Extensions & Renovations
Extensions and renovations are the majority of what we do. Kitchen extensions, second-storey additions, full-house renovations, period property work. The discipline of working with an existing building, getting levels right, matching brick or render, sequencing trades around what's still being lived in, is its own craft.
We are happy on jobs from £50,000 single-room extensions through to £400,000 full-house renovations. The process is the same: a conversation, a design, an itemised quote, a programme, and a team on site every working day until handover.
Homeowners adding meaningful living space or fundamentally improving an existing property, kitchen extensions, second-storey additions, full renovations, period property work.
Configurations and options
Single-Storey Rear Extension
The most common form. Open-plan kitchen-living-dining, usually rear or side-return, with a lantern or pitched roof.
- Bi-fold or sliding glazed wall
- Underfloor heating on the new slab
- Typically 25-50m²
Two-Storey Side Extension
Living or kitchen below, additional bedroom and bathroom above. A substantial visual addition to the house.
- Matched or contrasting external materials
- Full structural and thermal upgrade
- Often combined with internal rework
Loft Conversion
Bedroom or office in previously unused roof space. Dormer or hip-to-gable depending on the existing roof form.
- Structural rework of joists and rafters
- New staircase from the floor below
- Fire safety upgrades through the house
Full House Renovation
Stripping back to the structure and rebuilding the inside. Often combined with an extension.
- Re-wire, re-plumb, re-plaster
- Insulation upgrades to walls and roof
- New kitchen, bathrooms, joinery and finishes
Period Property Restoration
Sympathetic work on listed and pre-1919 buildings. Lime mortar, breathable build-ups, careful detailing.
- Lime render, lime plaster, lime mortar
- Conservation officer liaison
- Traditional joinery to match existing
What we use
Masonry
Block-and-skin construction matched to the host house, brick, render, or local stone, built by our own bricklayers.
Timber Frame
Where speed on site and high insulation values matter, a closed-panel timber frame is often the right answer for an extension.
Steel
Goalpost frames, ridge beams and pad-stones where openings into the existing house demand them. Specified by a structural engineer.
Roofing
Slate, clay tile, lead, single-ply membrane or EPDM on flat sections, matched to the original house wherever possible.
Glazing
Double or triple glazed thermal-break frames, specified per elevation for U-value, g-value, and acoustic performance.
Typical pricing
From £50,000
Subject to specification and site conditions.
Currently quoting
Spring 2027
Lead times updated quarterly.
Examples of our extensions & renovations
Genuine examples, all our own work.
What we don’t do
We do not take on jobs where we are clearly the wrong builder. If a project is mostly structural steel and minimal joinery, there are firms better suited to it than us. We say so.
Things people ask us
What is the current lead time to start on site?
Lead times vary through the year. Single-room extensions usually book 4-6 months out; full renovations 6-9 months. The current figure is shown in the panel above and updated as our diary moves.
Do extensions need planning permission?
Some single-storey rear extensions fall under Permitted Development; two-storey, side, and front extensions almost always need full planning. We handle the application as part of the design service.
How does Building Control approval work?
We submit a full plans application before starting on site, and the Building Control Officer inspects at key stages, foundations, damp course, drainage, frame, insulation, completion. The completion certificate is part of what you receive at handover.
Do I need a Party Wall agreement?
If the extension is within 3 metres of a neighbour's structure, or excavates within 6 metres at a depth greater than their foundations, a Party Wall Notice is required. We flag this early and recommend a Party Wall surveyor where needed.
Can we live in the house during the build?
Often, yes, especially for rear extensions where the existing kitchen and bathrooms stay operational for most of the programme. Full renovations and second-storey additions are usually easier with the family moved out for some or all of the works. We will be honest about which weeks are likely to be disruptive.
Is VAT charged on the work?
Most domestic extension and renovation work is standard rated (20% VAT). Specific elements, listed building consent works, conversions of non-residential to residential, energy-saving materials in some cases, can fall into reduced or zero rates. Our quote breaks it down clearly.
What insurance do you carry?
£5 million public liability, £10 million employer's liability, and contract works insurance covering materials on site. Certificates available on request before contract.
What is NOT included in a typical extension quote?
Unless explicitly listed: kitchen units, sanitaryware, white goods, light fittings, soft furnishings, decoration of existing rooms outside the works area, and planning or Building Control fees. Our quotes itemise inclusions and exclusions in plain English, no buried surprises.
Thinking about a project?
Tell us what you have in mind. We aim to respond within one working day.