New Windows in a 3-Bed House: Typical Specs and Budget Ranges

For a typical 3‑bedroom semi‑detached house in the UK, most homeowners are looking at replacing around 8–10 windows, with common uPVC double glazing budgets usually falling somewhere between roughly £4,000 and £7,000 depending on style, spec, and access.

Choices like sash vs casement, uPVC vs aluminium or timber, and whether you add bays or premium glass can push the total towards either end of that range.

What a “typical” 3‑bed semi looks like

Most standard 3‑bed semis have a broadly similar window layout, which is why so many price guides use them as examples.

You will usually see:

• Around 8–10 windows in total, sometimes up to 12 if there are bays or extra side elevations.
• A mix of downstairs lounge and kitchen windows, upstairs bedroom and bathroom windows, and sometimes a landing or stair window.
• Mostly standard casement openings, with the occasional bay window on the front elevation in some South Yorkshire streets.

This is the sort of house where a full replacement can often be done in 1–3 days by an experienced fitting team, depending on access and any remedial work needed.

Common spec choices for new windows

The most popular specification for a 3‑bed semi is modern, energy‑efficient uPVC double glazing with standard casement openings.

Typical choices include:

• Frame material
  • uPVC as the default, balancing cost, performance, and low maintenance.
  • Aluminium for slimmer frames and a more contemporary look, at a higher price point.
  • Timber for period properties or conservation‑style homes, usually the most expensive option.
• Glazing and performance
  • Modern double glazing with low‑E coatings and argon‑filled units to reach good energy ratings.
  • Optional upgrades like laminated or toughened glass, noise‑reduction glazing, and trickle vents for ventilation.
• Styles and extras
  • Casement windows as standard, with tilt‑and‑turn or vertical sash as premium alternatives.
  • Optional bays, decorative glazing, or colour‑foil frames to match existing doors and fascias.

Budget ranges you can expect

Headline prices vary, but recent UK cost guides broadly agree on the sort of budgets involved for a 3‑bed house.

Indicative ranges:

• uPVC double glazing
  • Roughly £4,000–£7,000 for a full house of around 8–10 windows, depending on styles and any bay windows.
  • Per‑window guide prices for uPVC casements often run in the low hundreds for smaller sizes, into the high hundreds for larger or more complex openings.
• Aluminium windows
  • Often around 30–60% more than equivalent uPVC for a full house, with many Aluminium window examples falling in the £7,000–£10,000 band for a 3‑bed semi.
• Timber windows
  • Frequently double uPVC‑level budgets, so totals of £10,000–£16,000 or more for a full 3‑bed house are not unusual where you want high‑quality timber frames.

Labour is usually wrapped into “supply and fit” prices, but separate guides suggest a 10‑window house in uPVC can attract fitting costs of around £600–£1,000 as part of the total.

Factors that push your budget up or down

Two seemingly similar 3‑bed semis can have very different window budgets once the details are pinned down.

Key influences include:

• Number and type of windows
  More windows, big bays, or lots of sashes will simply cost more than a simple layout of standard casements.
• Access and installation complexity
  Scaffolding, difficult rear access, very high openings, or structural alterations around old frames will all add to the bill.
• Spec and finish
  Colour‑foil frames, premium hardware, acoustic or laminated glass, and triple glazing all push costs higher than basic white uPVC double glazing.
• Region and installer
  Prices can vary by area and by company, so it is always worth getting multiple local quotes and checking exactly what each one includes.

How to use these ranges when planning a project

For homeowners in a standard 3‑bed semi in South Yorkshire, a sensible starting assumption for good‑quality uPVC double glazing is a mid‑range budget of around £4,000–£6,000 for 8–10 windows, with plenty of room either side for simpler or more premium specs.

Once you know your window count, preferred styles, and any must‑have upgrades, detailed written quotes from local installers will help you refine that ballpark into a firm project figure.