Extension Feasibility
We map your actual plot from the title and aerial data, then work out which extension directions are physically and legally possible: single-storey rear, side-return, wraparound, double-storey, or an orangery as a softer step. Each viable option comes with a photo-realistic before/after of your house, the planning route (PD vs full application), the cost band, and the value uplift on a home in your bracket.
- I'm planning an extension this year
- I'm comparing rear vs side-return on this plot
- I want to brief an architect with real precedent in hand
Most parts land in minutes; full report including all visualisations within 24 hours. One-off payment. Price includes the 25% off for opting in to receive 3 vetted local quotes when your report is ready.
Visualised on your property
Rear, side-return and wraparound options for your plot, with planning verdicts.
You've been measuring the side return with a tape since September. The neighbour two doors down has a wraparound and the one across the road got refused for the same thing. You've drawn six versions on the back of a Booths receipt and you're still not sure which one your council will approve, or which one is worth the £80k it'll cost. The Extension Feasibility report puts every viable direction onto your actual plot, with photo-realistic before/afters, the PD-vs-full-application route, the cost band and the value uplift, all decided on the planning history of your specific street.
What you actually get
Six concrete things inside the report.
Not a generic guide. These are the specific deliverables we ship for your address, every single time.
Every viable extension option for your plot
Rear, side-return, wraparound, double-storey, orangery. We tell you which are physically possible, which fit your plot, and which the planners on your street tend to say yes to.
Photo-realistic before / after per direction
The rear of your house, rendered with each option dropped onto it. Same brick, same roofline, same garden. Useful for partner conversations.
Planning route, per option
Permitted Development with a Lawful Development Certificate, full planning application, or prior approval. With the specific PD limits that apply to your house type.
Street precedent in the last 5 years
Every extension approval and refusal within a few hundred metres, with addresses, what was built, and the pattern your council is most comfortable with.
Cost band per direction
UK design-and-build pricing for the size and complexity of each option, including the bits that hide (structural opening, party-wall awards, finishes).
Value uplift per direction
Comparable sales tell us what a well-done extension of this type tends to add to homes in your bracket. Some directions add more than they cost; some do not.
Built from this data
Grounded in the actual evidence of your property.
Every recommendation in the report ties back to one of these data streams. No generic Wikipedia summaries; no postcode averages.
Your title plan and plot geometry
The exact shape of your boundary, the side return if you have one, the depth available to the rear, and any easements that pin the plot.
Planning history within 500m
Every extension decision near you - approved, refused, withdrawn - decoded for patterns. The single biggest signal of what your council will accept.
Constraints on your plot
Conservation Area, Article 4, listed status, TPO trees, restrictive covenants. The legal facts that decide which directions are even on the table.
Your listing photos for visualisations
Used to render each viable option onto your real elevation so the before/after shots look like your house, not a generic brick semi.
What it looks like
A glimpse of the report itself.
The full report lands as a single scrollable page. Visualisations sit alongside the costs, planning verdicts and value uplift, so you can argue with it (or with your partner) in one place.
Visualisation for this property
Modern rear extension on a Victorian brick terrace with anthracite bifold doors opening to the garden.
The verdict (one sentence)
Rear, side-return and wraparound options for your plot, with planning verdicts.
Likely value uplift
Typically +£40k to +£120k
Cost & value
What it costs. What it adds.
Honest bands tuned to UK pricing in the last 12 months, plus a value uplift range for homes in your bracket.
Highly sensitive to direction. A well-done side-return on a Victorian terrace in a strong market often adds 2-3x its build cost; a rear bolt-on in a weaker market may only break even.
The fine print, up front
What this report does not cover.
A clear list of what we leave out, so you never feel short-changed when you open it.
- A pre-application written response from your council (we tell you what they have approved nearby; the council write-up is a separate exercise)
- Structural engineering calculations
- A guaranteed planning consent (no report can promise that)
If we can't make this report outstanding for your address, you don't pay.
If we can't find the photos, planning history or constraints we need to make this specific report genuinely useful for your house, we refund the full price before generating a single word. Same goes if you read it and it just doesn't deliver.
Asked often
The questions that come up before buying.
Articles & guides
Plain-English guides on extension feasibility.
Short, practical pieces written by humans who've sat in your seat. Use them to come back to the report with sharper questions.
- Guide8 min readComing soon
Rear, side-return or wraparound: which extension makes the most of this plot?
How plot shape, light and council appetite decide it.
Notify me when this is up - Guide7 min readComing soon
Permitted Development extension rules in 2026, in plain English
Limits, eaves, materials and the Article 4 trap.
Notify me when this is up - Guide6 min readComing soon
House extension costs in the UK in 2026: a real per-square-metre breakdown
What's hidden in a £2,500/sqm quote, and what isn't.
Notify me when this is up - Guide5 min readComing soon
Why neighbour precedent decides your planning application
How councils actually use 'comparable approvals' on your street.
Notify me when this is up
We're writing these now. The report itself is ready today; the guides are the long-form companion.
Other reports
Pair it with one of these.
Most buyers add a second report; many tip into the bundle. The cart at the bottom updates as you go.
£37£49
£26£35
£37£49Solar & Heat PumpSolar survey for your exact roof, plus a heat pump verdict for your house; the full energy story in one report.
£37£49Loft Conversion FeasibilityDormer, hip-to-gable or L-shape; what your loft can become and what it would cost.
£26£35Garden TransformationOutdoor living, lighting, structures and a garden room in your actual garden.
£26£35Driveway & FrontageDriveway, front door, render and planting; the whole street-side restyled for your house.
£29£39Windows & GlazingSash, casement, anthracite or heritage; every window on your house, rethought with the planning rules.
£29£39Roof PotentialRe-roof, restore the chimney, add a rooflight; what your roof needs and what it could become.
Get all 9 reports for £299.
Every report on this page, plus the brochure PDF, the planning history grid for your street, and comparable sales within half a mile. Saves £7 vs buying separately.
If you typed any of these into Google, you're in the right place.
Ready when you are