Commercial Windows

Commercial windows have to do a lot at once: keep interiors warm in winter and cool in summer, exclude noise, resist intruders, and look right for the building — all while standing up to years of use. Lord Glazing supplies and installs commercial windows across London in aluminium and uPVC, with double and triple-glazed insulated units, for offices, schools, hospitals, retail premises and hospitality venues. Whether you are replacing tired, draughty windows or specifying glazing for a refurbishment, we deliver energy-efficient, secure, compliant windows that perform. With 15+ years' experience, 5,000+ projects and a 4.9-star rating from 200+ reviews, we are London's dependable commercial glazing partner.

Why choose commercial windows from Lord Glazing

Old commercial windows quietly waste money — leaking heat, admitting noise and offering poor security. Modern insulated units with low-E coatings and thermally broken aluminium or multi-chamber uPVC frames slash heat loss, reduce energy bills and improve comfort and acoustics. The right glazing also enhances security, supports your sustainability targets and lifts the appearance and value of the building. Every window we install meets current Building Regulations, uses safety glass to BS EN standards where required, and can incorporate Part Q security performance.

As a FENSA registered, GGF member, TrustMark approved and Checkatrade verified installer that is fully insured, we deliver windows with documented compliance and a 10-year guarantee.

Key benefits

• Energy efficiency — low-E double and triple glazing cuts heat loss and bills.
• Acoustic comfort — laminated and acoustic units reduce traffic and street noise.
• Enhanced security — multi-point locking and Part Q-rated options.
• Durability — aluminium and uPVC frames built for commercial longevity.
• Improved appearance — slim sightlines and any RAL colour finish.
• Minimal disruption — phased and out-of-hours fitting for occupied buildings.

Options & specifications

• Thermally broken aluminium windows in any RAL colour or dual finish.
• uPVC commercial windows — robust, low-maintenance and cost-effective.
• Double and triple-glazed insulated units with low-E coatings and argon fill.
• Casement, tilt-and-turn, fixed and top-hung opening styles.
• Laminated and acoustic glass for safety, security and noise control.
• Part Q security-rated hardware and locking.
• Trickle vents and integrated blinds where specified.

Our process / installation

We begin with a free survey to measure openings, check access and discuss thermal, acoustic and security goals. We then provide a clear, itemised quote. Once approved, your windows are manufactured to precise dimensions. On site, our fitters protect interiors, remove the old units, install and seal the new windows weather-tight, and clean down. For occupied offices, schools and hospitals we phase the work and fit out of hours to minimise disruption, then complete with FENSA registration and your guarantee paperwork.

Sectors we serve

We install commercial windows for offices and business parks, schools, colleges and universities, hospitals, surgeries and care homes, retail premises and showrooms, and restaurants and hotels. Each specification is tuned to the building's thermal, acoustic, security and aesthetic needs.

Commercial windows across London

We cover all 33 London boroughs. From office refurbishments in the City, Westminster and Islington to schools and care facilities in Croydon, Bromley, Enfield, Hillingdon, Wandsworth and Greenwich, our teams deliver high-performance windows throughout the capital. We understand the realities of working in busy, occupied London buildings — coordinating access, parking and waste removal, and protecting interiors and the public — so installations are tidy, safe and on schedule wherever you are based.

Energy performance & sustainability

Windows are often the weakest thermal link in a commercial building. Upgrading to modern insulated glazing in thermally efficient frames can transform a property's energy performance, reducing heat loss, cutting heating and cooling demand and improving the comfort of everyone inside. Better U-values and solar control also support improved EPC ratings and your wider sustainability and net-zero goals, which matters increasingly for landlords meeting minimum energy efficiency standards and for tenants choosing greener premises. Laminated and acoustic options additionally cut traffic noise — a real benefit on busy London roads — while Part Q-rated hardware enhances security, so a single window upgrade delivers comfort, savings, quiet and protection together.

Pricing guide

Commercial windows are priced on application (POA) because cost depends on frame material, glazing specification, opening style, sizes, quantities and access. We provide a detailed, transparent quote following survey, and free quotes are available for every enquiry. To complete your project, explore our curtain walling and window film, or contact us to discuss your requirements.

Request a quote for energy-efficient commercial windows from Lord Glazing.

Frequently Asked Questions

Should I choose aluminium or uPVC windows?

Aluminium offers slim sightlines, strength and a premium finish, ideal for larger openings and contemporary buildings. uPVC is robust, low-maintenance and more economical. We advise on the best fit for your building and budget.

Will new windows reduce my energy bills?

Yes. Low-E double or triple glazing in thermally efficient frames significantly cuts heat loss compared with older single-glazed units, reducing heating and cooling costs.

Can commercial windows reduce outside noise?

They can. Acoustic and laminated glass units markedly reduce traffic and street noise, creating quieter, more comfortable interiors.

Are your windows secure?

Yes. We offer multi-point locking and Part Q security-rated options, with laminated glass available for added protection against forced entry.

Will you fit windows without closing our premises?

Yes. We phase installations and work out of hours in occupied offices, schools and hospitals to keep disruption to an absolute minimum.

Is your work registered and guaranteed?

It is. We are FENSA registered, so qualifying replacement window work is self-certified for Building Regulations compliance, and every installation is backed by our 10-year guarantee and full insurance for complete peace of mind.