West Cornwall · TR26 · Cornwall Council West
Extensions for Lelant (TR26)
Extensions are the bread and butter of Cornish homes — adding the kitchen-diner the original layout never had, the bedroom for a growing family, or the light and views the back of the house should always have had. The way we approach extension in Lelant starts with a measured walk-round — Lelant is the AONB estuary village south of St Ives, with a Norman church on the dunes, the West Cornwall Golf Club and one of the most stable period property markets in West Cornwall, with a building stock that leans toward modern carefully detailed coastal replacements and 1930s detached houses.
Lelant sits in West Cornwall — just off the A30; covering TR26 from Carbis Bay, St Ives, Hayle outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓One studio — design, planning and build under one roof
- ✓Local to West Cornwall — not a national franchise
- ✓Measured-survey accuracy from day one
- ✓Fixed-fee planning packages, no surprise invoices
Free · No obligation
Free Lelant feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Page purpose
Drawings only, or drawings through to handover in Lelant?
Both routes are open on a TR26 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Lelant clients take the drawings, tender them locally, then come back to us for the build if the numbers do not stack up.
- Route one: feasibility, planning and a tender-ready technical pack
- Route two: the same pack, then the build under one contract
- Either way the survey and feasibility work is identical, so the decision can wait
- Fees quoted per stage against the TR26 scope, not as one opaque figure
Scope
Scope options for Lelant clients
Clients in Lelant take different slices of this list, and that is deliberate.
Full design and build
One contract from first sketch to handover, with the same team on paper and on site.
Construction and technical drawings
1:10 and 1:20 details for the parts of the job builders normally have to guess at.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Planning application drawings
Existing and proposed plans, elevations, site and block plans drawn to validation standard.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
Local watch-list
Local snags worth knowing before drawing a Lelant extension.
Watch #1
Conservation Area controls on materials, window proportions and roof form through central Lelant
Watch #2
AONB landscape-impact testing on anything read in long views across West Cornwall
Watch #3
Exposure detailing on Edwardian villas above the estuary — fixings, render systems and joinery specified for salt-laden air
Who this is for
Straight facts about working with us here
- Applications for Lelant are handled through Cornwall Council, with Truro the nearest planning office we deal with regularly.
- Designated-area work is routine here, so heritage and landscape statements are produced alongside the drawings rather than outsourced.
- Drawings, planning and building regulations are all produced in-house, so a extension enquiry does not get passed between firms.
Planning rules change and every site is different. For the final position on your address, check with Cornwall Council as the local planning authority or the Planning Portal.
What we focus on
Extensions considerations specific to Lelant.
01
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
02
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
03
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
04
Permitted development for rear extensions runs to four metres on a detached house, three on a semi or terrace — but Article 4 areas remove this in some parishes.
Quick check
Want a straight answer on whether your Lelant project is worth pursuing?
Send a few details — we'll come back within 1 working day with a plain-English view on planning risk, likely cost band and whether it's a project we'd take on.
Free · No obligation
Get a free feasibility view
For projects in Lelant and the TR26 area.
Local context
Why Lelant is its own job.
In Lelant the planning picture is specific: conservation Area covers the village core and church; AONB across the parish. Estuary views and the Hayle estuary SSSI shape applications on the eastern edge of the village. For extension specifically, parts of Lelant sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape; the surrounding landscape falls inside the Cornwall Area of Outstanding Natural Beauty, so massing, height and landscape impact carry extra weight in any planning decision; coastal salt-laden air around Lelant drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That local reading is what makes a Lelant (TR26) project different from a generic Cornwall scheme — and is the whole reason we work this way. On modern carefully detailed coastal replacements in particular — the kind you'll also find toward St Ives — the extension brief always has to read the existing fabric first.
Planning note
Most extensions in Cornwall are either permitted development or a straightforward householder application — but Conservation Area and AONB sites need a more careful design conversation upfront.
Our process
How a Lelant extension project runs.
Step 1
Brief
We meet on site, talk through how you live now and what's missing from the current layout.
Step 2
Design
Two or three sketch directions with rough budgets, then refinement of the chosen route.
Step 3
Approvals
Planning or Cert of Lawfulness, then a full building regs package.
Step 4
Build
Either through your own builder with our drawings, or as a full build by our team.
Step 5
Handover
Snag, certify, hand over the keys to your new space.
Typical single-storey rear extensions run twelve to twenty weeks on site; two-storey and wraparound projects sixteen to thirty weeks.
FAQs
Lelant Extensions — local questions answered.
- What about the Party Wall Act?
- If you share a wall with a neighbour or build close to a boundary, the Act applies. We flag it early, recommend a surveyor and keep the programme aligned with the notice period. In Lelant specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- How much does an extension cost in Cornwall?
- Build costs in Cornwall typically run from around £2,200 to £3,200 per square metre for a good-quality single-storey extension, more for kitchen-grade fit-out or complex glazing. We give a realistic budget before drawings start, not after.
- Can you handle the build as well as the design?
- Yes — that's the whole point of the studio. One contract, one point of contact, no finger-pointing between architect and builder when something needs a decision on site.
- We live in the house. Can a extension in Lelant be done while we stay put?
- Usually yes for single-storey and rear work, with a temporary kitchen or bathroom arrangement agreed before the start. Whole-house remodels and roof work in Lelant are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- How long does the whole process take?
- Allow roughly three months for design and approvals, then twelve to twenty weeks on site for a typical single-storey extension. Wraparounds and two-storey add-ons take longer, mostly through approval and groundworks.
- Do I need planning permission for an extension?
- Often no — single-storey rear extensions, side extensions and modest two-storey additions can sit inside permitted development on a typical detached house. Conservation Areas, AONB and Article 4 zones remove some of those rights, so we always check the address first.
Lelant is part of Carbis Bay
Lelant sits inside the Carbis Bay catchment — we cover both as one extension territory.
See Extensions in Carbis Bay →Keep reading
Where to go next from Lelant
Lelant is covered from our Carbis Bay run. Being a smaller place, the local detail matters more than the headline policy: lane access, neighbour proximity and what the immediate street already looks like.
Other services in Lelant
Nearby places we cover
If you're balancing ambition against TR26 planning realism, our Lelant extension work threads that needle without the usual drama. For the final position on any address, Cornwall Council or the Planning Portal is the place to confirm it.
Pencil in a free Lelant visit this week We are on the A30 regularly.
Free · No obligation
Book a free visit in Lelant
No obligation. Reply usually same working day.