Backland Development
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Build a new home in your garden in Penzance

For a garden in Penzance to take a new house, three things have to line up: a safe way in, enough space to keep both homes private and light, and services that can reach the plot at sensible cost. Our free appraisal looks at all three before you spend anything.

If they line up, we move on to a measured survey, design and, where useful, pre-application advice from Cornwall Council. Planning permission is the council’s decision, so the design is shaped around the tests its officers apply rather than the largest house the plot could possibly hold.

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Timber-frame house under construction with scaffolding at the bottom of a back garden, seen from the patio
Planning authority
Cornwall Council
Postcodes
TR18, TR20
Noon sun, 21 March
About 40°
Shadow from a 5 m eaves line
About 6.0 m
Planning plan
Local Plan
County
Cornwall

The local picture in Penzance

Daylight is one of the first things Cornwall Council will check on a garden house. At midday on 21 March the sun in Penzance stands roughly 40° above the horizon, so an eaves line about 5 m high casts a shadow of around 6.0 m. On 21 December the sun is only about 16° up and shadows stretch far longer.

That’s why the gap between your house and the new one, and the height of the new roof, are set by measurement rather than guesswork. A lower eaves line, a hipped roof or a single-storey section can make a real difference to the gardens either side.

Section showing noon sun and shadows in Penzance: about 40 degrees on 21 March and 16 degrees on 21 December21 m21 Mar, noon: sun 40°, shadow 6.0 m21 Dec, noon: sun 16°, shadow 16.9 mExistingNew home
Noon sun in Penzance on 21 March sits about 40° above the horizon, so a typical two-storey eaves line (about 5 m) throws a shadow of roughly 6.0 m. In December the sun is only about 16° up and shadows stretch much further. Drawn for a garden facing north, where it matters most.

The next steps, locally

Getting started in Penzance takes one step from you: send your address and a few photos of the garden, or call us. We check the title plan, access and planning constraints from our desk, then talk the plot through. If it looks viable we arrange a visit, discuss whether you want to sell, let or keep the new home, and set out the survey and design stage in writing before you commit.

  1. Free plot appraisal

    We check the title plan, access, constraints and planning policy from our desk, talk the plot through with you, and visit if it looks viable. There’s no cost and no obligation.

  2. Survey and design

    A measured survey records levels, boundaries, trees and neighbouring windows. We then design a layout and house that suit the plot, the street and your budget, and decide whether pre-application advice is worth seeking.

  3. Planning and approvals

    We submit the planning application and manage it to a decision, then deal with conditions, Building Regulations approval, the structural warranty, any build-over agreement and the new utility connections.

  4. Written quote and build

    Once design and survey are complete you get a written quote. The build runs in stages — access and groundworks, foundations, frame and roof, fit-out and external works — with inspections at each key point.

Worth checking early

  • A build next door means months of noise, deliveries and contractors near your home; good planning reduces the disruption but doesn’t remove it.
  • Planning can be refused, and money spent on surveys, design and the application isn’t recovered if it is — which is why we start with an appraisal.
  • Your own garden gets smaller and the new home will be visible from your house, so screening and separation matter for both homes.

Your questions, answered for Penzance

Who decides planning for a garden house in Penzance?

Cornwall Council decides applications for addresses in Penzance, using the council’s Local Plan, national policy and its own design guidance. Neighbours and consultees such as highways officers can comment, and the decision is made by the council’s planning officers or, where the rules allow, its planning committee. Pre-application advice from the council can help test a scheme before the formal application is submitted.

Will I pay Community Infrastructure Levy on a new home in Penzance?

Only if Cornwall Council has adopted a Community Infrastructure Levy charging schedule; not every council has. Where it applies, it can be charged on a new home of any size. A self-build exemption exists for people building a home to live in, but it must be claimed before work starts, so we check the position at design stage.

Do new homes in Penzance need a structural warranty?

If the house will ever be sold or mortgaged, in practice yes. Mortgage lenders usually expect a 10-year structural warranty on a new home, though some accept an architect’s or surveyor’s certificate, and a warranty provider inspects the work at stages during the build, so it has to be in place before construction starts. Building control approval is separate and also required; a buyer’s solicitor will ask for both.

How long does planning take for a new home in a Penzance garden?

The statutory period for deciding a minor application, such as a single new home, is 8 weeks from the date the council receives a valid application, in both England and Wales. In practice many applications take longer, and the council may ask you to agree an extension in writing. Surveys and design before submission add time, and conditions may need approving afterwards.

Other options in Penzance

Build in your garden near Penzance

Find out what your garden could become

Free garden plot appraisal. No cost, no obligation, and a straight answer if it won’t work.

Get my free appraisal 0800 088 6248