
➝ Additional defects and costs revealed prior to starting works
"We'd have run out of money and left with a partly done house. BuildLens meant we went in with our eyes open."
— Emma, North London
CASE STUDY
The Flat That Looked Finished
The Situation
A first-time buyer couple had their offer accepted on a one-bedroom flat in South London at £600,000.
The listing described the property as "finished to a really high standard" with "a private garden" and "unique character." They had five days before exchange of contracts. Buyer's remorse had set in and they could not explain why.
The L4 survey came back with 48 pages of condition commentary and exclusion language, no cost figures, and a recommendation to "consult a specialist for costings."
The mortgage was approved. The solicitor was waiting on their instruction to proceed.
What The BuildLens Analysis Revealed
The Prescription report cross-referenced the listing photos and analysed defects and condition, the Land Registry transaction history, EPC data, and comparable sales within a half-mile radius against the £135M+ dataset of completed residential project invoices. The fit-out cost analysis produced the following finding.
What the Photos Showed
➝ The visual defects scan flagged three specific concerns the listing photos inadvertently revealed.
➝ Repainted patch on the hallway ceiling, consistent with historic water ingress from the flat above, covered rather than remedied
➝ Fresh skirting and architrave in the bedroom matching no other room — damp treatment and re-plastering behind
➝ Garden wall lean visible in the exterior photograph — party structure issue with the neighbouring property
The Decision
The buyer used the Prescription report as the evidence basis for a renegotiation. They offered £540,000 on a take-it-or-leave basis with the report appended to the offer letter. The seller accepted within 48 hours. The buyer saved £60,000 against the original offer and entered completion with every structural concern pre-priced.
The Money Maths
➝ Homebuyers Prescription report: £449
➝ Price reduction saving achieved: £60,000
➝ Return on report spend: 133 times
➝ Against the £2,800 an L4 survey cost — with no numbers, no offer guidance, no real defects pricing
"We were going to exchange on the Friday. The report came back on the Wednesday. We would have overpaid by sixty thousand pounds on our first home. The asking price was a performance. The data from Buildlens was the truth."
— N & A, First-Time Buyers, South London
CASE STUDY
The House That Would Not Move
The Situation
A three-bedroom semi in Hertfordshire was listed at £650,000 in the spring.
Four months later, no offers.
The listing had thirty-two saved views and fewer than ten enquiries.
The estate agent suggested a £40,000 price reduction to "stimulate interest."
The owner, who needed the sale to complete an onward purchase, was days away from agreeing.
What The BuildLens Analysis Revealed
Owners Prognosis established that the asking price was defensible on square footage and location. Comparable sales within a mile supported £640,000 to £665,000 for properties in equivalent condition. The listing was not overpriced. It was under-presented.
What the Report Recommended
➝ Kitchen cabinet door replacement and worktop refresh — £6,800
➝ Bathroom re-tile and fixtures refresh — £7,200
➝ New carpet to main bedroom, professional staging photographs — £4,500
➝ The analysis flagged that a £40,000 price reduction would realise £610,000. A £18,500 refresh investment targeting the presentation gap would protect the £650,000 asking and was statistically likely to close within the postcode average time frame.
The Decision
The owner withdrew the listing, completed the refresh over four weeks, and relisted at £650,000. The property received fourteen viewings in the first ten days and sold for £642,000 six weeks after relisting.
The Money Maths
➝ HomeOwners Prognosis report: £249
➝ Refresh investment: £18,500
➝ Final sale price: £642,000
➝ Final sale price: £642,000
➝ Net gain by choosing data over the price cut: £13,251
"The agent wanted me to reduce the price by forty thousand pounds. The report said the price was right and the photographs were wrong. Two hundred and forty-nine pounds to tell me I was about to give away my onward move deposit."
— L, Homeowner, Hertfordshire
CASE STUDY
The Project That Stayed On Budget
The Situation
Rachel, an IT manager by profession, approached her 1930s semi extension differently. Before instructing an architect, she ordered a BuildLens Full Spectrum Report based on her outline ideas and property photos.
She wanted real numbers before she had anything to negotiate against — not after quotes started coming back and she was already emotionally committed to a design.
What The BuildLens Analysis Revealed
The Full Spectrum Build Cost Intelligence Report cross-referenced Rachel's outline plans and property photos against the Buidlens dataset of completed residential projects.
Because the property was post-1920 construction with good access and no obvious structural red flags, the report was able to produce tight cost ranges rather than broad estimates.
What Happened
Rachel set her budget at £140,000 based on the report's upper range plus a small personal buffer.
She used the report as her negotiation position with three contractors.
Two of them revised their initial quotes downward when presented with the BuildLens data. She appointed the contractor whose pricing aligned most closely with the report and whose responses to the cost breakdown showed genuine engagement rather than defensiveness.
Final project cost: £134,200.
Delivered on time. Delivered under budget. No mid-project surprise quotes, no emotional renegotiations, no specification compromises to hit a number.
The Money Maths
➝ Build Cost Intelligence Full Spectrum report: £975
➝ Budget set with confidence: £140,000
➝ Final cost delivered: £134,200
➝ Saved against personal buffer: £5,800
➝ Return on report spend: 19 times
"We'd have run out of money and left with a partly done house. BuildLens meant we went in with our eyes open."
— Emma, North London