Window locks are the most overlooked part of home security in South London. This guide covers all window lock types, honest prices for Dulwich homes, and which solutions offer real burglary resistance versus false confidence.
Window Lock Prices in Dulwich — What You Should Expect to Pay
Window security is one of the most requested services TrustLock handles across Dulwich (SE21), East Dulwich (SE22), Herne Hill (SE24), and Peckham (SE15). Most enquiries come after a neighbour has been burgled or after a surveyor flags window locks on a mortgage report.
Here are honest supply-and-fit prices for the most common window lock types in South London homes.
Prices by Window Lock Type
Sash Window Locks (SE21 / SE22 Victorian Terraces)
Dulwich and East Dulwich are dominated by Victorian sash windows. The most effective locks for these are:
| Lock Type | Supply & Fit Per Window |
|---|---|
| Sash stop (dual-screw type) | from £45 |
| Dual sash locks (top and bottom rail) | from £75 |
| Sash restrictor / chain stop | from £55 |
| Full sash window security kit (2 stops + 1 restrictor) | from £95 |
**Our recommendation:** For any ground-floor or easily accessible sash window, fit dual sash stops and a restrictor. The restrictor allows ventilation without allowing the window to be fully opened from outside.
UPVC Casement Window Locks
Modern UPVC windows have an espagnolette mechanism — a multipoint system operated by the handle. When the handle is worn or broken, the window can sometimes be pushed open even when appearing closed.
| Service | Price |
|---|---|
| UPVC handle replacement (single window) | from £55 |
| UPVC window mechanism repair | from £65 |
| Additional cockspur or peg stay lock | from £45 |
| Window shoot-bolt lock | from £50 |
Wooden Casement Windows
Older wooden casement windows are common in Dulwich Village properties and the conservation areas around SE21 and SE22.
| Lock Type | Supply & Fit Per Window |
|---|---|
| Key-lockable casement stay | from £45 |
| Surface-mounted locking latch | from £55 |
| Cockspur handle replacement (locking type) | from £50 |
Key-Lockable Stays and Restrictors
Any window that can be used for ventilation while unattended — bedroom windows, top-floor skylights, bathroom fanlights — should have a restrictor or lockable stay fitted.
| Product | Supply & Fit |
|---|---|
| Child safety window restrictor | from £40 |
| Key-lockable restrictor (ventilation lock) | from £50 |
| Locking fanlight stay | from £45 |
Multi-Window Discounts
For full-property window security assessments and fitting across multiple windows, TrustLock prices are:
| Scope | Discount Applied |
|---|---|
| 3–5 windows | 10% off individual prices |
| 6–10 windows | 15% off individual prices |
| Whole-house survey + fitting | Fixed quote, usually 20–25% below individual |
What Affects the Final Price?
**Window condition:** A window frame that is rotting, warped, or previously forced will take longer to work with. We flag this before starting and provide a revised quote.
**Lock specification:** Insurance-approved window locks (BS EN 13126 or Secured by Design) cost more than basic catches. If your insurer requires rated hardware, we can specify accordingly.
**Access:** Ground-floor windows are straightforward. Anything requiring a ladder or restricted access (bay windows, rear extensions) adds a small access charge — we always discuss this upfront.
**Existing fittings:** If a broken mechanism needs to be removed before fitting, there may be a small additional charge for preparation.
Do My Window Locks Affect Home Insurance?
Yes, for most standard home insurance policies in the UK. If your policy schedule specifies that all accessible windows must have key-operated locks, fitting only passive catches is not compliant. Some insurers will reduce your premium for Secured by Design or Sold Secure rated hardware.
If you are moving into a Dulwich property and your mortgage surveyor has flagged window security, we can supply a written confirmation of the work carried out for your insurer.
Most Common Window Requests in Dulwich
Based on jobs TrustLock handles regularly across SE21, SE22, SE24, SE15, and SE5:
1. **Victorian sash window stops** — the single most common request
2. **UPVC handle replacement** (security-grade, locking)
3. **Child restrictors** on upstairs bedrooms
4. **Post-burglary window repair** — often ground floor rear
5. **Pre-letting compliance checks** — landlords fitting locks ahead of new tenancies
Getting a Quote
TrustLock provides fixed prices before any work starts. Call **07984 547185** or [request a free quote](/contact) and we will confirm the price for your specific window types.
We cover East Dulwich (SE22), Dulwich (SE21), Herne Hill (SE24), Peckham (SE15), Camberwell (SE5), Brixton (SW2), and Southwark (SE1).