North Cornwall · PL34 · Cornwall Council North
Single storey extension costs in Tintagel, and what actually moves the number
A single storey rear or side extension is the most common brief we take in Tintagel, and the cost gap between two apparently identical projects usually comes down to four things: how the ground behaves once it is opened up, how much glazing is in the rear elevation, whether the kitchen is being reworked at the same time, and how exposed the elevation is to weather coming off the sea, which drives the weather-tightness detailing. 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 Tintagel version of this work has its own character — Tintagel sits above a famously dramatic stretch of north coast cliff, with the medieval and Arthurian-associated castle on its headland and a Conservation Area covering the village centre, with a building stock that leans toward Victorian guesthouses and modern coastal new builds and replacements.
Tintagel sits in North Cornwall — just off the A39; covering PL34 from Boscastle, Delabole outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- Rural / open-countryside policy area
- ✓Cost banded feasibility before any design fee is committed
- ✓Tintagel ground and access assessed on the first visit
- ✓Drawings and build from one studio, so the detail is priced not guessed
- ✓Free first consultation across North Cornwall
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Free Tintagel feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Our process
How a Tintagel 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.
Local proof — We typically have one or two extension jobs live in the PL34 area at any time, so the local planning officers know our drawings on sight.
Get a free feasibility viewScope
The parts of the job we can take on in Tintagel
Not every project needs every stage. On a Tintagel job we scope to what the site and the consent route actually require.
Structural coordination
Calculations coordinated with the drawings so building control sees one consistent story.
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.
Who this is for
What we can genuinely back up in Tintagel
- Design and build are offered from the same studio, which means the person answering your Tintagel questions has seen the detail built.
- Drawings, planning and building regulations are all produced in-house, so an extension enquiry does not get passed between firms.
- Designated-area work is routine here, so heritage and landscape statements are produced alongside the drawings rather than outsourced.
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.
Keep reading
Other work we do around Tintagel
Tintagel works as a hub for us: the same extension team covers Camelford and the surrounding PL34 villages, so a site visit here often takes in more than one address.
Page purpose
Drawings only, or drawings through to handover in Tintagel?
Both routes are open on a PL34 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Tintagel 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 PL34 scope, not as one opaque figure
Quick check
Want a straight answer on whether your Tintagel 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.
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Get a free feasibility view
For projects in Tintagel and the PL34 area.
What we focus on
Extensions considerations specific to Tintagel.
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
Extensions over a certain proportion of the original house trigger full Part L upgrade obligations to the existing building — worth knowing before brief is set.
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.
Local context
Why Tintagel is its own job.
Around Tintagel (PL34), conservation Area covers the village; AONB and Heritage Coast across the parish. English Heritage and historic landscape considerations weigh on village-edge schemes. For extension specifically, parts of Tintagel 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 Tintagel drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure; Cornwall Council's Local Plan applies tighter tests to isolated rural dwellings here, so design rationale and policy fit need to be set out clearly from the outset. Reading Tintagel properly up front saves more time than any drawing tool ever will. Most of our extension work in Tintagel lands on Victorian guesthouses, with detailing that has to nod to the wider Delabole streetscape. Historic fabric changes the sequence: survey first, then design around what the building can take. Consent routes for listed buildings sit separately from ordinary planning, so treat any general guidance here as a starting point and check with Cornwall Council. Coastal sites tend to raise questions about roof form, glazing exposure and how a scheme reads from public viewpoints. Those are policy judgements rather than fixed rules, so the local planning authority or the Planning Portal should confirm the position for a given plot.
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.
Local watch-list
The PL34 constraints that shape an extension brief.
Watch #1
Conservation Area controls on materials, window proportions and roof form through central Tintagel
Watch #2
AONB landscape-impact testing on anything read in long views across North Cornwall
Watch #3
Exposure detailing on slate cottages — fixings, render systems and joinery specified for salt-laden air
Watch #4
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around Tintagel
Tintagel is the hub for these neighbourhoods
We run extensions across Tintagel and the surrounding PL34 neighbourhoods — same studio, same site team.
- Camelford
PL32
Local fabric
What sets a Tintagel extension brief apart.
Building stock
Across Tintagel (PL34) we work on slate cottages, Victorian guesthouses, 1960s estate housing, modern coastal new builds and replacements. Each stock type drives a different extension response — Victorian guesthouses in particular needs careful detailing here.
Parish & policy
Tintagel is its own town in North Cornwall, with planning history that's specific to the PL34 catchment.
Coverage
We cover PL34 from our studio, with regular extension jobs also running in Camelford. Most Tintagel site visits get booked within the same week.
Do you work in Tintagel regularly?
Yes — Tintagel and the wider PL34 catchment are core territory. We're typically on a North Cornwall site at least once a week, so logistics are baked in, not bolted on.
Request a free visitWho this is for
In Tintagel the extension brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
FAQs
Tintagel Extensions — local questions answered.
- What drives the cost of a single storey extension in Tintagel?
- Ground conditions, glazing area, structural openings into the existing house, drainage runs and access for materials. In Tintagel (PL34) access is often the quiet one, because a site a lorry cannot reach is a site where everything is handled twice.
- Is a rate per square metre reliable?
- Only as a sanity check. Two extensions of the same size can differ by a third once you change the glazing spec, the roof form and the amount of existing structure being altered. We price from drawings, not from a rate.
- Does using one studio for drawings and build change the cost?
- It changes where the cost is certain. Because we draw the scheme and then build it, the detail that a separate builder would price as a risk is already resolved on paper, so there is less contingency priced into the unknowns.
- What is the cheapest way to add space in Tintagel?
- Usually reworking what already exists before extending: a garage conversion, a rethought internal layout, or a smaller extension that unlocks a better plan. We will say so if that is the better answer for your house, even though it is a smaller job for us.
- How much does an extension cost in Tintagel?
- 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. In Tintagel specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- We live in the house. Can an extension in Tintagel 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 Tintagel are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- 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.
Other services in Tintagel
The honest answer for Tintagel is that a rate per square metre is a starting point, not a price. We give you a cost band at feasibility stage, then a real figure once the drawings exist and the work can be priced properly.
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