SG18 house prices and areas
SG18 covers Biggleswade in London (Bedfordshire). Here is what homes actually sold for: every standard sale HM Land Registry recorded from January 2025 to September 2026.
Prices by property type
Medians are shown where there were at least 10 sales of that type.
197 sales
292 sales
227 sales
122 sales
Sales by year
| Year | Sales | Median |
|---|---|---|
| 2025 | 574 | £347,750 |
| 2026 (so far) | 264 | £366,500 |
A part-year and a small mix shift (say, more flats sold this year) can move a median without any change in what homes are worth, so treat year-to-year differences with care.
New builds and leasehold
4.1% of SG18 sales were new builds and 14.3% were leasehold. Most sales here were freehold, which usually means houses.
Areas in SG18
Nearby postcodes
Questions about SG18
What is the average house price in SG18?
The median sale price in SG18 was £351,250 across 838 recorded sales from January 2025 to September 2026 (HM Land Registry). Half of sales were between £275,000 and £438,000.
Which areas are in the SG18 postcode?
Boroughly's area guides in SG18 cover Biggleswade. Postcode districts don't follow neighbourhood names exactly, so a street can sit in SG18 but feel part of a neighbouring area.
What type of property sells most in SG18?
Semi-detached homes were the most common sale (292 of 838). Flats had the lowest median, at £206,500. 14.3% of sales were leasehold and 4.1% were new builds.