Single-Storey Extensions in Derby, Derbyshire

Single-Storey Extensions in Derby: how we approach the work

Our single-storey extension service in Derby starts with a measured survey of your house rather than a generic quotation. A ground-floor extension to the rear or side of the house — typically to create an open kitchen, dining and family space — with its own foundations, walls, roof, structural opening and services.

The technical crux on most Derby projects is foundation depth for the soil and nearby trees, the beam over the opening into the house, and drainage that often runs under the new footprint. We resolve these on paper first — with a structural engineer where the work needs one — and price the job on what is actually there.

Planning in Derby: Frequently permitted development for houses when depth, height and boundary limits are met; flats, listed buildings, conservation areas and houses with removed rights need an application. We check the constraints for your specific address, including any planning history, and tell you plainly which route applies before drawings are commissioned.

Why Derby homeowners use a local design and build team

We are a local design and build contractor, not a national lead-generation site. Derby is around 15 miles from Nottingham and inside our twenty-five mile working area, which means the same team that surveys your house is the one that designs it, prices it and builds it.

Cost is driven by footprint, ground conditions, opening width, flat versus pitched roof and rooflights and extent of internal re-planning. We do not publish a rate per square metre because it misleads more often than it helps; you receive an itemised, written fixed-price quotation after the survey so you can see what each element costs and what changes it.

We do not invent projects, reviews or statistics to fill a page. What we can promise is a written programme, weekly updates, building control certification handed over at the end, and a twelve-month defects period during which we return to put right anything that fails.

Planning permission in Derby: Derby City Council

The local planning authority for Derby is Derby City Council. Any application for your single-storey extension — householder planning permission, a lawful development certificate or prior approval — is submitted to Derby City and decided against its adopted local plan and national policy. Applications are made through the council's own planning pages or the national Planning Portal, where the current householder fee is published.

Frequently permitted development for houses when depth, height and boundary limits are met; flats, listed buildings, conservation areas and houses with removed rights need an application.

Permitted development: Work that stays inside the size, height, position and materials limits set nationally in the General Permitted Development Order needs no planning application. The limits are tighter on flats, on houses whose rights have been removed by a condition or an Article 4 direction, and on land in a conservation area, National Park or World Heritage Site.

Party walls sit outside the council process entirely. Not a council process at all: the Party Wall etc. Act 1996 is a private notice served on the neighbour when work affects a shared wall, cuts into it, or excavates near their foundations. It runs alongside planning and building control, and being told about it late is what usually delays a start on site.

Before anything is drawn we check your address for the things that change the route: whether permitted development rights have been removed by a condition or an Article 4 direction, whether the property is listed or in a conservation area, any earlier planning decisions on the site, and the position of boundaries and highways.

In practice the order is: constraints check → measured survey → design that fits the route we have identified → submission to Derby City where an application is needed. Where the work is permitted development we recommend applying for a lawful development certificate, because it is the document that proves the position to a future buyer's solicitor.

Building regulations and building control in Derby

Planning and building control are separate approvals. Even where your single-storey extension in Derby needs no planning application, the building regulations still apply, and the work has to be notified. For Derby that means Derbyshire Building Control Partnership, the joint service Derby City shares with other Derbyshire councils, or a registered building control approver of your choice. We make the submission and manage it for you.

Building notice: A shorter route for straightforward work: the job is notified and then inspected as it proceeds, with no prior plan check. Faster to start, but the risk of a change being required mid-build sits with the owner.

Foundation depth for the soil and nearby trees, the beam over the opening into the house, and drainage that often runs under the new footprint. Those are the elements building control looks at, alongside insulation and airtightness, fire safety and escape, ventilation, drainage, glazing, and the safety of electrical and any gas work.

Inspections happen at set stages rather than all at the end — typically excavation and foundations before concrete, drainage before it is covered, the structural frame or beams once installed, insulation and damp proofing before they are hidden, and a final inspection on completion. We book these and meet the inspector on site so nothing is buried before it is signed off.

At the end you are handed the building control completion certificate, structural calculations, electrical certification, gas paperwork where relevant, and any planning or lawful development documents. Keep them together: this is the pack a buyer's solicitor asks for when you sell.

The process, step by step

1. Site visit in Derby: we measure, look at the constraints — boundaries, drainage, structure, roof — and talk about what is not working in the house now.

2. Options and cost range: sketch options with an honest range, before detailed drawings.

3. Approvals: permitted development check, lawful development certificate or planning application as your address requires, plus building control submission.

4. Engineering and fixed price: structural calculations completed, then a written fixed-price quotation with a stage programme.

5. Build: roughly ten to eighteen weeks on site. Yes; the opening into the house is left until the extension is weathertight.

6. Completion: snagging closed out, building control completion certificate issued, defects period begins.

Types of single-storey extensions we take on in Derby

In Derby and the surrounding area we take on rear extensions, side infill extensions, kitchen-diner extensions, family rooms, utility and boot rooms and ground-floor bedroom and wet room extensions. Housing stock varies street by street across Derbyshire, so each project is designed for the actual house rather than adapted from a standard drawing.

Read the full Single-Storey Extensions guide for design options, planning rules and what drives cost.

Areas we cover near Derby

From Derby we also cover Spondon, Borrowash and Chellaston, and the wider Derbyshire area within roughly twenty-five miles of Nottingham. If you are just outside Derby, tell us the postcode and we will confirm.

• Single-Storey Extensions in Spondon
• Single-Storey Extensions in Borrowash

Talk to us about your Derby project

The useful next step is a conversation about your actual house. Call us or send a WhatsApp message and we will arrange a visit to Derby, look at the constraints properly, talk through the planning route for your address and follow up in writing with options and a realistic cost range.

Single-Storey Extensions in Derby: questions homeowners ask