Home Extensions in Stockport,Built to Add Space,Light & Long-Term Value.

Risks of cutting corners

• Cracking and movement caused by undersized foundations on Stockport's mixed clay-and-sandstone subsoils.
• Cold bridging and condensation where insulation, glazing and roof junctions have been detailed by a generalist rather than a specialist.
• Planning enforcement notices when permitted development limits are misjudged — particularly common on rear extensions in conservation areas like Bramhall village.
• Leaking flat roofs within 3–5 years from cheap single-ply or felt systems applied without proper falls and upstands.
• Drainage failures and Building Regs sign-off refusals when soil pipes and surface water haven't been routed correctly from day one.

Common homeowner mistakes

• Choosing the cheapest quote without comparing what's actually included (foundations depth, steel sizes, glazing U-values, decoration).
• Letting the architect design in isolation without builder input on buildability and cost.
• Skipping party-wall agreements with neighbours and getting served an injunction halfway through the build.
• Using domestic-spec bifold doors on a south-facing aspect with no solar control and watching the room overheat all summer.
• Believing that 'project managing it yourself' will save money — it almost never does.

01

Free Site Survey

Lewis attends in person to measure, assess constraints and understand what you actually want — not what's easiest for us to sell.

02

Design & Fixed Quote

Once we've fully scoped the work on site, you receive an itemised, fixed-price quotation with drawings or specification sheets where required. Larger projects take longer to price properly — never a vague allowance.

03

Planning & Approvals

We handle planning applications, building regulations, party-wall notices and structural drawings end-to-end.

04

Build Phase

One accountable team on site, daily progress updates, protected work areas and a tidy site every evening.

05

Sign-Off & Guarantee

Full walk-through, snagging completed before invoice, and your personally backed workmanship — Lewis returns to put right anything that isn't right issued on handover.

Home Extensions — recent project photos.

A small selection of completed home extensions work delivered by Greenbank across Stockport and Cheshire.

01

Fixed price, no surprises

Itemised quote held for the duration of the build. Variations only with your written approval.

02

Planning handled for you

We deal with the council, building control and party-wall surveyors. You sign three things, that's it.

03

Built for energy efficiency

Insulation, airtightness and glazing specified to outperform current Part L — your bills don't go up.

04

One accountable team

Lewis on site, the same trades from start to finish. No subcontractor handoffs, no finger-pointing.

05

Tidy, considerate site

Dust protection, daily clean-down, and respect for the rest of the house you still have to live in.

06

Workmanship we stand behind

In writing. Backed by a company that's been trading in Stockport for more than a decade and isn't going anywhere.

01

Types of extension we build

We design and deliver every common extension type in the Stockport area:

• Single-storey rear extensions — the classic open-plan kitchen-diner, typically 3–6m in projection.
• Side-return infills — turning a Victorian or Edwardian terrace's wasted side alley into usable floor area.
• Wrap-around extensions — combining rear and side returns for maximum ground-floor footprint.
• Double-storey rear and side extensions — adding bedrooms above living space in one build.
• Over-structure builds — adding a first floor above an existing single-storey extension or garage.
• Orangeries and glazed link extensions — for clients wanting heritage character with modern performance.

02

Foundations and structure

Stockport sits on variable ground — Mersey Valley alluvium, Bunter sandstone outcrops and pockets of made ground. We routinely specify trench-fill or reinforced raft foundations to between 1.0m and 1.8m depending on subsoil, proximity to trees and any heave risk. Steel beams (UC and UB sections) are calculated by an independent structural engineer for every project — never sized by rule of thumb.

03

Glazing and rooflights

We specify aluminium bifold and slim sliding doors with thermally broken frames, double-glazed units with argon fill and warm-edge spacers as standard, triple glazing where orientation or budget warrants. Rooflights are flat-glass, thermally broken units with kerb upstands — never plastic domes.

04

Roofing on extensions

Flat roofs are warm-roof construction with PIR insulation above the deck and a single-ply membrane (Sarnafil or equivalent) or high-grade GRP — never pour-and-roll felt. Pitched extensions use breathable membranes, ventilated battens and matching tiles sourced as close to the host roof as possible.

05

Heating and electrics

All extensions are wired to current 18th Edition standards with RCBO protection. Underfloor heating is our default for ground-floor extensions — quieter, more comfortable and frees the walls for furniture. Existing boilers are checked for capacity before connection, and upgraded if undersized.