THE WORK, EXPLAINED
Start with the condition.
Understand the scope.
Ask for the opening assessment, selected window and any proposed opening changes to be identified separately. Have the provider explain who will confirm the project-specific requirements and how the completed opening will be checked against them. Include surrounding construction and finishing responsibilities in the proposal; a service-page description does not establish compliance for a room.
What may be involved
- window sized for the required clear opening
- header and framing lumber when required
- sill pan
- flashing
- fasteners
- insulation
- trim
Ask the provider to distinguish existing parts to inspect, proposed replacements, and tools, materials or reports included in the service. Confirm the work and exclusions after assessment; this list does not mean that every item will be supplied or replaced.
LOCAL RESEARCH / Los Altos Hills
Local context
The US Consumer Product Safety Commission’s window-fall guidance says never to depend on screens to keep children from falling out of windows, and suggests window guards, or window stops so that a window opens no more than 4 inches. It matters when you change how a window opens or replace hardware or screens. Raise it with the provider if young children use the room, and ask how any guard or stop interacts with escape and rescue openings. This is national safety guidance, not a compliance finding for your property.
Source ↗Planning your work
Los Altos Hills reviews plans against building, plumbing, electrical, mechanical and energy codes, and lists smaller permit types including water heaters, furnaces, HVAC, reroofs and seismic retrofits. Confirm the address, the proposed scope and which permits apply with the Town of Los Altos Hills before work starts. This reference concerns the Town of Los Altos Hills; it does not establish requirements for a neighbouring jurisdiction or for an individual property.
Source ↗Area-wide context does not establish the condition of your property or equipment.
Before the visit
Identify the affected opening and describe the symptom. Gather available product labels and previous work records. Explain access restrictions and keep the opening clear.
Service illustration · not a completed customer project

