Flat 3, Knapp House 20
Flat 3, Knapp House 20
Description & Estimates







Flat 3, Knapp House 20, Grantham is described in the public record as a period apartment with 688 ft2 of internal area.
Locally, apartments of this size normally have 2 bedrooms.
Our estimate of the sale value of Flat 3, Knapp House 20, Grantham is £89,374 and its rental estimate is £515 per month, given the available information and assuming reasonable condition.
Knapp House, Swinegate is a residential building on Swinegate, Grantham, NG31 and falls within the NG31 postal district and the borough of South Kesteven.
Our Data Sources
Flat 3, Knapp House 20, Grantham has no records in the the Land Registry and a single entry in the EPC database dated September 2025.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 1 out of 5 and is considered of low accuracy.
Price Range & Condition
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For Flat 3, Knapp House 20, Grantham, we estimate a market value of £93,842 and a rental value of £541 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £83,118 and £479 per month respectively.
Recent Market Change
Over the last year, Flat 3, Knapp House 20, Grantham has seen its estimated sale value decline by £1,534 (1.7%) and its estimated rental value climb by £23 per month (4.4%). This results in an estimated gross rental yield of 6.9%.
Energy Efficiency
Flat 3, Knapp House 20, Grantham has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 05 Sep 2025.
The property is not connected to mains gas and has high performance glazing. It is heated using Room heaters, electric.
Similar Properties Sold Nearby
Over the past 2 years 3 properties similar to Flat 3, Knapp House 20, Grantham have sold within a radius of 530 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 2nd April 2024, was 6, High Street, Grantham, NG31 6PN, a leasehold flat which sold for £210,000.
Read more about house prices in NG31.
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Of the 85 addresses on Swinegate, Grantham, NG31, Flat 3, Knapp House 20, Grantham comes out as the 39th largest and the 54th most expensive in our analysis of the public data.
It is also £120k less expensive than the average property across the NG31 district.
More reading links
Schools Nearby
- 100mSt Wulfram's National Church of England Primary School
- 700mThe Little Gonerby Church of England Primary Academy, Grantham
- 900mSaint Mary's Catholic Voluntary Academy
- 200mThe King's School, Grantham
- 600mKesteven and Grantham Girls' School
- 1.0kmThe Priory Ruskin Academy
More reading links
Public Transport Nearby
From Flat 3, Knapp House 20, Grantham, the nearest station is Grantham, 900 metres away.
- 900mGrantham
- 10.8kmBottesford
- 10.9kmAncaster
Available Internet Speeds
Broadband here reaches superfast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Superfast broadband is available in the area.
Risk of Flooding
The flood risk here is rated very low, based on Environment Agency data.

