Survey and coordinate the connection to the existing building
Steel frame category · 2 products
Single-storey extension steel frames.
Compare published single-storey extension steel frames by dimensions, weight, openings and reference price before project-specific design checks.
Quick answer
An extension frame has to connect to an existing building and a site-specific foundation and envelope. The published configuration does not replace structural design, surveys, approvals, thermal and moisture detailing, drainage or responsibility for the existing structure.
Before choosing a frame
Compare the published facts, then check the project.
Every product below has its own factual specification, product-specific answers and links to the nearest published sizes in this category.
Confirm structural design, foundations and approvals
Resolve thermal, moisture, roof and drainage details
Single-storey extensions
2 published configurations.
Reference prices are not final Forti Nova offers. Open a frame to see its dimensions, footprint, listed weight, openings, decision checks and quotation requirements.
Single-storey extensions
Single Storey Extension 001 Steel Frame
Online frame price£6,263.19
- Frame
- 8500 × 4500 mm
- Footprint
- 38.3 m²
- Height
- 2737 mm
- Listed weight
- 1499 kg
Single-storey extensions
Single Storey Extension 002 Steel Frame
Online frame price£5,058.70
- Frame
- 7000 × 4015 mm
- Footprint
- 28.1 m²
- Height
- 2832 mm
- Listed weight
- 1129 kg
Category questions
Answers about single-storey extensions.
What is included in the single-storey extension steel frames listings?
Each page describes the published structural frame or component shown. A finished building, foundations, erection, envelope, glazing, services and internal finishes are separate unless the written quotation states otherwise.
How should I compare the 2 single-storey extensions products?
Compare overall dimensions, approximate footprint, listed weight, product type, openings and the project checks shown on each page. Finished usable space and suitability must be confirmed from project drawings.
Are the prices for single-storey extensions final?
No. They are online frame prices captured on the catalogue check date. Forti Nova confirms availability, VAT basis, current selling price, delivery, drawings, inclusions and exclusions in writing.
Can Forti Nova include ground screws and erection?
Forti Nova can assess suitable projects for ground screws, frame supply and professional erection. The selected frame, postcode, ground, design loads, access and programme must be reviewed first.
Bundle advantage
Ground screws · frame · erection
Get bundle quote Request a current single-storey extensions project quotation.
Bundle suitable ground screws, the steel frame and professional erection, then access discounted cladding, EPDM roofing and roofline within the same quotation. Eligibility and scope are confirmed for the project.